Merge branch 'feat/tzaware' into dev/main-for-tzaware-merge

.github/workflows/build.yml

@@ -144,6 +144,8 @@ jobs:
       run: |
         echo "Running checks..."
         ./ietf/manage.py check
+        ./ietf/manage.py migrate || true
+        echo "USE_TZ = True" >> ./ietf/settings_local.py
         ./ietf/manage.py migrate
         echo "Validating migrations..."
         if ! ( ietf/manage.py makemigrations --dry-run --check --verbosity 3 ) ; then

bin/add-old-drafts-from-archive.py

@@ -16,6 +16,7 @@ from django.conf import settings
 from django.core.validators import validate_email, ValidationError
 from ietf.utils.draft import PlaintextDraft
 from ietf.submit.utils import update_authors
+from ietf.utils.timezone import date_today
 
 import debug                            # pyflakes:ignore
 
@@ -66,9 +67,9 @@ for name in sorted(names):
                     print name, rev, "Can't parse", p,":",e
                     continue
             if draft.errors and draft.errors.keys()!=['draftname',]:
-                print "Errors - could not process", name, rev, datetime.datetime.fromtimestamp(p.stat().st_mtime), draft.errors, draft.get_title().encode('utf8')
+                print "Errors - could not process", name, rev, datetime.datetime.fromtimestamp(p.stat().st_mtime, datetime.timezone.utc), draft.errors, draft.get_title().encode('utf8')
             else:
-                time = datetime.datetime.fromtimestamp(p.stat().st_mtime)
+                time = datetime.datetime.fromtimestamp(p.stat().st_mtime, datetime.timezone.utc)
                 if not doc:
                     doc = Document.objects.create(name=name,
                                                   time=time,
@@ -140,7 +141,7 @@ for name in sorted(names):
                         doc = doc,
                         rev = rev,
                         by = system,
-                        desc = "Revision added from id-archive on %s by %s"%(datetime.date.today(),sys.argv[0]),
+                        desc = "Revision added from id-archive on %s by %s"%(date_today(),sys.argv[0]),
                         time=time,
                 )
                 events.append(e)

bin/check-copyright

@@ -162,7 +162,7 @@ def get_first_commit(path):
             else:
                 pass
     except OSError:
-        rev, who, when = None, None, datetime.datetime.now()
+        rev, who, when = None, None, datetime.datetime.now(datetime.timezone.utc)
     return { path: { 'rev': rev, 'who': who, 'date': when.strftime('%Y-%m-%d %H:%M:%S'), }, }
 
 

dev/deploy-to-container/start.sh

@@ -9,7 +9,31 @@ chmod +x ./app-create-dirs.sh
 ./app-create-dirs.sh
 echo "Running Datatracker checks..."
 ./ietf/manage.py check
-echo "Running Datatracker migrations..."
-./ietf/manage.py migrate
+
+# Migrate, adjusting to what the current state of the underlying database might be:
+WORKSPACEDIR=.
+if ietf/manage.py showmigrations | grep "\[ \] 0003_pause_to_change_use_tz"; then
+    if grep "USE_TZ" $WORKSPACEDIR/ietf/settings_local.py; then
+        cat $WORKSPACEDIR/ietf/settings_local.py | sed 's/USE_TZ.*$/USE_TZ = False/' > /tmp/settings_local.py && mv /tmp/settings_local.py $WORKSPACEDIR/ietf/settings_local.py
+    else
+        echo "USE_TZ = False" >> $WORKSPACEDIR/ietf/settings_local.py
+    fi
+    echo "Running Datatracker migrations with USE_TZ = False..."
+    # This is expected to exit non-zero at the pause
+    /usr/local/bin/python $WORKSPACEDIR/ietf/manage.py migrate --settings=settings_local || true
+    cat $WORKSPACEDIR/ietf/settings_local.py | sed 's/USE_TZ.*$/USE_TZ = True/' > /tmp/settings_local.py && mv /tmp/settings_local.py $WORKSPACEDIR/ietf/settings_local.py
+    echo "Running Datatracker migrations with USE_TZ = True..."
+    /usr/local/bin/python $WORKSPACEDIR/ietf/manage.py migrate --settings=settings_local
+
+else
+    if grep "USE_TZ" $WORKSPACEDIR/ietf/settings_local.py; then
+        cat $WORKSPACEDIR/ietf/settings_local.py | sed 's/USE_TZ.*$/USE_TZ = True/' > /tmp/settings_local.py && mv /tmp/settings_local.py $WORKSPACEDIR/ietf/settings_local.py
+    else
+        echo "USE_TZ = True" >> $WORKSPACEDIR/ietf/settings_local.py
+    echo "Running Datatracker migrations..."
+    /usr/local/bin/python $WORKSPACEDIR/ietf/manage.py migrate --settings=settings_local
+    fi
+fi
+
 echo "Starting Datatracker..."
 ./ietf/manage.py runserver 0.0.0.0:8000 --settings=settings_local

dev/diff/prepare.sh

@@ -12,5 +12,24 @@ yarn legacy:build
 echo "Creating data directories..."
 chmod +x ./docker/scripts/app-create-dirs.sh
 ./docker/scripts/app-create-dirs.sh
+
 ./ietf/manage.py check
-./ietf/manage.py migrate
+if ./ietf/manage.py showmigrations | grep "\[ \] 0003_pause_to_change_use_tz"; then
+    if grep "USE_TZ" ./ietf/settings_local.py; then
+        cat ./ietf/settings_local.py | sed 's/USE_TZ.*$/USE_TZ = False/' > /tmp/settings_local.py && mv /tmp/settings_local.py ./ietf/settings_local.py
+    else
+        echo "USE_TZ = False" >> ./ietf/settings_local.py
+    fi
+    # This is expected to exit non-zero at the pause
+    /usr/local/bin/python ./ietf/manage.py migrate  || true
+    cat ./ietf/settings_local.py | sed 's/USE_TZ.*$/USE_TZ = True/' > /tmp/settings_local.py && mv /tmp/settings_local.py ./ietf/settings_local.py
+    /usr/local/bin/python ./ietf/manage.py migrate
+
+else
+    if grep "USE_TZ" ./ietf/settings_local.py; then
+        cat ./ietf/settings_local.py | sed 's/USE_TZ.*$/USE_TZ = True/' > /tmp/settings_local.py && mv /tmp/settings_local.py ./ietf/settings_local.py
+    else
+        echo "USE_TZ = True" >> ./ietf/settings_local.py
+    /usr/local/bin/python ./ietf/manage.py migrate
+    fi
+fi

docker/scripts/app-init.sh

@@ -100,7 +100,28 @@ echo "Starting memcached..."
 
 echo "Running initial checks..."
 /usr/local/bin/python $WORKSPACEDIR/ietf/manage.py check --settings=settings_local
-# /usr/local/bin/python $WORKSPACEDIR/ietf/manage.py migrate --settings=settings_local
+
+# Migrate, adjusting to what the current state of the underlying database might be:
+
+if ietf/manage.py showmigrations | grep "\[ \] 0003_pause_to_change_use_tz"; then
+    if grep "USE_TZ" $WORKSPACEDIR/ietf/settings_local.py; then
+        cat $WORKSPACEDIR/ietf/settings_local.py | sed 's/USE_TZ.*$/USE_TZ = False/' > /tmp/settings_local.py && mv /tmp/settings_local.py $WORKSPACEDIR/ietf/settings_local.py
+    else
+        echo "USE_TZ = False" >> $WORKSPACEDIR/ietf/settings_local.py
+    fi
+    # This is expected to exit non-zero at the pause
+    /usr/local/bin/python $WORKSPACEDIR/ietf/manage.py migrate --settings=settings_local || true
+    cat $WORKSPACEDIR/ietf/settings_local.py | sed 's/USE_TZ.*$/USE_TZ = True/' > /tmp/settings_local.py && mv /tmp/settings_local.py $WORKSPACEDIR/ietf/settings_local.py
+    /usr/local/bin/python $WORKSPACEDIR/ietf/manage.py migrate --settings=settings_local
+
+else
+    if grep "USE_TZ" $WORKSPACEDIR/ietf/settings_local.py; then
+        cat $WORKSPACEDIR/ietf/settings_local.py | sed 's/USE_TZ.*$/USE_TZ = True/' > /tmp/settings_local.py && mv /tmp/settings_local.py $WORKSPACEDIR/ietf/settings_local.py
+    else
+        echo "USE_TZ = True" >> $WORKSPACEDIR/ietf/settings_local.py
+    /usr/local/bin/python $WORKSPACEDIR/ietf/manage.py migrate --settings=settings_local
+    fi
+fi
 
 echo "-----------------------------------------------------------------"
 echo "Done!"

ietf/api/management/commands/makeresources.py

@@ -3,7 +3,6 @@
 
 
 import os
-import datetime
 import collections
 import io
 
@@ -14,6 +13,7 @@ import debug                            # pyflakes:ignore
 from django.core.management.base import AppCommand
 from django.db import models
 from django.template import Template, Context
+from django.utils import timezone
 
 from tastypie.resources import ModelResource
 
@@ -89,7 +89,7 @@ class Command(AppCommand):
                     info = dict(
                         app=app.name,
                         app_label=app.label,
-                        date=datetime.datetime.now()
+                        date=timezone.now()
                     )
                     new_models = {}
                     for model, rclass_name in missing_resources:

ietf/api/tests.py

@@ -32,6 +32,7 @@ from ietf.person.models import User
 from ietf.person.models import PersonalApiKey
 from ietf.stats.models import MeetingRegistration
 from ietf.utils.mail import outbox, get_payload_text
+from ietf.utils.models import DumpInfo
 from ietf.utils.test_utils import TestCase, login_testing_unauthorized
 
 OMITTED_APPS = (
@@ -508,10 +509,17 @@ class CustomApiTests(TestCase):
         self.assertEqual(set(missing_fields), set(drop_fields))
 
     def test_api_version(self):
+        DumpInfo.objects.create(date=timezone.datetime(2022,8,31,7,10,1,tzinfo=timezone.utc), host='testapi.example.com',tz='UTC')
         url = urlreverse('ietf.api.views.version')
         r = self.client.get(url)
         data = r.json()
         self.assertEqual(data['version'], ietf.__version__+ietf.__patch__)
+        self.assertEqual(data['dumptime'], "2022-08-31 07:10:01 +0000")
+        DumpInfo.objects.update(tz='PST8PDT')
+        r = self.client.get(url)
+        data = r.json()        
+        self.assertEqual(data['dumptime'], "2022-08-31 07:10:01 -0700")
+
 
     def test_api_appauth(self):
         url = urlreverse('ietf.api.views.app_auth')

ietf/api/views.py

@@ -203,8 +203,13 @@ def api_new_meeting_registration(request):
 
 
 def version(request):
+    dumpdate = None
     dumpinfo = DumpInfo.objects.order_by('-date').first()
-    dumptime = pytz.timezone(dumpinfo.tz).localize(dumpinfo.date).strftime('%Y-%m-%d %H:%M:%S %z') if dumpinfo else None
+    if dumpinfo:
+        dumpdate = dumpinfo.date
+        if dumpinfo.tz != "UTC":
+            dumpdate = pytz.timezone(dumpinfo.tz).localize(dumpinfo.date.replace(tzinfo=None))
+    dumptime = dumpdate.strftime('%Y-%m-%d %H:%M:%S %z') if dumpinfo else None
     return HttpResponse(
             json.dumps({
                         'version': ietf.__version__+ietf.__patch__,

ietf/bin/create-charter-newrevisiondocevents

@@ -28,7 +28,7 @@ def warn(string):
 # ------------------------------------------------------------------------------
 
 import re
-from datetime import datetime as Datetime
+import datetime
 
 import django
 django.setup()
@@ -44,7 +44,7 @@ system_entity = Person.objects.get(name="(System)")
 charterdir = Path(settings.CHARTER_PATH)
 for file in charterdir.files("charter-ietf-*.txt"):
     fname = file.name
-    ftime = Datetime.fromtimestamp(file.mtime)
+    ftime = datetime.datetime.fromtimestamp(file.mtime, datetime.timezone.utc)
     match = re.search("^(?P<name>[a-z0-9-]+)-(?P<rev>\d\d-\d\d)\.txt$", fname)
     if match:
         name = match.group("name")

ietf/bin/iana-changes-updates

@@ -18,6 +18,7 @@ django.setup()
 
 from django.conf import settings
 from optparse import OptionParser
+from zoneinfo import ZoneInfo
 
 parser = OptionParser()
 parser.add_option("-f", "--from", dest="start",
@@ -38,13 +39,16 @@ CLOCK_SKEW_COMPENSATION = 5 # seconds
 MAX_INTERVAL_ACCEPTED_BY_IANA = datetime.timedelta(hours=23)
 
 
+local_tzinfo = ZoneInfo(settings.TIME_ZONE)
 start = datetime.datetime.now() - datetime.timedelta(hours=23) + datetime.timedelta(seconds=CLOCK_SKEW_COMPENSATION)
 if options.start:
     start = datetime.datetime.strptime(options.start, "%Y-%m-%d %H:%M:%S")
+start = start.replace(tzinfo=local_tzinfo).astimezone(datetime.timezone.utc)
 
 end = start + datetime.timedelta(hours=23)
 if options.end:
-    end = datetime.datetime.strptime(options.end, "%Y-%m-%d %H:%M:%S")
+    end = datetime.datetime.strptime(options.end, "%Y-%m-%d %H:%M:%S").replace(tzinfo=local_tzinfo)
+end = end.astimezone(datetime.timezone.utc)
 
 syslog.openlog(os.path.basename(__file__), syslog.LOG_PID, syslog.LOG_USER)
 
@@ -52,7 +56,13 @@ syslog.openlog(os.path.basename(__file__), syslog.LOG_PID, syslog.LOG_USER)
 
 from ietf.sync.iana import fetch_changes_json, parse_changes_json, update_history_with_changes
 
-syslog.syslog("Updating history log with new changes from IANA from %s, period %s - %s" % (settings.IANA_SYNC_CHANGES_URL, start, end))
+syslog.syslog(
+    "Updating history log with new changes from IANA from %s, period %s - %s" % (
+        settings.IANA_SYNC_CHANGES_URL,
+        start.astimezone(local_tzinfo),
+        end.astimezone(local_tzinfo),
+    )
+)
 
 t = start
 while t < end:

ietf/bin/rfc-editor-index-updates

@@ -29,6 +29,7 @@ from django.core.mail import mail_admins
 from ietf.doc.utils import rebuild_reference_relations
 from ietf.utils.log import log
 from ietf.utils.pipe import pipe
+from ietf.utils.timezone import date_today
 
 import ietf.sync.rfceditor
 
@@ -39,7 +40,7 @@ parser.add_option("-d", dest="skip_date",
 
 options, args = parser.parse_args()
 
-skip_date = datetime.date.today() - datetime.timedelta(days=365)
+skip_date = date_today() - datetime.timedelta(days=365)
 if options.skip_date:
     skip_date = datetime.datetime.strptime(options.skip_date, "%Y-%m-%d").date()
 

ietf/bin/send-review-reminders

@@ -26,8 +26,9 @@ from ietf.review.utils import (
     send_unavailability_period_ending_reminder, send_reminder_all_open_reviews,
     send_review_reminder_overdue_assignment, send_reminder_unconfirmed_assignments)
 from ietf.utils.log import log
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
 
-today = datetime.date.today()
+today = date_today(DEADLINE_TZINFO)
 
 for assignment in review_assignments_needing_reviewer_reminder(today):
     email_reviewer_reminder(assignment)

ietf/bin/send-scheduled-mail

@@ -3,7 +3,7 @@
 # This script requires that the proper virtual python environment has been
 # invoked before start
 
-import datetime, os, sys
+import os, sys
 import syslog
 
 # boilerplate
@@ -16,6 +16,7 @@ syslog.openlog(os.path.basename(__file__), syslog.LOG_PID, syslog.LOG_USER)
 
 import django
 django.setup()
+from django.utils import timezone
 
 from ietf.utils.mail import log_smtp_exception, send_error_email
 from smtplib import SMTPException
@@ -32,7 +33,7 @@ from ietf.message.models import SendQueue
 
 mode = sys.argv[1]
 
-now = datetime.datetime.now()
+now = timezone.now()
 
 needs_sending = SendQueue.objects.filter(sent_at=None).select_related("message")
 if mode == "specific":

ietf/community/views.py

@@ -10,6 +10,7 @@ import uuid
 from django.http import HttpResponse, HttpResponseRedirect, Http404
 from django.shortcuts import get_object_or_404, render
 from django.contrib.auth.decorators import login_required
+from django.utils import timezone
 from django.utils.html import strip_tags
 
 import debug                            # pyflakes:ignore
@@ -218,7 +219,7 @@ def feed(request, username=None, acronym=None, group_type=None):
     significant = request.GET.get('significant', '') == '1'
 
     documents = docs_tracked_by_community_list(clist).values_list('pk', flat=True)
-    since = datetime.datetime.now() - datetime.timedelta(days=14)
+    since = timezone.now() - datetime.timedelta(days=14)
 
     events = DocEvent.objects.filter(
         doc__id__in=documents,
@@ -243,7 +244,7 @@ def feed(request, username=None, acronym=None, group_type=None):
         'title': title,
         'subtitle': subtitle,
         'id': feed_id.urn,
-        'updated': datetime.datetime.now(),
+        'updated': timezone.now(),
     }, content_type='text/xml')
 
 

ietf/doc/expire.py

@@ -4,6 +4,7 @@
 
 
 from django.conf import settings
+from django.utils import timezone
 
 import datetime, os, shutil, glob, re
 from pathlib import Path
@@ -17,6 +18,7 @@ from ietf.person.models import Person
 from ietf.meeting.models import Meeting
 from ietf.doc.utils import add_state_change_event, update_action_holders
 from ietf.mailtrigger.utils import gather_address_lists
+from ietf.utils.timezone import date_today, datetime_today, DEADLINE_TZINFO
 
 
 nonexpirable_states: Optional[List[State]] = None
@@ -52,17 +54,17 @@ def expirable_drafts(queryset=None):
 
 
 def get_soon_to_expire_drafts(days_of_warning):
-    start_date = datetime.date.today() - datetime.timedelta(1)
+    start_date = datetime_today(DEADLINE_TZINFO) - datetime.timedelta(1)
     end_date = start_date + datetime.timedelta(days_of_warning)
 
     return expirable_drafts().filter(expires__gte=start_date, expires__lt=end_date)
 
 def get_expired_drafts():
-    return expirable_drafts().filter(expires__lt=datetime.date.today() + datetime.timedelta(1))
+    return expirable_drafts().filter(expires__lt=datetime_today(DEADLINE_TZINFO) + datetime.timedelta(1))
 
 def in_draft_expire_freeze(when=None):
     if when == None:
-        when = datetime.datetime.now()
+        when = timezone.now()
 
     meeting = Meeting.objects.filter(type='ietf', date__gte=when-datetime.timedelta(days=7)).order_by('date').first()
 
@@ -84,7 +86,7 @@ def send_expire_warning_for_draft(doc):
         (doc.get_state_slug("draft") != "active")):
         return # don't warn about dead or inactive documents
 
-    expiration = doc.expires.date()
+    expiration = doc.expires.astimezone(DEADLINE_TZINFO).date()
 
     (to,cc) = gather_address_lists('doc_expires_soon',doc=doc)
 
@@ -171,7 +173,7 @@ def expire_draft(doc):
 
 def clean_up_draft_files():
     """Move unidentified and old files out of the Internet Draft directory."""
-    cut_off = datetime.date.today()
+    cut_off = date_today(DEADLINE_TZINFO)
 
     pattern = os.path.join(settings.INTERNET_DRAFT_PATH, "draft-*.*")
     filename_re = re.compile(r'^(.*)-(\d\d)$')
@@ -214,7 +216,9 @@ def clean_up_draft_files():
 
             if state in ("rfc","repl"):
                 move_file_to("")
-            elif state in ("expired", "auth-rm", "ietf-rm") and doc.expires and doc.expires.date() < cut_off:
+            elif (state in ("expired", "auth-rm", "ietf-rm")
+                  and doc.expires
+                  and doc.expires.astimezone(DEADLINE_TZINFO).date() < cut_off):
                 move_file_to("")
 
         except Document.DoesNotExist:

ietf/doc/factories.py

@@ -10,6 +10,7 @@ import datetime
 from typing import Optional         # pyflakes:ignore
 
 from django.conf import settings
+from django.utils import timezone
 
 from ietf.doc.models import ( Document, DocEvent, NewRevisionDocEvent, DocAlias, State, DocumentAuthor,
     StateDocEvent, BallotPositionDocEvent, BallotDocEvent, BallotType, IRSGBallotDocEvent, TelechatDocEvent,
@@ -18,6 +19,7 @@ from ietf.group.models import Group
 from ietf.person.factories import PersonFactory
 from ietf.group.factories import RoleFactory
 from ietf.utils.text import xslugify
+from ietf.utils.timezone import date_today
 
 
 def draft_name_generator(type_id,group,n):
@@ -38,7 +40,7 @@ class BaseDocumentFactory(factory.django.DjangoModelFactory):
     rev = '00'
     std_level_id = None                 # type: Optional[str]
     intended_std_level_id = None
-    time = datetime.datetime.now()
+    time = timezone.now()
     expires = factory.LazyAttribute(lambda o: o.time+datetime.timedelta(days=settings.INTERNET_DRAFT_DAYS_TO_EXPIRE))
     pages = factory.fuzzy.FuzzyInteger(2,400)
 
@@ -320,7 +322,7 @@ class ConflictReviewFactory(BaseDocumentFactory):
 # This is very skeletal. It is enough for the tests that use it now, but when it's needed, it will need to be improved with, at least, a group generator that backs the object with a review team.
 class ReviewFactory(BaseDocumentFactory):
     type_id = 'review'
-    name = factory.LazyAttribute(lambda o: 'review-doesnotexist-00-%s-%s'%(o.group.acronym,datetime.date.today().isoformat()))
+    name = factory.LazyAttribute(lambda o: 'review-doesnotexist-00-%s-%s'%(o.group.acronym,date_today().isoformat()))
     group = factory.SubFactory('ietf.group.factories.GroupFactory',type_id='review')
 
 class DocAliasFactory(factory.django.DjangoModelFactory):
@@ -357,7 +359,8 @@ class TelechatDocEventFactory(DocEventFactory):
     class Meta:
         model = TelechatDocEvent
 
-    telechat_date = datetime.datetime.today()+datetime.timedelta(days=14)
+    # note: this is evaluated at import time and not updated - all events will have the same telechat_date
+    telechat_date = timezone.now()+datetime.timedelta(days=14)
     type = 'scheduled_for_telechat'
 
 class NewRevisionDocEventFactory(DocEventFactory):
@@ -410,7 +413,7 @@ class IRSGBallotDocEventFactory(BallotDocEventFactory):
     class Meta:
         model = IRSGBallotDocEvent
 
-    duedate = datetime.datetime.now() + datetime.timedelta(days=14)
+    duedate = timezone.now() + datetime.timedelta(days=14)
     ballot_type = factory.SubFactory(BallotTypeFactory, slug='irsg-approve')
 
 class BallotPositionDocEventFactory(DocEventFactory):

ietf/doc/feeds.py

@@ -10,11 +10,13 @@ from django.utils.feedgenerator import Atom1Feed, Rss201rev2Feed
 from django.urls import reverse as urlreverse
 from django.template.defaultfilters import truncatewords, truncatewords_html, date as datefilter
 from django.template.defaultfilters import linebreaks # type: ignore
+from django.utils import timezone
 from django.utils.html import strip_tags
 
 from ietf.doc.models import Document, State, LastCallDocEvent, DocEvent
 from ietf.doc.utils import augment_events_with_revision
 from ietf.doc.templatetags.ietf_filters import format_textarea
+from ietf.utils.timezone import RPC_TZINFO
 
 
 def strip_control_characters(s):
@@ -133,9 +135,16 @@ class RfcFeed(Feed):
     
     def items(self):
         if self.year:
-            rfc_events = DocEvent.objects.filter(type='published_rfc',time__year=self.year).order_by('-time')
+            # Find published RFCs based on their official publication year
+            start_of_year = datetime.datetime(int(self.year), 1, 1, tzinfo=RPC_TZINFO)
+            start_of_next_year = datetime.datetime(int(self.year) + 1, 1, 1, tzinfo=RPC_TZINFO)
+            rfc_events = DocEvent.objects.filter(
+                type='published_rfc',
+                time__gte=start_of_year,
+                time__lt=start_of_next_year,
+            ).order_by('-time')
         else:
-            cutoff = datetime.datetime.now() - datetime.timedelta(days=8)
+            cutoff = timezone.now() - datetime.timedelta(days=8)
             rfc_events = DocEvent.objects.filter(type='published_rfc',time__gte=cutoff).order_by('-time')
         results = [(e.doc, e.time) for e in rfc_events]
         for doc,time in results:

ietf/doc/forms.py

@@ -15,6 +15,7 @@ from ietf.person.fields import SearchablePersonField, SearchablePersonsField
 from ietf.person.models import Email, Person
 
 from ietf.name.models import ExtResourceName
+from ietf.utils.timezone import date_today
 from ietf.utils.validators import validate_external_resource_value
 
 class TelechatForm(forms.Form):
@@ -34,7 +35,7 @@ class TelechatForm(forms.Form):
         for d in dates:
           self.page_count[d] = telechat_page_count(date=d).for_approval
           choice_display[d] = '%s (%s pages)' % (d.strftime("%Y-%m-%d"),self.page_count[d])
-          if d-datetime.date.today() < datetime.timedelta(days=13):
+          if d - date_today() < datetime.timedelta(days=13):
               choice_display[d] += ' : WARNING - this may not leave enough time for directorate reviews!'
         self.fields['telechat_date'].choices = [("", "(not on agenda)")] + [(d, choice_display[d]) for d in dates]
 

ietf/doc/lastcall.py

@@ -1,7 +1,5 @@
 # helpers for handling last calls on Internet Drafts
 
-import datetime
-
 from django.db.models import Q
 
 from ietf.doc.models import Document, State, DocEvent, LastCallDocEvent, WriteupDocEvent
@@ -10,6 +8,8 @@ from ietf.person.models import Person
 from ietf.doc.utils import add_state_change_event, update_action_holders
 from ietf.doc.mails import generate_ballot_writeup, generate_approval_mail, generate_last_call_announcement
 from ietf.doc.mails import send_last_call_request, email_last_call_expired, email_last_call_expired_with_downref
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
+
 
 def request_last_call(request, doc):
     if not doc.latest_event(type="changed_ballot_writeup_text"):
@@ -33,11 +33,10 @@ def request_last_call(request, doc):
     e.save()
 
 def get_expired_last_calls():
-    today = datetime.date.today()
     for d in Document.objects.filter(Q(states__type="draft-iesg", states__slug="lc")
                                     | Q(states__type="statchg", states__slug="in-lc")):
         e = d.latest_event(LastCallDocEvent, type="sent_last_call")
-        if e and e.expires.date() <= today:
+        if e and e.expires.astimezone(DEADLINE_TZINFO).date() <= date_today(DEADLINE_TZINFO):
             yield d
 
 def expire_last_call(doc):

ietf/doc/mails.py

@@ -10,6 +10,7 @@ from django.template.loader import render_to_string
 from django.utils.html import strip_tags
 from django.conf import settings
 from django.urls import reverse as urlreverse
+from django.utils import timezone
 from django.utils.encoding import force_text
 
 import debug                            # pyflakes:ignore
@@ -24,6 +25,7 @@ from ietf.doc.utils_bofreq import bofreq_editors, bofreq_responsible
 from ietf.group.models import Role
 from ietf.doc.models import Document
 from ietf.mailtrigger.utils import gather_address_lists
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
 
 
 def email_state_changed(request, doc, text, mailtrigger_id=None):
@@ -191,7 +193,7 @@ def generate_ballot_rfceditornote(request, doc):
     return e
 
 def generate_last_call_announcement(request, doc):
-    expiration_date = datetime.date.today() + datetime.timedelta(days=14)
+    expiration_date = date_today(DEADLINE_TZINFO) + datetime.timedelta(days=14)
     if doc.group.type_id in ("individ", "area"):
         group = "an individual submitter"
         expiration_date += datetime.timedelta(days=14)
@@ -418,7 +420,7 @@ def generate_issue_ballot_mail(request, doc, ballot):
     
     e = doc.latest_event(LastCallDocEvent, type="sent_last_call")
     last_call_expires = e.expires if e else None
-    last_call_has_expired = last_call_expires and last_call_expires < datetime.datetime.now()
+    last_call_has_expired = last_call_expires and last_call_expires < timezone.now()
 
     return render_to_string("doc/mail/issue_iesg_ballot_mail.txt",
                             dict(doc=doc,
@@ -437,7 +439,7 @@ def _send_irsg_ballot_email(request, doc, ballot, subject, template):
     (to, cc) = gather_address_lists('irsg_ballot_issued', doc=doc)
     sender = 'IESG Secretary <iesg-secretary@ietf.org>'
 
-    ballot_expired = ballot.duedate < datetime.datetime.now()
+    ballot_expired = ballot.duedate < timezone.now()
     active_ballot = doc.active_ballot()
     if active_ballot is None:
         needed_bps = ''

ietf/doc/management/commands/generate_draft_aliases.py

@@ -16,6 +16,7 @@ from tempfile import mkstemp
     
 from django.conf import settings
 from django.core.management.base import BaseCommand
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -101,7 +102,7 @@ class Command(BaseCommand):
             'that have seen activity in the last %s years.' % (DEFAULT_YEARS))
 
     def handle(self, *args, **options):
-        show_since = datetime.datetime.now() - datetime.timedelta(DEFAULT_YEARS*365)
+        show_since = timezone.now() - datetime.timedelta(DEFAULT_YEARS*365)
 
         date = time.strftime("%Y-%m-%d_%H:%M:%S")
         signature = '# Generated by %s at %s\n' % (os.path.abspath(__file__), date)

ietf/doc/management/commands/generate_draft_bibxml_files.py

@@ -10,6 +10,7 @@ import sys
 
 from django.conf import settings
 from django.core.management.base import BaseCommand
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -68,7 +69,7 @@ class Command(BaseCommand):
         if process_all:
             doc_events = NewRevisionDocEvent.objects.filter(type='new_revision', doc__type_id='draft')
         else:
-            start = datetime.datetime.now() - datetime.timedelta(days=days)
+            start = timezone.now() - datetime.timedelta(days=days)
             doc_events = NewRevisionDocEvent.objects.filter(type='new_revision', doc__type_id='draft', time__gte=start)
         doc_events = doc_events.order_by('time')
 

ietf/doc/migrations/0046_use_timezone_now_for_doc_models.py

@@ -0,0 +1,39 @@
+# Generated by Django 2.2.28 on 2022-07-12 11:24
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('doc', '0045_docstates_chatlogs_polls'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='deletedevent',
+            name='time',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AlterField(
+            model_name='docevent',
+            name='time',
+            field=models.DateTimeField(db_index=True, default=django.utils.timezone.now, help_text='When the event happened'),
+        ),
+        migrations.AlterField(
+            model_name='dochistory',
+            name='time',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AlterField(
+            model_name='document',
+            name='time',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AlterField(
+            model_name='documentactionholder',
+            name='time_added',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+    ]

ietf/doc/migrations/0047_tzaware_deletedevents.py

@@ -0,0 +1,61 @@
+# Generated by Django 2.2.28 on 2022-08-31 20:26
+
+import datetime
+import json
+
+from zoneinfo import ZoneInfo
+
+from django.db import migrations
+
+
+TZ_BEFORE = ZoneInfo('PST8PDT')
+
+
+def forward(apps, schema_editor):
+    DeletedEvent = apps.get_model('doc', 'DeletedEvent')
+    for deleted_event in DeletedEvent.objects.all():
+        fields = json.loads(deleted_event.json)
+        replacements = {}
+        for k, v in fields.items():
+            if isinstance(v, str):
+                try:
+                    dt = datetime.datetime.strptime(v, '%Y-%m-%d %H:%M:%S')
+                except:
+                    pass
+                else:
+                    replacements[k] = dt.replace(tzinfo=TZ_BEFORE).astimezone(datetime.timezone.utc).isoformat()
+        if len(replacements) > 0:
+            fields.update(replacements)
+            deleted_event.json = json.dumps(fields)
+            deleted_event.save()
+
+
+def reverse(apps, schema_editor):
+    DeletedEvent = apps.get_model('doc', 'DeletedEvent')
+    for deleted_event in DeletedEvent.objects.all():
+        fields = json.loads(deleted_event.json)
+        replacements = {}
+        for k, v in fields.items():
+            if isinstance(v, str) and 'T' in v:
+                try:
+                    dt = datetime.datetime.fromisoformat(v)
+                except:
+                    pass
+                else:
+                    replacements[k] = dt.astimezone(TZ_BEFORE).replace(tzinfo=None).strftime('%Y-%m-%d %H:%M:%S')
+        if len(replacements) > 0:
+            fields.update(replacements)
+            deleted_event.json = json.dumps(fields)
+            deleted_event.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('doc', '0046_use_timezone_now_for_doc_models'),
+        ('utils', '0003_pause_to_change_use_tz'),
+    ]
+
+    operations = [
+        migrations.RunPython(forward, reverse),
+    ]

ietf/doc/models.py

@@ -18,6 +18,7 @@ from django.core.validators import URLValidator, RegexValidator
 from django.urls import reverse as urlreverse
 from django.contrib.contenttypes.models import ContentType
 from django.conf import settings
+from django.utils import timezone
 from django.utils.encoding import force_text
 from django.utils.html import mark_safe # type:ignore
 
@@ -35,6 +36,7 @@ from ietf.utils.decorators import memoize
 from ietf.utils.validators import validate_no_control_chars
 from ietf.utils.mail import formataddr
 from ietf.utils.models import ForeignKey
+from ietf.utils.timezone import date_today, RPC_TZINFO, DEADLINE_TZINFO
 if TYPE_CHECKING:
     # importing other than for type checking causes errors due to cyclic imports
     from ietf.meeting.models import ProceedingsMaterial, Session
@@ -85,7 +87,7 @@ IESG_SUBSTATE_TAGS = ('ad-f-up', 'need-rev', 'extpty')
 
 class DocumentInfo(models.Model):
     """Any kind of document.  Draft, RFC, Charter, IPR Statement, Liaison Statement"""
-    time = models.DateTimeField(default=datetime.datetime.now) # should probably have auto_now=True
+    time = models.DateTimeField(default=timezone.now) # should probably have auto_now=True
 
     type = ForeignKey(DocTypeName, blank=True, null=True) # Draft, Agenda, Minutes, Charter, Discuss, Guideline, Email, Review, Issue, Wiki, External ...
     title = models.CharField(max_length=255, validators=[validate_no_control_chars, ])
@@ -349,7 +351,7 @@ class DocumentInfo(models.Model):
                     elif iesg_state.slug == "lc":
                         e = self.latest_event(LastCallDocEvent, type="sent_last_call")
                         if e:
-                            return iesg_state_summary + " (ends %s)" % e.expires.date().isoformat()
+                            return iesg_state_summary + " (ends %s)" % e.expires.astimezone(DEADLINE_TZINFO).date().isoformat()
     
                     return iesg_state_summary
                 else:
@@ -682,7 +684,7 @@ class DocumentActionHolder(models.Model):
     """Action holder for a document"""
     document = ForeignKey('Document')
     person = ForeignKey(Person)
-    time_added = models.DateTimeField(default=datetime.datetime.now)
+    time_added = models.DateTimeField(default=timezone.now)
 
     CLEAR_ACTION_HOLDERS_STATES = ['approved', 'ann', 'rfcqueue', 'pub', 'dead']  # draft-iesg state slugs
     GROUP_ROLES_OF_INTEREST = ['chair', 'techadv', 'editor', 'secr']
@@ -829,16 +831,20 @@ class Document(DocumentInfo):
     def telechat_date(self, e=None):
         if not e:
             e = self.latest_event(TelechatDocEvent, type="scheduled_for_telechat")
-        return e.telechat_date if e and e.telechat_date and e.telechat_date >= datetime.date.today() else None
+        return e.telechat_date if e and e.telechat_date and e.telechat_date >= date_today(settings.TIME_ZONE) else None
 
     def past_telechat_date(self):
         "Return the latest telechat date if it isn't in the future; else None"
         e = self.latest_event(TelechatDocEvent, type="scheduled_for_telechat")
-        return e.telechat_date if e and e.telechat_date and e.telechat_date < datetime.date.today() else None
+        return e.telechat_date if e and e.telechat_date and e.telechat_date < date_today(settings.TIME_ZONE) else None
 
     def previous_telechat_date(self):
         "Return the most recent telechat date in the past, if any (even if there's another in the future)"
-        e = self.latest_event(TelechatDocEvent, type="scheduled_for_telechat", telechat_date__lt=datetime.datetime.now())
+        e = self.latest_event(
+            TelechatDocEvent,
+            type="scheduled_for_telechat",
+            telechat_date__lt=date_today(settings.TIME_ZONE),
+        )
         return e.telechat_date if e else None
 
     def request_closed_time(self, review_req):
@@ -904,14 +910,21 @@ class Document(DocumentInfo):
     def future_presentations(self):
         """ returns related SessionPresentation objects for meetings that
             have not yet ended. This implementation allows for 2 week meetings """
-        candidate_presentations = self.sessionpresentation_set.filter(session__meeting__date__gte=datetime.date.today()-datetime.timedelta(days=15))
-        return sorted([pres for pres in candidate_presentations if pres.session.meeting.end_date()>=datetime.date.today()], key=lambda x:x.session.meeting.date)
+        candidate_presentations = self.sessionpresentation_set.filter(
+            session__meeting__date__gte=date_today() - datetime.timedelta(days=15)
+        )
+        return sorted(
+            [pres for pres in candidate_presentations
+             if pres.session.meeting.end_date() >= date_today()],
+            key=lambda x:x.session.meeting.date,
+        )
 
     def last_presented(self):
         """ returns related SessionPresentation objects for the most recent meeting in the past"""
         # Assumes no two meetings have the same start date - if the assumption is violated, one will be chosen arbitrariy
-        candidate_presentations = self.sessionpresentation_set.filter(session__meeting__date__lte=datetime.date.today())
-        candidate_meetings = set([p.session.meeting for p in candidate_presentations if p.session.meeting.end_date()<datetime.date.today()])
+        today = date_today()
+        candidate_presentations = self.sessionpresentation_set.filter(session__meeting__date__lte=today)
+        candidate_meetings = set([p.session.meeting for p in candidate_presentations if p.session.meeting.end_date()<today])
         if candidate_meetings:
             mtg = sorted(list(candidate_meetings),key=lambda x:x.date,reverse=True)[0]
             return self.sessionpresentation_set.filter(session__meeting=mtg)
@@ -924,13 +937,18 @@ class Document(DocumentInfo):
         return s
 
     def pub_date(self):
-        """This is the rfc publication date (datetime) for RFCs, 
-        and the new-revision datetime for other documents."""
+        """Get the publication date for this document
+
+        This is the rfc publication date for RFCs, and the new-revision date for other documents.
+        """
         if self.get_state_slug() == "rfc":
+            # As of Sept 2022, in ietf.sync.rfceditor.update_docs_from_rfc_index() `published_rfc` events are
+            # created with a timestamp whose date *in the PST8PDT timezone* is the official publication date
+            # assigned by the RFC editor.
             event = self.latest_event(type='published_rfc')
         else:
             event = self.latest_event(type='new_revision')
-        return event.time
+        return event.time.astimezone(RPC_TZINFO).date() if event else None
 
     def is_dochistory(self):
         return False
@@ -955,7 +973,7 @@ class Document(DocumentInfo):
             elif rev_events.exists():
                 time = rev_events.first().time
             else:
-                time = datetime.datetime.fromtimestamp(0)
+                time = datetime.datetime.fromtimestamp(0, datetime.timezone.utc)
             dh = DocHistory(name=self.name, rev=rev, doc=self, time=time, type=self.type, title=self.title,
                              stream=self.stream, group=self.group)
 
@@ -1208,7 +1226,7 @@ EVENT_TYPES = [
 
 class DocEvent(models.Model):
     """An occurrence for a document, used for tracking who, when and what."""
-    time = models.DateTimeField(default=datetime.datetime.now, help_text="When the event happened", db_index=True)
+    time = models.DateTimeField(default=timezone.now, help_text="When the event happened", db_index=True)
     type = models.CharField(max_length=50, choices=EVENT_TYPES)
     by = ForeignKey(Person)
     doc = ForeignKey(Document)
@@ -1388,7 +1406,7 @@ class DeletedEvent(models.Model):
     content_type = ForeignKey(ContentType)
     json = models.TextField(help_text="Deleted object in JSON format, with attribute names chosen to be suitable for passing into the relevant create method.")
     by = ForeignKey(Person)
-    time = models.DateTimeField(default=datetime.datetime.now)
+    time = models.DateTimeField(default=timezone.now)
 
     def __str__(self):
         return u"%s by %s %s" % (self.content_type, self.by, self.time)

ietf/doc/templatetags/ballot_icon.py

@@ -38,6 +38,7 @@ import debug      # pyflakes:ignore
 from django import template
 from django.urls import reverse as urlreverse
 from django.db.models import Q
+from django.utils import timezone
 from django.utils.safestring import mark_safe
 
 from ietf.ietfauth.utils import user_is_person, has_role
@@ -173,17 +174,17 @@ def state_age_colored(doc):
         if iesg_state in ["dead", "watching", "pub", "idexists"]:
             return ""
         try:
-            state_date = (
+            state_datetime = (
                 doc.docevent_set.filter(
                     Q(type="started_iesg_process")
                     | Q(type="changed_state", statedocevent__state_type="draft-iesg")
                 )
                 .order_by("-time")[0]
-                .time.date()
+                .time
             )
         except IndexError:
-            state_date = datetime.date(1990, 1, 1)
-        days = (datetime.date.today() - state_date).days
+            state_datetime = datetime.datetime(1990, 1, 1, tzinfo=datetime.timezone.utc)
+        days = (timezone.now() - state_datetime).days
         # loosely based on
         # https://trac.ietf.org/trac/iesg/wiki/PublishPath
         if iesg_state == "lc":

ietf/doc/templatetags/ietf_filters.py

@@ -18,6 +18,7 @@ from django.urls import reverse as urlreverse
 from django.core.cache import cache
 from django.core.exceptions import ValidationError
 from django.urls import NoReverseMatch
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -318,7 +319,7 @@ def timesince_days(date):
     """Returns the number of days since 'date' (relative to now)"""
     if date.__class__ is not datetime.datetime:
         date = datetime.datetime(date.year, date.month, date.day)
-    delta = datetime.datetime.now() - date
+    delta = timezone.now() - date
     return delta.days
 
 @register.filter
@@ -501,6 +502,36 @@ def ics_esc(text):
     text = re.sub(r"([\n,;\\])", r"\\\1", text)
     return text
 
+
+@register.simple_tag
+def ics_date_time(dt, tzname):
+    """Render a datetime as an iCalendar date-time
+
+    dt a datetime, localized to the timezone to be displayed
+    tzname is the name for this timezone
+
+    Caller must arrange for a VTIMEZONE for the tzname to be included in the iCalendar file.
+    Output includes a ':'. Use like:
+      DTSTART{% ics_date_time timestamp 'America/Los_Angeles' %}
+    to get
+      DTSTART;TZID=America/Los_Angeles:20221021T111200
+
+    >>> ics_date_time(datetime.datetime(2022,1,2,3,4,5), 'utc')
+    ':20220102T030405Z'
+
+    >>> ics_date_time(datetime.datetime(2022,1,2,3,4,5), 'UTC')
+    ':20220102T030405Z'
+
+    >>> ics_date_time(datetime.datetime(2022,1,2,3,4,5), 'America/Los_Angeles')
+    ';TZID=America/Los_Angeles:20220102T030405'
+    """
+    timestamp = dt.strftime('%Y%m%dT%H%M%S')
+    if tzname.lower() == 'utc':
+        return f':{timestamp}Z'
+    else:
+        return f';TZID={ics_esc(tzname)}:{timestamp}'
+
+
 @register.filter
 def consensus(doc):
     """Returns document consensus Yes/No/Unknown."""
@@ -637,19 +668,19 @@ def action_holder_badge(action_holder):
     >>> action_holder_badge(DocumentActionHolderFactory())
     ''
 
-    >>> action_holder_badge(DocumentActionHolderFactory(time_added=datetime.datetime.now() - datetime.timedelta(days=15)))
+    >>> action_holder_badge(DocumentActionHolderFactory(time_added=timezone.now() - datetime.timedelta(days=15)))
     ''
 
-    >>> action_holder_badge(DocumentActionHolderFactory(time_added=datetime.datetime.now() - datetime.timedelta(days=16)))
+    >>> action_holder_badge(DocumentActionHolderFactory(time_added=timezone.now() - datetime.timedelta(days=16)))
     '<span class="badge rounded-pill bg-danger" title="In state for 16 days; goal is &lt;15 days."><i class="bi bi-clock-fill"></i> 16</span>'
 
-    >>> action_holder_badge(DocumentActionHolderFactory(time_added=datetime.datetime.now() - datetime.timedelta(days=30)))
+    >>> action_holder_badge(DocumentActionHolderFactory(time_added=timezone.now() - datetime.timedelta(days=30)))
     '<span class="badge rounded-pill bg-danger" title="In state for 30 days; goal is &lt;15 days."><i class="bi bi-clock-fill"></i> 30</span>'
 
     >>> settings.DOC_ACTION_HOLDER_AGE_LIMIT_DAYS = old_limit
     """
     age_limit = settings.DOC_ACTION_HOLDER_AGE_LIMIT_DAYS
-    age = (datetime.datetime.now() - action_holder.time_added).days
+    age = (timezone.now() - action_holder.time_added).days
     if age > age_limit:
         return mark_safe(
             '<span class="badge rounded-pill bg-danger" title="In state for %d day%s; goal is &lt;%d days."><i class="bi bi-clock-fill"></i> %d</span>'

ietf/doc/tests.py

@@ -18,6 +18,7 @@ from pyquery import PyQuery
 from urllib.parse import urlparse, parse_qs
 from tempfile import NamedTemporaryFile
 from collections import defaultdict
+from zoneinfo import ZoneInfo
 
 from django.core.management import call_command
 from django.urls import reverse as urlreverse
@@ -25,6 +26,7 @@ from django.conf import settings
 from django.forms import Form
 from django.utils.html import escape
 from django.test import override_settings
+from django.utils import timezone
 from django.utils.text import slugify
 
 from tastypie.test import ResourceTestCaseMixin
@@ -56,6 +58,8 @@ from ietf.utils.mail import outbox, empty_outbox
 from ietf.utils.test_utils import login_testing_unauthorized, unicontent, reload_db_objects
 from ietf.utils.test_utils import TestCase
 from ietf.utils.text import normalize_text
+from ietf.utils.timezone import date_today, datetime_today, DEADLINE_TZINFO, RPC_TZINFO
+
 
 class SearchTests(TestCase):
     def test_search(self):
@@ -385,13 +389,13 @@ class SearchTests(TestCase):
         # Three drafts to show with various warnings
         drafts = WgDraftFactory.create_batch(3,states=[('draft','active'),('draft-iesg','ad-eval')])
         for index, draft in enumerate(drafts):
-            StateDocEventFactory(doc=draft, state=('draft-iesg','ad-eval'), time=datetime.datetime.now()-datetime.timedelta(days=[1,15,29][index]))
+            StateDocEventFactory(doc=draft, state=('draft-iesg','ad-eval'), time=timezone.now()-datetime.timedelta(days=[1,15,29][index]))
             draft.action_holders.set([PersonFactory()])
 
         # And one draft that should not show (with the default of 7 days to view)
         old = WgDraftFactory()
-        old.docevent_set.filter(newrevisiondocevent__isnull=False).update(time=datetime.datetime.now()-datetime.timedelta(days=8))
-        StateDocEventFactory(doc=old, time=datetime.datetime.now()-datetime.timedelta(days=8))
+        old.docevent_set.filter(newrevisiondocevent__isnull=False).update(time=timezone.now()-datetime.timedelta(days=8))
+        StateDocEventFactory(doc=old, time=timezone.now()-datetime.timedelta(days=8))
 
         url = urlreverse('ietf.doc.views_search.recent_drafts')
         r = self.client.get(url)
@@ -764,7 +768,7 @@ Man                    Expires September 22, 2015               [Page 3]
 
         replacement = WgDraftFactory(
             name="draft-ietf-replacement",
-            time=datetime.datetime.now(),
+            time=timezone.now(),
             title="Replacement Draft",
             stream_id=draft.stream_id, group_id=draft.group_id, abstract=draft.abstract,stream=draft.stream, rev=draft.rev,
             pages=draft.pages, intended_std_level_id=draft.intended_std_level_id,
@@ -1427,6 +1431,8 @@ Man                    Expires September 22, 2015               [Page 3]
 
     def test_draft_group_link(self):
         """Link to group 'about' page should have correct format"""
+        event_datetime = datetime.datetime(2010, 10, 10, tzinfo=RPC_TZINFO)
+
         for group_type_id in ['wg', 'rg', 'ag']:
             group = GroupFactory(type_id=group_type_id)
             draft = WgDraftFactory(name='draft-document-%s' % group_type_id, group=group)
@@ -1435,7 +1441,7 @@ Man                    Expires September 22, 2015               [Page 3]
             self.assert_correct_wg_group_link(r, group)
 
             rfc = WgRfcFactory(name='draft-rfc-document-%s' % group_type_id, group=group)
-            DocEventFactory.create(doc=rfc, type='published_rfc', time = '2010-10-10')
+            DocEventFactory.create(doc=rfc, type='published_rfc', time=event_datetime)
             # get the rfc name to avoid a redirect
             rfc_name = rfc.docalias.filter(name__startswith='rfc').first().name
             r = self.client.get(urlreverse("ietf.doc.views_doc.document_main", kwargs=dict(name=rfc_name)))
@@ -1450,7 +1456,7 @@ Man                    Expires September 22, 2015               [Page 3]
             self.assert_correct_non_wg_group_link(r, group)
 
             rfc = WgRfcFactory(name='draft-rfc-document-%s' % group_type_id, group=group)
-            DocEventFactory.create(doc=rfc, type='published_rfc', time = '2010-10-10')
+            DocEventFactory.create(doc=rfc, type='published_rfc', time=event_datetime)
             # get the rfc name to avoid a redirect
             rfc_name = rfc.docalias.filter(name__startswith='rfc').first().name
             r = self.client.get(urlreverse("ietf.doc.views_doc.document_main", kwargs=dict(name=rfc_name)))
@@ -1586,7 +1592,7 @@ class DocTestCase(TestCase):
             name = "session-72-mars-1",
             meeting = Meeting.objects.get(number='72'),
             group = Group.objects.get(acronym='mars'),
-            modified = datetime.datetime.now(),
+            modified = timezone.now(),
             add_to_schedule=False,
         )
         SchedulingEvent.objects.create(
@@ -1616,7 +1622,7 @@ class DocTestCase(TestCase):
             type="changed_ballot_position",
             pos_id="yes",
             comment="Looks fine to me",
-            comment_time=datetime.datetime.now(),
+            comment_time=timezone.now(),
             balloter=Person.objects.get(user__username="ad"),
             by=Person.objects.get(name="(System)"))
 
@@ -1650,7 +1656,7 @@ class DocTestCase(TestCase):
             type="changed_ballot_position",
             pos_id="noobj",
             comment="Still looks okay to me",
-            comment_time=datetime.datetime.now(),
+            comment_time=timezone.now(),
             balloter=Person.objects.get(user__username="ad"),
             by=Person.objects.get(name="(System)"))
 
@@ -1672,7 +1678,7 @@ class DocTestCase(TestCase):
                 type="changed_ballot_position",
                 pos_id="yes",
                 comment="Looks fine to me",
-                comment_time=datetime.datetime.now(),
+                comment_time=timezone.now(),
                 balloter=Person.objects.get(user__username="ad"),
                 by=Person.objects.get(name="(System)"))
 
@@ -1842,7 +1848,7 @@ class DocTestCase(TestCase):
             desc="Last call\x0b",  # include a control character to be sure it does not break anything
             type="sent_last_call",
             by=Person.objects.get(user__username="secretary"),
-            expires=datetime.date.today() + datetime.timedelta(days=7))
+            expires=datetime_today(DEADLINE_TZINFO) + datetime.timedelta(days=7))
 
         r = self.client.get("/feed/last-call/")
         self.assertEqual(r.status_code, 200)
@@ -1890,10 +1896,14 @@ class DocTestCase(TestCase):
                   #other_aliases = ['rfc6020',],
                   states = [('draft','rfc'),('draft-iesg','pub')],
                   std_level_id = 'ps',
-                  time = datetime.datetime(2010,10,10),
+                  time = datetime.datetime(2010, 10, 10, tzinfo=ZoneInfo(settings.TIME_ZONE)),
               )
         num = rfc.rfc_number()
-        DocEventFactory.create(doc=rfc, type='published_rfc', time = '2010-10-10')
+        DocEventFactory.create(
+            doc=rfc,
+            type='published_rfc',
+            time=datetime.datetime(2010, 10, 10, tzinfo=RPC_TZINFO),
+        )
         #
         url = urlreverse('ietf.doc.views_doc.document_bibtex', kwargs=dict(name=rfc.name))
         r = self.client.get(url)
@@ -1911,10 +1921,14 @@ class DocTestCase(TestCase):
                   stream_id =       'ise',
                   states =          [('draft','rfc'),('draft-iesg','pub')],
                   std_level_id =    'inf',
-                  time =            datetime.datetime(1990,0o4,0o1),
+                  time =            datetime.datetime(1990, 4, 1, tzinfo=ZoneInfo(settings.TIME_ZONE)),
               )
         num = april1.rfc_number()
-        DocEventFactory.create(doc=april1, type='published_rfc', time = '1990-04-01')
+        DocEventFactory.create(
+            doc=april1,
+            type='published_rfc',
+            time=datetime.datetime(1990, 4, 1, tzinfo=RPC_TZINFO),
+        )
         #
         url = urlreverse('ietf.doc.views_doc.document_bibtex', kwargs=dict(name=april1.name))
         r = self.client.get(url)
@@ -2049,7 +2063,8 @@ class GenerateDraftAliasesTests(TestCase):
        super().tearDown()
 
    def testManagementCommand(self):
-       a_month_ago = datetime.datetime.now() - datetime.timedelta(30)
+       a_month_ago = (timezone.now() - datetime.timedelta(30)).astimezone(RPC_TZINFO)
+       a_month_ago = a_month_ago.replace(hour=0, minute=0, second=0, microsecond=0)
        ad = RoleFactory(name_id='ad', group__type_id='area', group__state_id='active').person
        shepherd = PersonFactory()
        author1 = PersonFactory()
@@ -2064,9 +2079,9 @@ class GenerateDraftAliasesTests(TestCase):
        doc1 = IndividualDraftFactory(authors=[author1], shepherd=shepherd.email(), ad=ad)
        doc2 = WgDraftFactory(name='draft-ietf-mars-test', group__acronym='mars', authors=[author2], ad=ad)
        doc3 = WgRfcFactory.create(name='draft-ietf-mars-finished', group__acronym='mars', authors=[author3], ad=ad, std_level_id='ps', states=[('draft','rfc'),('draft-iesg','pub')], time=a_month_ago)
-       DocEventFactory.create(doc=doc3, type='published_rfc', time=a_month_ago.strftime("%Y-%m-%d"))
-       doc4 = WgRfcFactory.create(authors=[author4,author5], ad=ad, std_level_id='ps', states=[('draft','rfc'),('draft-iesg','pub')], time=datetime.datetime(2010,10,10))
-       DocEventFactory.create(doc=doc4, type='published_rfc', time = '2010-10-10')
+       DocEventFactory.create(doc=doc3, type='published_rfc', time=a_month_ago)
+       doc4 = WgRfcFactory.create(authors=[author4,author5], ad=ad, std_level_id='ps', states=[('draft','rfc'),('draft-iesg','pub')], time=datetime.datetime(2010,10,10, tzinfo=ZoneInfo(settings.TIME_ZONE)))
+       DocEventFactory.create(doc=doc4, type='published_rfc', time=datetime.datetime(2010, 10, 10, tzinfo=RPC_TZINFO))
        doc5 = IndividualDraftFactory(authors=[author6])
 
        args = [ ]
@@ -2217,7 +2232,7 @@ class DocumentMeetingTests(TestCase):
         self.other_chair = PersonFactory()
         self.other_group.role_set.create(name_id='chair',person=self.other_chair,email=self.other_chair.email())
 
-        today = datetime.date.today()
+        today = date_today()
         cut_days = settings.MEETING_MATERIALS_DEFAULT_SUBMISSION_CORRECTION_DAYS
         self.past_cutoff = SessionFactory.create(meeting__type_id='ietf',group=self.group,meeting__date=today-datetime.timedelta(days=1+cut_days))
         self.past = SessionFactory.create(meeting__type_id='ietf',group=self.group,meeting__date=today-datetime.timedelta(days=cut_days/2))

ietf/doc/tests_ballot.py

@@ -12,6 +12,7 @@ import debug                            # pyflakes:ignore
 from django.test import RequestFactory
 from django.utils.text import slugify
 from django.urls import reverse as urlreverse
+from django.utils import timezone
 
 from ietf.doc.models import (Document, State, DocEvent,
                              BallotPositionDocEvent, LastCallDocEvent, WriteupDocEvent, TelechatDocEvent)
@@ -30,6 +31,7 @@ from ietf.person.utils import get_active_ads
 from ietf.utils.test_utils import TestCase, login_testing_unauthorized
 from ietf.utils.mail import outbox, empty_outbox, get_payload_text
 from ietf.utils.text import unwrap
+from ietf.utils.timezone import date_today
 
 
 class EditPositionTests(TestCase):
@@ -105,7 +107,7 @@ class EditPositionTests(TestCase):
         draft = WgDraftFactory(ad=ad)
         url = urlreverse('ietf.doc.views_ballot.api_set_position')
         create_ballot_if_not_open(None, draft, ad, 'approve')
-        ad.user.last_login = datetime.datetime.now()
+        ad.user.last_login = timezone.now()
         ad.user.save()
         apikey = PersonalApiKey.objects.create(endpoint=url, person=ad)
 
@@ -238,9 +240,9 @@ class EditPositionTests(TestCase):
             doc=draft, rev=draft.rev, type="changed_ballot_position",
             by=ad, balloter=ad, ballot=ballot, pos=BallotPositionName.objects.get(slug="discuss"),
             discuss="This draft seems to be lacking a clearer title?",
-            discuss_time=datetime.datetime.now(),
+            discuss_time=timezone.now(),
             comment="Test!",
-            comment_time=datetime.datetime.now())
+            comment_time=timezone.now())
         
         url = urlreverse('ietf.doc.views_ballot.send_ballot_comment', kwargs=dict(name=draft.name,
                                                                 ballot_id=ballot.pk))
@@ -466,7 +468,7 @@ class BallotWriteupsTests(TestCase):
                     doc=draft,
                     rev=draft.rev,
                     desc='issued last call',
-                    expires = datetime.datetime.now()+datetime.timedelta(days = 1 if case=='future' else -1)
+                    expires = timezone.now()+datetime.timedelta(days = 1 if case=='future' else -1)
                 )
             url = urlreverse('ietf.doc.views_ballot.ballot_writeupnotes', kwargs=dict(name=draft.name))
             login_testing_unauthorized(self, "ad", url)
@@ -791,7 +793,7 @@ class ApproveBallotTests(TestCase):
                   doc=draft,
                   rev=draft.rev,
                   desc='issued last call',
-                  expires = datetime.datetime.now()-datetime.timedelta(days=14) )
+                  expires = timezone.now()-datetime.timedelta(days=14) )
         WriteupDocEvent.objects.create(
                   by=Person.objects.get(name='(System)'),
                   doc=draft,
@@ -898,7 +900,7 @@ class MakeLastCallTests(TestCase):
 
         mailbox_before = len(outbox)
 
-        last_call_sent_date = datetime.date.today()
+        last_call_sent_date = date_today()
         expire_date = last_call_sent_date+datetime.timedelta(days=14)
         
         r = self.client.post(url,
@@ -1117,7 +1119,7 @@ class RegenerateLastCallTestCase(TestCase):
 
 class BallotContentTests(TestCase):
     def test_ballotpositiondocevent_any_email_sent(self):
-        now = datetime.datetime.now()  # be sure event timestamps are at distinct times
+        now = timezone.now()  # be sure event timestamps are at distinct times
         bpde_with_null_send_email = BallotPositionDocEventFactory(
             time=now - datetime.timedelta(minutes=30),
             send_email=None,
@@ -1219,7 +1221,7 @@ class BallotContentTests(TestCase):
             balloter=balloters[0],
             pos_id='discuss',
             discuss='Discussion text',
-            discuss_time=datetime.datetime.now(),
+            discuss_time=timezone.now(),
             send_email=True,
         )
         BallotPositionDocEventFactory(
@@ -1227,7 +1229,7 @@ class BallotContentTests(TestCase):
             balloter=balloters[1],
             pos_id='noobj',
             comment='Commentary',
-            comment_time=datetime.datetime.now(),
+            comment_time=timezone.now(),
             send_email=True,
         )
 
@@ -1237,7 +1239,7 @@ class BallotContentTests(TestCase):
             balloter=balloters[2],
             pos_id='discuss',
             discuss='Discussion text',
-            discuss_time=datetime.datetime.now(),
+            discuss_time=timezone.now(),
             send_email=False,
         )
         BallotPositionDocEventFactory(
@@ -1245,7 +1247,7 @@ class BallotContentTests(TestCase):
             balloter=balloters[3],
             pos_id='noobj',
             comment='Commentary',
-            comment_time=datetime.datetime.now(),
+            comment_time=timezone.now(),
             send_email=False,
         )
 
@@ -1255,7 +1257,7 @@ class BallotContentTests(TestCase):
             balloter=balloters[4],
             pos_id='discuss',
             discuss='Discussion text',
-            discuss_time=datetime.datetime.now() - datetime.timedelta(days=1),
+            discuss_time=timezone.now() - datetime.timedelta(days=1),
             send_email=True,
         )
         BallotPositionDocEventFactory(
@@ -1263,7 +1265,7 @@ class BallotContentTests(TestCase):
             balloter=balloters[4],
             pos_id='discuss',
             discuss='Discussion text',
-            discuss_time=datetime.datetime.now(),
+            discuss_time=timezone.now(),
             send_email=False,
         )
         BallotPositionDocEventFactory(
@@ -1271,7 +1273,7 @@ class BallotContentTests(TestCase):
             balloter=balloters[5],
             pos_id='noobj',
             comment='Commentary',
-            comment_time=datetime.datetime.now() - datetime.timedelta(days=1),
+            comment_time=timezone.now() - datetime.timedelta(days=1),
             send_email=True,
         )
         BallotPositionDocEventFactory(
@@ -1279,7 +1281,7 @@ class BallotContentTests(TestCase):
             balloter=balloters[5],
             pos_id='noobj',
             comment='Commentary',
-            comment_time=datetime.datetime.now(),
+            comment_time=timezone.now(),
             send_email=False,
         )
 
@@ -1296,7 +1298,7 @@ class BallotContentTests(TestCase):
             balloter__plain='plain name1',
             pos_id='discuss',
             discuss='Discussion text',
-            discuss_time=datetime.datetime.now(),
+            discuss_time=timezone.now(),
             send_email=False,
         ).balloter
         send_email_balloter = BallotPositionDocEventFactory(
@@ -1304,7 +1306,7 @@ class BallotContentTests(TestCase):
             balloter__plain='plain name2',
             pos_id='discuss',
             discuss='Discussion text',
-            discuss_time=datetime.datetime.now(),
+            discuss_time=timezone.now(),
             send_email=True,
         ).balloter
         prev_send_email_balloter = BallotPositionDocEventFactory(
@@ -1312,7 +1314,7 @@ class BallotContentTests(TestCase):
             balloter__plain='plain name3',
             pos_id='discuss',
             discuss='Discussion text',
-            discuss_time=datetime.datetime.now() - datetime.timedelta(days=1),
+            discuss_time=timezone.now() - datetime.timedelta(days=1),
             send_email=True,
         ).balloter
         BallotPositionDocEventFactory(
@@ -1320,7 +1322,7 @@ class BallotContentTests(TestCase):
             balloter=prev_send_email_balloter,
             pos_id='discuss',
             discuss='Discussion text',
-            discuss_time=datetime.datetime.now(),
+            discuss_time=timezone.now(),
             send_email=False,
         )
 
@@ -1351,7 +1353,7 @@ class BallotContentTests(TestCase):
             balloter=balloters[0],
             pos_id='discuss',
             discuss='Discussion text',
-            discuss_time=datetime.datetime.now(),
+            discuss_time=timezone.now(),
             send_email=None,
         )
         BallotPositionDocEventFactory(
@@ -1359,7 +1361,7 @@ class BallotContentTests(TestCase):
             balloter=balloters[1],
             pos_id='noobj',
             comment='Commentary',
-            comment_time=datetime.datetime.now(),
+            comment_time=timezone.now(),
             send_email=None,
         )
         old_balloter = BallotPositionDocEventFactory(
@@ -1367,7 +1369,7 @@ class BallotContentTests(TestCase):
             balloter__plain='plain name',  # ensure plain name is slugifiable
             pos_id='discuss',
             discuss='Discussion text',
-            discuss_time=datetime.datetime.now(),
+            discuss_time=timezone.now(),
             send_email=None,
         ).balloter
 

ietf/doc/tests_bofreq.py

@@ -14,6 +14,7 @@ from html import unescape
 from django.conf import settings
 from django.urls import reverse as urlreverse
 from django.template.loader import render_to_string
+from django.utils import timezone
 
 from ietf.group.factories import RoleFactory
 from ietf.doc.factories import BofreqFactory, NewRevisionDocEventFactory
@@ -48,7 +49,7 @@ This test section has some text.
         states = State.objects.filter(type_id='bofreq')
         self.assertTrue(states.count()>0)
         for i in range(3*len(states)):
-           BofreqFactory(states=[('bofreq',states[i%len(states)].slug)],newrevisiondocevent__time=datetime.datetime.today()-datetime.timedelta(days=randint(0,20)))
+           BofreqFactory(states=[('bofreq',states[i%len(states)].slug)],newrevisiondocevent__time=timezone.now()-datetime.timedelta(days=randint(0,20)))
         r = self.client.get(url)
         self.assertEqual(r.status_code, 200)
         q = PyQuery(r.content)

ietf/doc/tests_charter.py

@@ -26,6 +26,8 @@ from ietf.person.models import Person
 from ietf.utils.test_utils import TestCase
 from ietf.utils.mail import outbox, empty_outbox, get_payload_text
 from ietf.utils.test_utils import login_testing_unauthorized
+from ietf.utils.timezone import datetime_today, date_today, DEADLINE_TZINFO
+
 
 class ViewCharterTests(TestCase):
     def test_view_revisions(self):
@@ -402,7 +404,7 @@ class EditCharterTests(TestCase):
 
         # Make it so that the charter has been through internal review, and passed its external review
         # ballot on a previous telechat 
-        last_week = datetime.date.today()-datetime.timedelta(days=7)
+        last_week = datetime_today(DEADLINE_TZINFO) - datetime.timedelta(days=7)
         BallotDocEvent.objects.create(type='created_ballot',by=login,doc=charter, rev=charter.rev,
                                       ballot_type=BallotType.objects.get(doc_type=charter.type,slug='r-extrev'),
                                       time=last_week)
@@ -746,7 +748,7 @@ class EditCharterTests(TestCase):
 
         charter.set_state(State.objects.get(used=True, type="charter", slug="iesgrev"))
 
-        due_date = datetime.date.today() + datetime.timedelta(days=180)
+        due_date = date_today(DEADLINE_TZINFO) + datetime.timedelta(days=180)
         m1 = GroupMilestone.objects.create(group=group,
                                            state_id="active",
                                            desc="Has been copied",
@@ -826,7 +828,7 @@ class EditCharterTests(TestCase):
         m = GroupMilestone.objects.create(group=charter.group,
                                           state_id="active",
                                           desc="Test milestone",
-                                          due=datetime.date.today(),
+                                          due=date_today(DEADLINE_TZINFO),
                                           resolved="")
 
         url = urlreverse('ietf.doc.views_charter.charter_with_milestones_txt', kwargs=dict(name=charter.name, rev=charter.rev))

ietf/doc/tests_draft.py

@@ -13,6 +13,7 @@ from pyquery import PyQuery
 
 from django.urls import reverse as urlreverse
 from django.conf import settings
+from django.utils import timezone
 from django.utils.html import escape
 
 import debug                            # pyflakes:ignore
@@ -33,6 +34,7 @@ from ietf.iesg.models import TelechatDate
 from ietf.utils.test_utils import login_testing_unauthorized
 from ietf.utils.mail import outbox, empty_outbox, get_payload_text
 from ietf.utils.test_utils import TestCase
+from ietf.utils.timezone import date_today, datetime_from_date
 
 
 class ChangeStateTests(TestCase):
@@ -401,11 +403,11 @@ class EditInfoTests(TestCase):
 
         # change to a telechat that should cause returning item to be auto-detected
         # First, make it appear that the previous telechat has already passed
-        telechat_event.telechat_date = datetime.date.today()-datetime.timedelta(days=7)
+        telechat_event.telechat_date = date_today() - datetime.timedelta(days=7)
         telechat_event.save()
         ad = Person.objects.get(user__username="ad")
         ballot = create_ballot_if_not_open(None, draft, ad, 'approve')
-        ballot.time = telechat_event.telechat_date
+        ballot.time = datetime_from_date(telechat_event.telechat_date)
         ballot.save()
 
         r = self.client.post(url, data)
@@ -428,7 +430,7 @@ class EditInfoTests(TestCase):
         self.assertTrue("Telechat update" in outbox[-1]['Subject'])
 
         # Put it on an agenda that's very soon from now
-        next_week = datetime.date.today()+datetime.timedelta(days=7)
+        next_week = date_today() + datetime.timedelta(days=7)
         td =  TelechatDate.objects.active()[0]
         td.date = next_week
         td.save()
@@ -618,7 +620,7 @@ class ResurrectTests(DraftFileMixin, TestCase):
         self.assertEqual(draft.docevent_set.count(), events_before + 1)
         self.assertEqual(draft.latest_event().type, "completed_resurrect")
         self.assertEqual(draft.get_state_slug(), "active")
-        self.assertTrue(draft.expires >= datetime.datetime.now() + datetime.timedelta(days=settings.INTERNET_DRAFT_DAYS_TO_EXPIRE - 1))
+        self.assertTrue(draft.expires >= timezone.now() + datetime.timedelta(days=settings.INTERNET_DRAFT_DAYS_TO_EXPIRE - 1))
         self.assertEqual(len(outbox), mailbox_before + 1)
         self.assertTrue('Resurrection Completed' in outbox[-1]['Subject'])
         self.assertTrue('iesg-secretary' in outbox[-1]['To'])
@@ -638,7 +640,7 @@ class ExpireIDsTests(DraftFileMixin, TestCase):
 
         meeting = Meeting.objects.create(number="123",
                                type=MeetingTypeName.objects.get(slug="ietf"),
-                               date=datetime.date.today())
+                               date=date_today())
         second_cut_off = meeting.get_second_cut_off()
         ietf_monday = meeting.get_ietf_monday()
 
@@ -659,7 +661,7 @@ class ExpireIDsTests(DraftFileMixin, TestCase):
 
         # hack into expirable state
         draft.set_state(State.objects.get(type_id='draft-iesg',slug='idexists'))
-        draft.expires = datetime.datetime.now() + datetime.timedelta(days=10)
+        draft.expires = timezone.now() + datetime.timedelta(days=10)
         draft.save_with_history([DocEvent.objects.create(doc=draft, rev=draft.rev, type="changed_document", by=Person.objects.get(user__username="secretary"), desc="Test")])
 
         self.assertEqual(len(list(get_soon_to_expire_drafts(14))), 1)
@@ -698,7 +700,7 @@ class ExpireIDsTests(DraftFileMixin, TestCase):
         
         # hack into expirable state
         draft.set_state(State.objects.get(type_id='draft-iesg',slug='idexists'))
-        draft.expires = datetime.datetime.now()
+        draft.expires = timezone.now()
         draft.save_with_history([DocEvent.objects.create(doc=draft, rev=draft.rev, type="changed_document", by=Person.objects.get(user__username="secretary"), desc="Test")])
 
         self.assertEqual(len(list(get_expired_drafts())), 1)
@@ -741,7 +743,7 @@ class ExpireIDsTests(DraftFileMixin, TestCase):
 
         draft.delete()
 
-        rgdraft = RgDraftFactory(expires=datetime.datetime.now())
+        rgdraft = RgDraftFactory(expires=timezone.now())
         self.assertEqual(len(list(get_expired_drafts())), 1)
         for slug in ('iesg-rev','irsgpoll'):
             rgdraft.set_state(State.objects.get(type_id='draft-stream-irtf',slug=slug))
@@ -791,7 +793,7 @@ class ExpireIDsTests(DraftFileMixin, TestCase):
 
         # expire draft
         draft.set_state(State.objects.get(used=True, type="draft", slug="expired"))
-        draft.expires = datetime.datetime.now() - datetime.timedelta(days=1)
+        draft.expires = timezone.now() - datetime.timedelta(days=1)
         draft.save_with_history([DocEvent.objects.create(doc=draft, rev=draft.rev, type="changed_document", by=Person.objects.get(user__username="secretary"), desc="Test")])
 
         e = DocEvent(doc=draft, rev=draft.rev, type= "expired_document", time=draft.expires,
@@ -824,7 +826,7 @@ class ExpireLastCallTests(TestCase):
 
         e = LastCallDocEvent(doc=draft, rev=draft.rev, type="sent_last_call", by=secretary)
         e.text = "Last call sent"
-        e.expires = datetime.datetime.now() + datetime.timedelta(days=14)
+        e.expires = timezone.now() + datetime.timedelta(days=14)
         e.save()
         
         self.assertEqual(len(list(get_expired_last_calls())), 0)
@@ -832,7 +834,7 @@ class ExpireLastCallTests(TestCase):
         # test expired
         e = LastCallDocEvent(doc=draft, rev=draft.rev, type="sent_last_call", by=secretary)
         e.text = "Last call sent"
-        e.expires = datetime.datetime.now()
+        e.expires = timezone.now()
         e.save()
         
         drafts = list(get_expired_last_calls())
@@ -866,7 +868,7 @@ class ExpireLastCallTests(TestCase):
         e = LastCallDocEvent(doc=draft, rev=draft.rev, type="sent_last_call", by=secretary)
         e.text = "Last call sent"
         e.desc = "Blah, blah, blah.\n\nThis document makes the following downward references (downrefs):\n  ** Downref: Normative reference to an Experimental RFC: RFC 4764"
-        e.expires = datetime.datetime.now()
+        e.expires = timezone.now()
         e.save()
         
         drafts = list(get_expired_last_calls())
@@ -1730,7 +1732,7 @@ class ChangeStreamStateTests(TestCase):
         self.assertEqual(draft.docevent_set.count() - events_before, 2)
         reminder = DocReminder.objects.filter(event__doc=draft, type="stream-s")
         self.assertEqual(len(reminder), 1)
-        due = datetime.datetime.now() + datetime.timedelta(weeks=10)
+        due = timezone.now() + datetime.timedelta(weeks=10)
         self.assertTrue(due - datetime.timedelta(days=1) <= reminder[0].due <= due + datetime.timedelta(days=1))
         self.assertEqual(len(outbox), 1)
         self.assertTrue("state changed" in outbox[0]["Subject"].lower())
@@ -1775,7 +1777,7 @@ class ChangeStreamStateTests(TestCase):
         self.assertEqual(draft.docevent_set.count() - events_before, 2)
         reminder = DocReminder.objects.filter(event__doc=draft, type="stream-s")
         self.assertEqual(len(reminder), 1)
-        due = datetime.datetime.now() + datetime.timedelta(weeks=10)
+        due = timezone.now() + datetime.timedelta(weeks=10)
         self.assertTrue(due - datetime.timedelta(days=1) <= reminder[0].due <= due + datetime.timedelta(days=1))
         self.assertEqual(len(outbox), 1)
         self.assertTrue("state changed" in outbox[0]["Subject"].lower())
@@ -1826,7 +1828,7 @@ class ChangeReplacesTests(TestCase):
             name="draft-test-base-b",
             title="Base B",
             group=mars_wg,
-            expires = datetime.datetime.now() - datetime.timedelta(days = 365 - settings.INTERNET_DRAFT_DAYS_TO_EXPIRE),
+            expires = timezone.now() - datetime.timedelta(days = 365 - settings.INTERNET_DRAFT_DAYS_TO_EXPIRE),
         )
         p = PersonFactory(name="baseb_author")
         e = Email.objects.create(address="baseb_author@example.com", person=p, origin=p.user.username)

ietf/doc/tests_irsg_ballot.py

@@ -19,6 +19,7 @@ from ietf.doc.utils import create_ballot_if_not_open, close_ballot
 from ietf.person.utils import get_active_irsg, get_active_ads
 from ietf.group.factories import RoleFactory
 from ietf.person.models import Person
+from ietf.utils.timezone import date_today, datetime_today, DEADLINE_TZINFO
 
 
 class IssueIRSGBallotTests(TestCase):
@@ -254,7 +255,7 @@ class IssueIRSGBallotTests(TestCase):
         irsgmember = get_active_irsg()[0]
         secr = RoleFactory(group__acronym='secretariat',name_id='secr')
         wg_ballot = create_ballot_if_not_open(None, wg_draft, ad.person, 'approve')
-        due = datetime.date.today()+datetime.timedelta(days=14)
+        due = datetime_today(DEADLINE_TZINFO) + datetime.timedelta(days=14)
         rg_ballot = create_ballot_if_not_open(None, rg_draft, secr.person, 'irsg-approve', due)
 
         url = urlreverse('ietf.doc.views_ballot.edit_position', kwargs=dict(name=wg_draft.name, ballot_id=wg_ballot.pk))
@@ -323,7 +324,7 @@ class BaseManipulationTests():
     def test_issue_ballot(self):
         draft = RgDraftFactory()
         url = urlreverse('ietf.doc.views_ballot.issue_irsg_ballot',kwargs=dict(name=draft.name))
-        due = datetime.date.today()+datetime.timedelta(days=14)
+        due = date_today(DEADLINE_TZINFO)+datetime.timedelta(days=14)
         empty_outbox()
 
         login_testing_unauthorized(self, self.username , url)
@@ -444,7 +445,7 @@ class IRSGMemberTests(TestCase):
 
     def test_cant_issue_irsg_ballot(self):
         draft = RgDraftFactory()
-        due = datetime.date.today()+datetime.timedelta(days=14)
+        due = datetime_today(DEADLINE_TZINFO) + datetime.timedelta(days=14)
         url = urlreverse('ietf.doc.views_ballot.close_irsg_ballot', kwargs=dict(name=draft.name))
 
         self.client.login(username = self.username, password = self.username+'+password')

ietf/doc/tests_material.py

@@ -4,7 +4,6 @@
 
 import os
 import shutil
-import datetime
 import io
 
 from pathlib import Path
@@ -14,6 +13,7 @@ import debug              # pyflakes:ignore
 
 from django.conf import settings
 from django.urls import reverse as urlreverse
+from django.utils import timezone
 
 from ietf.doc.models import Document, State, DocAlias, NewRevisionDocEvent
 from ietf.group.factories import RoleFactory
@@ -155,7 +155,7 @@ class GroupMaterialTests(TestCase):
             name = "session-42-mars-1",
             meeting = Meeting.objects.get(number='42'),
             group = Group.objects.get(acronym='mars'),
-            modified = datetime.datetime.now(),
+            modified = timezone.now(),
         )
         SchedulingEvent.objects.create(
             session=session,

ietf/doc/tests_review.py

@@ -10,10 +10,10 @@ import email.mime.multipart, email.mime.text, email.utils
 from mock import patch
 from requests import Response
 
-
 from django.apps import apps
 from django.urls import reverse as urlreverse
 from django.conf import settings
+from django.utils import timezone
 
 from pyquery import PyQuery
 
@@ -38,6 +38,7 @@ from ietf.utils.mail import outbox, empty_outbox, parseaddr, on_behalf_of, get_p
 from ietf.utils.test_utils import login_testing_unauthorized, reload_db_objects
 from ietf.utils.test_utils import TestCase
 from ietf.utils.text import strip_prefix, xslugify
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
 from django.utils.html import escape
 
 class ReviewTests(TestCase):
@@ -67,7 +68,7 @@ class ReviewTests(TestCase):
         RoleFactory(group=review_team,person__user__username='reviewsecretary',person__user__email='reviewsecretary@example.com',name_id='secr')
         RoleFactory(group=review_team3,person__user__username='reviewsecretary3',person__user__email='reviewsecretary3@example.com',name_id='secr')
 
-        req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=datetime.datetime.now()+datetime.timedelta(days=20))
+        req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=timezone.now()+datetime.timedelta(days=20))
         ReviewAssignmentFactory(review_request = req, reviewer = rev_role.person.email_set.first(), state_id='accepted')
 
         url = urlreverse('ietf.doc.views_review.request_review', kwargs={ "name": doc.name })
@@ -77,7 +78,7 @@ class ReviewTests(TestCase):
         r = self.client.get(url)
         self.assertEqual(r.status_code, 200)
 
-        deadline = datetime.date.today() + datetime.timedelta(days=10)
+        deadline = date_today() + datetime.timedelta(days=10)
 
         empty_outbox()
 
@@ -145,7 +146,7 @@ class ReviewTests(TestCase):
         doc = WgDraftFactory(group__acronym='mars',rev='01')
         review_team = ReviewTeamFactory(acronym="reviewteam", name="Review Team", type_id="review", list_email="reviewteam@ietf.org", parent=Group.objects.get(acronym="farfut"))
         rev_role = RoleFactory(group=review_team,person__user__username='reviewer',person__user__email='reviewer@example.com',name_id='reviewer')
-        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=datetime.datetime.now()+datetime.timedelta(days=20))
+        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=timezone.now()+datetime.timedelta(days=20))
         ReviewAssignmentFactory(review_request=review_req, reviewer=rev_role.person.email_set.first(), state_id='accepted')
 
         # move the review request to a doubly-replaced document to
@@ -166,7 +167,7 @@ class ReviewTests(TestCase):
         doc = WgDraftFactory(group__acronym='mars',rev='01', authors=[author])
         review_team = ReviewTeamFactory(acronym="reviewteam", name="Review Team", type_id="review", list_email="reviewteam@ietf.org", parent=Group.objects.get(acronym="farfut"))
         rev_role = RoleFactory(group=review_team,person__user__username='reviewer',person__user__email='reviewer@example.com',name_id='reviewer')
-        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=datetime.datetime.now()+datetime.timedelta(days=20))
+        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=timezone.now()+datetime.timedelta(days=20))
         ReviewAssignmentFactory(review_request = review_req, reviewer = rev_role.person.email_set.first(), state_id='accepted')
 
         url = urlreverse('ietf.doc.views_review.review_request', kwargs={ "name": doc.name, "request_id": review_req.pk })
@@ -195,7 +196,7 @@ class ReviewTests(TestCase):
         rev_role = RoleFactory(group=review_team,person__user__username='reviewer',person__user__email='reviewer@example.com',name_id='reviewer')
         RoleFactory(group=review_team,person__user__username='reviewsecretary',person__user__email='reviewsecretary@example.com',name_id='secr')
         RoleFactory(group=review_team,person__user__username='reviewsecretary2',person__user__email='reviewsecretary2@example.com',name_id='secr')
-        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=datetime.datetime.now()+datetime.timedelta(days=20))
+        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=timezone.now()+datetime.timedelta(days=20))
         ReviewAssignmentFactory(review_request=review_req, state_id='accepted', reviewer=rev_role.person.email_set.first())
 
         close_url = urlreverse('ietf.doc.views_review.close_request', kwargs={ "name": doc.name, "request_id": review_req.pk })
@@ -260,14 +261,14 @@ class ReviewTests(TestCase):
 
         # previous review
         req = ReviewRequestFactory(
-            time=datetime.datetime.now() - datetime.timedelta(days=100),
+            time=timezone.now() - datetime.timedelta(days=100),
             requested_by=Person.objects.get(name="(System)"),
             doc=doc,
             type_id='early',
             team=review_req.team,
             state_id='assigned',
             requested_rev="01",
-            deadline=datetime.date.today() - datetime.timedelta(days=80),
+            deadline=date_today() - datetime.timedelta(days=80),
         )
         ReviewAssignmentFactory(
             review_request = req,
@@ -372,7 +373,7 @@ class ReviewTests(TestCase):
         doc = WgDraftFactory(group__acronym='mars',rev='01')
         review_team = ReviewTeamFactory(acronym="reviewteam", name="Review Team", type_id="review", list_email="reviewteam@ietf.org", parent=Group.objects.get(acronym="farfut"))
         rev_role = RoleFactory(group=review_team,person__user__username='reviewer',person__user__email='reviewer@example.com',name_id='reviewer')
-        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=datetime.datetime.now()+datetime.timedelta(days=20))
+        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=timezone.now()+datetime.timedelta(days=20))
         assignment = ReviewAssignmentFactory(review_request=review_req, state_id='assigned', reviewer=rev_role.person.email_set.first())
 
         url = urlreverse('ietf.doc.views_review.review_request', kwargs={ "name": doc.name, "request_id": review_req.pk })
@@ -395,7 +396,7 @@ class ReviewTests(TestCase):
         review_team = ReviewTeamFactory(acronym="reviewteam", name="Review Team", type_id="review", list_email="reviewteam@ietf.org", parent=Group.objects.get(acronym="farfut"))
         rev_role = RoleFactory(group=review_team,person__user__username='reviewer',person__user__email='reviewer@example.com',name_id='reviewer')
         RoleFactory(group=review_team,person__user__username='reviewsecretary',person__user__email='reviewsecretary@example.com',name_id='secr')
-        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=datetime.datetime.now()+datetime.timedelta(days=20))
+        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=timezone.now()+datetime.timedelta(days=20))
         assignment = ReviewAssignmentFactory(review_request = review_req, reviewer=rev_role.person.email_set.first(), state_id='accepted')
 
         reject_url = urlreverse('ietf.doc.views_review.reject_reviewer_assignment', kwargs={ "name": doc.name, "assignment_id": assignment.pk })
@@ -495,7 +496,7 @@ class ReviewTests(TestCase):
         review_team = ReviewTeamFactory(acronym="reviewteam", name="Review Team", type_id="review", list_email="reviewteam@ietf.org", parent=Group.objects.get(acronym="farfut"))
         rev_role = RoleFactory(group=review_team,person__user__username='reviewer',person__user__email='reviewer@example.com',name_id='reviewer')
         RoleFactory(group=review_team,person__user__username='reviewsecretary',person__user__email='reviewsecretary@example.com',name_id='secr')
-        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=datetime.datetime.now()+datetime.timedelta(days=20))
+        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=timezone.now()+datetime.timedelta(days=20))
         assignment = ReviewAssignmentFactory(review_request=review_req, reviewer=rev_role.person.email_set.first(), state_id='accepted')
 
         # test URL construction
@@ -525,7 +526,7 @@ class ReviewTests(TestCase):
             messages = r.json()["messages"]
             self.assertEqual(len(messages), 2)
 
-            today = datetime.date.today()
+            today = date_today()
 
             self.assertEqual(messages[0]["url"], "https://www.example.com/testmessage")
             self.assertTrue("John Doe" in messages[0]["content"])
@@ -587,7 +588,7 @@ class ReviewTests(TestCase):
         review_team = ReviewTeamFactory(acronym="reviewteam", name="Review Team", type_id="review", list_email="reviewteam@ietf.org", parent=Group.objects.get(acronym="farfut"))
         rev_role = RoleFactory(group=review_team,person__user__username='reviewer',person__user__email='reviewer@example.com',name_id='reviewer')
         RoleFactory(group=review_team,person__user__username='reviewsecretary',person__user__email='reviewsecretary@example.com',name_id='secr')
-        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=datetime.datetime.now()+datetime.timedelta(days=20))
+        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=timezone.now()+datetime.timedelta(days=20))
         assignment = ReviewAssignmentFactory(review_request=review_req, state_id='accepted', reviewer=rev_role.person.email_set.first())
         for r in ReviewResultName.objects.filter(slug__in=("issues", "ready")):
             review_req.team.reviewteamsettings.review_results.add(r)
@@ -699,7 +700,7 @@ class ReviewTests(TestCase):
         assignment = reload_db_objects(assignment)
         self.assertEqual(assignment.state_id, "completed")
         # Completed time should be close to now, but will not be exactly, so check within 10s margin
-        completed_time_diff = datetime.datetime.now() - assignment.completed_on
+        completed_time_diff = timezone.now() - assignment.completed_on
         self.assertLess(completed_time_diff, datetime.timedelta(seconds=10))
 
         with io.open(os.path.join(self.review_subdir, assignment.review.name + ".txt")) as f:
@@ -733,15 +734,15 @@ class ReviewTests(TestCase):
         # The secretary is allowed to set a custom completion date (#2590)
         assignment = reload_db_objects(assignment)
         self.assertEqual(assignment.state_id, "completed")
-        self.assertEqual(assignment.completed_on, datetime.datetime(2012, 12, 24, 12, 13, 14))
+        self.assertEqual(assignment.completed_on, datetime.datetime(2012, 12, 24, 12, 13, 14, tzinfo=DEADLINE_TZINFO))
 
         # There should be two events:
         # - the event logging when the change when it was entered, i.e. very close to now.
         # - the completion of the review, set to the provided date/time
         events = ReviewAssignmentDocEvent.objects.filter(doc=assignment.review_request.doc).order_by('-time')
-        event0_time_diff = datetime.datetime.now() - events[0].time
+        event0_time_diff = timezone.now() - events[0].time
         self.assertLess(event0_time_diff, datetime.timedelta(seconds=10))
-        self.assertEqual(events[1].time, datetime.datetime(2012, 12, 24, 12, 13, 14))
+        self.assertEqual(events[1].time, datetime.datetime(2012, 12, 24, 12, 13, 14, tzinfo=DEADLINE_TZINFO))
         
         with io.open(os.path.join(self.review_subdir, assignment.review.name + ".txt")) as f:
             self.assertEqual(f.read(), "This is a review\nwith two lines")
@@ -898,7 +899,7 @@ class ReviewTests(TestCase):
             assignment.review_request.team.acronym, 
             assignment.review_request.type.slug,
             xslugify(assignment.reviewer.person.ascii_parts()[3]),
-            datetime.date.today().isoformat(),
+            date_today().isoformat(),
         ]
         review_name = "-".join(c for c in name_components if c).lower()
         Document.objects.create(name=review_name,type_id='review',group=assignment.review_request.team)
@@ -985,7 +986,7 @@ class ReviewTests(TestCase):
         self.assertEqual(assignment.state_id, "completed")
         # The revision event time should be the date the revision was submitted, i.e. not backdated
         event1 = assignment.review_request.doc.latest_event(ReviewAssignmentDocEvent)
-        event_time_diff = datetime.datetime.now() - event1.time
+        event_time_diff = timezone.now() - event1.time
         self.assertLess(event_time_diff, datetime.timedelta(seconds=10))
         self.assertTrue('revised' in event1.desc.lower())
 
@@ -1012,7 +1013,7 @@ class ReviewTests(TestCase):
         assignment = reload_db_objects(assignment)
         self.assertEqual(assignment.review.rev, "01")
         event2 = assignment.review_request.doc.latest_event(ReviewAssignmentDocEvent)
-        event_time_diff = datetime.datetime.now() - event2.time
+        event_time_diff = timezone.now() - event2.time
         self.assertLess(event_time_diff, datetime.timedelta(seconds=10))
         # Ensure that a new event was created for the new revision (#2590)
         self.assertNotEqual(event1.id, event2.id)
@@ -1024,7 +1025,7 @@ class ReviewTests(TestCase):
         review_team = ReviewTeamFactory(acronym="reviewteam", name="Review Team", type_id="review", list_email="reviewteam@ietf.org", parent=Group.objects.get(acronym="farfut"))
         rev_role = RoleFactory(group=review_team,person__user__username='reviewer',person__user__email='reviewer@example.com',name_id='reviewer')
         RoleFactory(group=review_team,person__user__username='reviewsecretary',person__user__email='reviewsecretary@example.com',name_id='secr')
-        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=datetime.datetime.now()+datetime.timedelta(days=20))
+        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='assigned',requested_by=rev_role.person,deadline=timezone.now()+datetime.timedelta(days=20))
         ReviewAssignmentFactory(review_request = review_req, reviewer = rev_role.person.email_set.first(), state_id='accepted')
 
         url = urlreverse('ietf.doc.views_review.edit_comment', kwargs={ "name": doc.name, "request_id": review_req.pk })
@@ -1046,7 +1047,7 @@ class ReviewTests(TestCase):
         review_team = ReviewTeamFactory(acronym="reviewteam", name="Review Team", type_id="review", list_email="reviewteam@ietf.org", parent=Group.objects.get(acronym="farfut"))
         rev_role = RoleFactory(group=review_team,person__user__username='reviewer',person__user__email='reviewer@example.com',name_id='reviewer')
         RoleFactory(group=review_team,person__user__username='reviewsecretary',person__user__email='reviewsecretary@example.com',name_id='secr')
-        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='accepted',requested_by=rev_role.person,deadline=datetime.datetime.now()+datetime.timedelta(days=20))
+        review_req = ReviewRequestFactory(doc=doc,team=review_team,type_id='early',state_id='accepted',requested_by=rev_role.person,deadline=timezone.now()+datetime.timedelta(days=20))
         ReviewAssignmentFactory(review_request = review_req, reviewer = rev_role.person.email_set.first(), state_id='accepted')
 
         url = urlreverse('ietf.doc.views_review.edit_deadline', kwargs={ "name": doc.name, "request_id": review_req.pk })

ietf/doc/tests_utils.py

@@ -16,6 +16,7 @@ from ietf.doc.models import State, DocumentActionHolder, DocumentAuthor, Documen
 from ietf.doc.utils import (update_action_holders, add_state_change_event, update_documentauthors,
                             fuzzy_find_documents, rebuild_reference_relations)
 from ietf.utils.draft import Draft, PlaintextDraft
+from ietf.utils.timezone import date_today
 from ietf.utils.xmldraft import XMLDraft
 
 
@@ -143,12 +144,13 @@ class ActionHoldersTests(TestCase):
         doc = self.doc_in_iesg_state('pub-req')
         doc.action_holders.set([self.ad])
         dah = doc.documentactionholder_set.get(person=self.ad)
-        dah.time_added = datetime.datetime(2020, 1, 1)  # arbitrary date in the past
+        dah.time_added = datetime.datetime(2020, 1, 1, tzinfo=datetime.timezone.utc)  # arbitrary date in the past
         dah.save()
 
-        self.assertNotEqual(doc.documentactionholder_set.get(person=self.ad).time_added.date(), datetime.date.today())
+        today = date_today()
+        self.assertNotEqual(doc.documentactionholder_set.get(person=self.ad).time_added.date(), today)
         self.update_doc_state(doc, State.objects.get(slug='ad-eval'))
-        self.assertEqual(doc.documentactionholder_set.get(person=self.ad).time_added.date(), datetime.date.today())
+        self.assertEqual(doc.documentactionholder_set.get(person=self.ad).time_added.date(), today)
 
     def test_update_action_holders_add_tag_need_rev(self):
         """Adding need-rev tag adds authors as action holders"""

ietf/doc/utils.py

@@ -13,12 +13,14 @@ import textwrap
 
 from collections import defaultdict, namedtuple
 from urllib.parse import quote
+from zoneinfo import ZoneInfo
 
 from django.conf import settings
 from django.contrib import messages
 from django.forms import ValidationError
 from django.http import Http404
 from django.template.loader import render_to_string
+from django.utils import timezone
 from django.utils.html import escape
 from django.urls import reverse as urlreverse
 
@@ -39,6 +41,7 @@ from ietf.review.models import ReviewWish
 from ietf.utils import draft, log
 from ietf.utils.mail import send_mail
 from ietf.mailtrigger.utils import gather_address_lists
+from ietf.utils.timezone import date_today, datetime_from_date, datetime_today, DEADLINE_TZINFO
 from ietf.utils.xmldraft import XMLDraft
 
 
@@ -637,11 +640,22 @@ def has_same_ballot(doc, date1, date2=None):
     """ Test if the most recent ballot created before the end of date1
         is the same as the most recent ballot created before the
         end of date 2. """
+    datetime1 = datetime_from_date(date1, DEADLINE_TZINFO)
     if date2 is None:
-        date2 = datetime.date.today()
-    ballot1 = doc.latest_event(BallotDocEvent,type='created_ballot',time__lt=date1+datetime.timedelta(days=1))
-    ballot2 = doc.latest_event(BallotDocEvent,type='created_ballot',time__lt=date2+datetime.timedelta(days=1))
-    return ballot1==ballot2
+        datetime2 = datetime_today(DEADLINE_TZINFO)
+    else:
+        datetime2 = datetime_from_date(date2, DEADLINE_TZINFO)
+    ballot1 = doc.latest_event(
+        BallotDocEvent,
+        type='created_ballot',
+        time__lt=datetime1 + datetime.timedelta(days=1),
+    )
+    ballot2 = doc.latest_event(
+        BallotDocEvent,
+        type='created_ballot',
+        time__lt=datetime2 + datetime.timedelta(days=1),
+    )
+    return ballot1 == ballot2
 
 def make_notify_changed_event(request, doc, by, new_notify, time=None):
 
@@ -687,7 +701,7 @@ def update_telechat(request, doc, by, new_telechat_date, new_returning_item=None
          and on_agenda
          and prev_agenda
          and new_telechat_date != prev_telechat
-         and prev_telechat < datetime.date.today()
+         and prev_telechat < date_today(DEADLINE_TZINFO)
          and has_same_ballot(doc,prev.telechat_date)
        ):
         returning = True
@@ -718,7 +732,7 @@ def update_telechat(request, doc, by, new_telechat_date, new_returning_item=None
 
     e.save()
 
-    has_short_fuse = doc.type_id=='draft' and new_telechat_date and (( new_telechat_date - datetime.date.today() ) < datetime.timedelta(days=13))
+    has_short_fuse = doc.type_id=='draft' and new_telechat_date and (( new_telechat_date - date_today() ) < datetime.timedelta(days=13))
 
     from ietf.doc.mails import email_update_telechat
 
@@ -808,7 +822,7 @@ def set_replaces_for_document(request, doc, new_replaces, by, email_subject, com
             cc.update(other_addrs.cc)
             RelatedDocument.objects.filter(source=doc, target=d, relationship=relationship).delete()
             if not RelatedDocument.objects.filter(target=d, relationship=relationship):
-                s = 'active' if d.document.expires > datetime.datetime.now() else 'expired'
+                s = 'active' if d.document.expires > timezone.now() else 'expired'
                 d.document.set_state(State.objects.get(type='draft', slug=s))
 
     for d in new_replaces:
@@ -956,6 +970,7 @@ def make_rev_history(doc):
                         history[url]['pages'] = d.history_set.filter(rev=e.newrevisiondocevent.rev).first().pages
 
     if doc.type_id == "draft":
+        # e.time.date() agrees with RPC publication date when shown in the RPC_TZINFO time zone
         e = doc.latest_event(type='published_rfc')
     else:
         e = doc.latest_event(type='iesg_approved')
@@ -1119,7 +1134,7 @@ def build_doc_meta_block(doc, path):
             lines[i] = line
         return lines
     #
-    now = datetime.datetime.now()
+    now = timezone.now()
     draft_state = doc.get_state('draft')
     block = ''
     meta = {}
@@ -1337,14 +1352,15 @@ def bibxml_for_draft(doc, rev=None):
     latest_revision_event = doc.latest_event(NewRevisionDocEvent, type="new_revision")
     latest_revision_rev = latest_revision_event.rev if latest_revision_event else None
     best_events = NewRevisionDocEvent.objects.filter(doc__name=doc.name, rev=(rev or latest_revision_rev))
+    tzinfo = ZoneInfo(settings.TIME_ZONE)
     if best_events.exists():
         # There was a period where it was possible to get more than one NewRevisionDocEvent for a revision.
         # A future data cleanup would allow this to be simplified
         best_event = best_events.order_by('time').first()
         log.assertion('doc.rev == best_event.rev')
-        doc.date = best_event.time.date()
+        doc.date = best_event.time.astimezone(tzinfo).date()
     else:
-        doc.date = doc.time.date()      # Even if this may be incoreect, what would be better?
+        doc.date = doc.time.astimezone(tzinfo).date()      # Even if this may be incorrect, what would be better?
 
     return render_to_string('doc/bibxml.xml', {'name':doc.name, 'doc': doc, 'doc_bibtype':'I-D'})
 

ietf/doc/utils_charter.py

@@ -11,6 +11,7 @@ import shutil
 from django.conf import settings
 from django.urls import reverse as urlreverse
 from django.template.loader import render_to_string
+from django.utils import timezone
 from django.utils.encoding import smart_text, force_text
 
 import debug                            # pyflakes:ignore
@@ -24,6 +25,8 @@ from ietf.utils.mail import parse_preformatted
 from ietf.mailtrigger.utils import gather_address_lists
 from ietf.utils.log import log
 from ietf.group.utils import save_group_in_history
+from ietf.utils.timezone import date_today
+
 
 def charter_name_for_group(group):
     if group.type_id == "rg":
@@ -73,7 +76,7 @@ def change_group_state_after_charter_approval(group, by):
 
     save_group_in_history(group)
     group.state = new_state
-    group.time = datetime.datetime.now()
+    group.time = timezone.now()
     group.save()
 
     # create an event for the group state change, too
@@ -132,7 +135,7 @@ def historic_milestones_for_charter(charter, rev):
         # revision (when approving a charter)
         just_before_next_rev = e[0].time - datetime.timedelta(seconds=5)
     else:
-        just_before_next_rev = datetime.datetime.now()
+        just_before_next_rev = timezone.now()
 
     res = []
     if hasattr(charter, 'chartered_group'):
@@ -197,7 +200,7 @@ def derive_new_work_text(review_text,group):
     return smart_text(m.as_string())
 
 def default_review_text(group, charter, by):
-    now = datetime.datetime.now()
+    now = timezone.now()
     addrs = gather_address_lists('charter_external_review',group=group).as_strings(compact=False)
 
     e1 = WriteupDocEvent(doc=charter, rev=charter.rev, by=by)
@@ -215,7 +218,7 @@ def default_review_text(group, charter, by):
                                     parent_ads=group.parent.role_set.filter(name='ad'),
                                     techadv=group.role_set.filter(name="techadv"),
                                     milestones=group.groupmilestone_set.filter(state="charter"),
-                                    review_date=(datetime.date.today() + datetime.timedelta(weeks=1)).isoformat(),
+                                    review_date=(date_today() + datetime.timedelta(weeks=1)).isoformat(),
                                     review_type="new" if group.state_id in ["proposed","bof"] else "recharter",
                                     to=addrs.to,
                                     cc=addrs.cc,

ietf/doc/utils_search.py

@@ -5,11 +5,17 @@ import re
 import datetime
 import debug                            # pyflakes:ignore
 
+from zoneinfo import ZoneInfo
+
+from django.conf import settings
+
 from ietf.doc.models import Document, DocAlias, RelatedDocument, DocEvent, TelechatDocEvent, BallotDocEvent
 from ietf.doc.expire import expirable_drafts
 from ietf.doc.utils import augment_docs_and_user_with_user_info
 from ietf.meeting.models import SessionPresentation, Meeting, Session
 from ietf.review.utils import review_assignments_to_list_for_docs
+from ietf.utils.timezone import date_today
+
 
 def wrap_value(v):
     return lambda: v
@@ -30,8 +36,9 @@ def fill_in_telechat_date(docs, doc_dict=None, doc_ids=None):
             seen.add(e.doc_id)
 
 def fill_in_document_sessions(docs, doc_dict, doc_ids):
-    beg_date = datetime.date.today()-datetime.timedelta(days=7)
-    end_date = datetime.date.today()+datetime.timedelta(days=30)
+    today = date_today()
+    beg_date = today-datetime.timedelta(days=7)
+    end_date = today+datetime.timedelta(days=30)
     meetings = Meeting.objects.filter(date__gte=beg_date, date__lte=end_date).prefetch_related('session_set')
     # get sessions
     sessions = Session.objects.filter(meeting_id__in=[ m.id for m in meetings ])
@@ -204,7 +211,7 @@ def prepare_document_table(request, docs, query=None, max_results=200):
         if sort_key == "title":
             res.append(d.title)
         elif sort_key == "date":
-            res.append(str(d.latest_revision_date))
+            res.append(str(d.latest_revision_date.astimezone(ZoneInfo(settings.TIME_ZONE))))
         elif sort_key == "status":
             if rfc_num != None:
                 res.append(num(rfc_num))

ietf/doc/views_ballot.py

@@ -40,6 +40,8 @@ from ietf.person.models import Person
 from ietf.utils.mail import send_mail_text, send_mail_preformatted
 from ietf.utils.decorators import require_api_key
 from ietf.utils.response import permission_denied
+from ietf.utils.timezone import date_today, datetime_from_date, DEADLINE_TZINFO
+
 
 BALLOT_CHOICES = (("yes", "Yes"),
                   ("noobj", "No Objection"),
@@ -1055,9 +1057,11 @@ def make_last_call(request, name):
             e.desc = "The following Last Call announcement was sent out (ends %s):<br><br>" % expiration_date
             e.desc += announcement
 
-            if form.cleaned_data['last_call_sent_date'] != e.time.date():
-                e.time = datetime.datetime.combine(form.cleaned_data['last_call_sent_date'], e.time.time())
-            e.expires = expiration_date
+            e_production_time = e.time.astimezone(DEADLINE_TZINFO)
+            if form.cleaned_data['last_call_sent_date'] != e_production_time.date():
+                lcsd = form.cleaned_data['last_call_sent_date']
+                e.time = e_production_time.replace(year=lcsd.year, month=lcsd.month, day=lcsd.day)  # preserves tzinfo
+            e.expires = datetime_from_date(expiration_date, DEADLINE_TZINFO)
             e.save()
             events.append(e)
 
@@ -1080,7 +1084,7 @@ def make_last_call(request, name):
             return HttpResponseRedirect(doc.get_absolute_url())
     else:
         initial = {}
-        initial["last_call_sent_date"] = datetime.date.today()
+        initial["last_call_sent_date"] = date_today()
         if doc.type.slug == 'draft':
             # This logic is repeated in the code that edits last call text - why?
             expire_days = 14
@@ -1091,7 +1095,7 @@ def make_last_call(request, name):
             expire_days=28
             templ = 'doc/status_change/make_last_call.html'
 
-        initial["last_call_expiration_date"] = datetime.date.today() + datetime.timedelta(days=expire_days)
+        initial["last_call_expiration_date"] = date_today() + datetime.timedelta(days=expire_days)
         
         form = MakeLastCallForm(initial=initial)
   
@@ -1108,7 +1112,7 @@ def issue_irsg_ballot(request, name):
         raise Http404
 
     by = request.user.person
-    fillerdate = datetime.date.today() + datetime.timedelta(weeks=2)
+    fillerdate = date_today(DEADLINE_TZINFO) + datetime.timedelta(weeks=2)
 
     if request.method == 'POST':
         button = request.POST.get("irsg_button")
@@ -1117,7 +1121,7 @@ def issue_irsg_ballot(request, name):
             e = IRSGBallotDocEvent(doc=doc, rev=doc.rev, by=request.user.person)
             if (duedate == None or duedate==""):
                 duedate = str(fillerdate)
-            e.duedate = datetime.datetime.strptime(duedate, '%Y-%m-%d')
+            e.duedate = datetime_from_date(datetime.datetime.strptime(duedate, '%Y-%m-%d'), DEADLINE_TZINFO)
             e.type = "created_ballot"
             e.desc = "Created IRSG Ballot"
             ballot_type = BallotType.objects.get(doc_type=doc.type, slug="irsg-approve")
@@ -1188,7 +1192,10 @@ def irsg_ballot_status(request):
             ballot = doc.active_ballot()
             if ballot:
                 doc.ballot = ballot
-                doc.duedate=datetime.datetime.strftime(ballot.irsgballotdocevent.duedate, '%Y-%m-%d')
+                doc.duedate=datetime.datetime.strftime(
+                    ballot.irsgballotdocevent.duedate.astimezone(DEADLINE_TZINFO),
+                    '%Y-%m-%d',
+                )
 
             docs.append(doc)
 

ietf/doc/views_charter.py

@@ -16,6 +16,7 @@ from django.utils.safestring import mark_safe
 from django.conf import settings
 from django.contrib import messages
 from django.contrib.auth.decorators import login_required
+from django.utils import timezone
 from django.utils.encoding import force_text
 from django.utils.html import escape
 
@@ -77,7 +78,7 @@ def change_state(request, name, option=None):
     chartering_type = get_chartering_type(charter)
 
     initial_review = charter.latest_event(InitialReviewDocEvent, type="initial_review")
-    if charter.get_state_slug() != "infrev" or (initial_review and initial_review.expires < datetime.datetime.now()) or chartering_type == "rechartering":
+    if charter.get_state_slug() != "infrev" or (initial_review and initial_review.expires < timezone.now()) or chartering_type == "rechartering":
         initial_review = None
 
     by = request.user.person
@@ -183,7 +184,7 @@ def change_state(request, name, option=None):
 
             if charter_state.slug == "infrev" and clean["initial_time"] and clean["initial_time"] != 0:
                 e = InitialReviewDocEvent(type="initial_review", by=by, doc=charter, rev=charter.rev)
-                e.expires = datetime.datetime.now() + datetime.timedelta(weeks=clean["initial_time"])
+                e.expires = timezone.now() + datetime.timedelta(weeks=clean["initial_time"])
                 e.desc = "Initial review time expires %s" % e.expires.strftime("%Y-%m-%d")
                 e.save()
 
@@ -506,7 +507,7 @@ def review_announcement_text(request, name):
         existing_new_work.type = "changed_new_work_text"
         existing_new_work.desc = "%s review text was changed" % group.type.name
         existing_new_work.text = derive_new_work_text(existing.text,group)
-        existing_new_work.time = datetime.datetime.now()
+        existing_new_work.time = timezone.now()
 
     form = ReviewAnnouncementTextForm(initial=dict(announcement_text=escape(existing.text),new_work_text=escape(existing_new_work.text)))
 
@@ -514,7 +515,7 @@ def review_announcement_text(request, name):
         form = ReviewAnnouncementTextForm(request.POST)
         if "save_text" in request.POST and form.is_valid():
 
-            now = datetime.datetime.now()
+            now = timezone.now()
             events = []
 
             t = form.cleaned_data['announcement_text']

ietf/doc/views_doc.py

@@ -34,7 +34,6 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
-import datetime
 import glob
 import io
 import json
@@ -85,6 +84,7 @@ from ietf.utils import markup_txt, log, markdown
 from ietf.utils.draft import PlaintextDraft
 from ietf.utils.response import permission_denied
 from ietf.utils.text import maybe_split
+from ietf.utils.timezone import date_today
 
 
 def render_document_top(request, doc, tab, name):
@@ -186,7 +186,7 @@ def document_main(request, name, rev=None):
 
 
     telechat = doc.latest_event(TelechatDocEvent, type="scheduled_for_telechat")
-    if telechat and (not telechat.telechat_date or telechat.telechat_date < datetime.date.today()):
+    if telechat and (not telechat.telechat_date or telechat.telechat_date < date_today(settings.TIME_ZONE)):
        telechat = None
 
 
@@ -990,7 +990,7 @@ def document_bibtex(request, name, rev=None):
 
     latest_revision = doc.latest_event(NewRevisionDocEvent, type="new_revision")
     replaced_by = [d.name for d in doc.related_that("replaces")]
-    published = doc.latest_event(type="published_rfc")
+    published = doc.latest_event(type="published_rfc") is not None
     rfc = latest_revision.doc if latest_revision and latest_revision.doc.get_state_slug() == "rfc" else None
 
     if rev != None and rev != doc.rev:
@@ -1408,11 +1408,12 @@ def telechat_date(request, name):
 
     warnings = []
     if e and e.telechat_date and doc.type.slug != 'charter':
-        if e.telechat_date==datetime.date.today():
+        today = date_today(settings.TIME_ZONE)
+        if e.telechat_date == today:
             warnings.append( "This document is currently scheduled for today's telechat. "
                             +"Please set the returning item bit carefully.")
 
-        elif e.telechat_date<datetime.date.today() and has_same_ballot(doc,e.telechat_date):
+        elif e.telechat_date < today and has_same_ballot(doc,e.telechat_date):
             initial_returning_item = True
             warnings.append(  "This document appears to have been on a previous telechat with the same ballot, "
                             +"so the returning item bit has been set. Clear it if that is not appropriate.")

ietf/doc/views_draft.py

@@ -19,6 +19,7 @@ from django.shortcuts import render, get_object_or_404, redirect
 from django.template.loader import render_to_string
 from django.forms.utils import ErrorList
 from django.template.defaultfilters import pluralize
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -52,6 +53,8 @@ from ietf.utils.mail import send_mail, send_mail_message, on_behalf_of
 from ietf.utils.textupload import get_cleaned_text_file_content
 from ietf.utils import log
 from ietf.utils.response import permission_denied
+from ietf.utils.timezone import datetime_today, DEADLINE_TZINFO
+
 
 class ChangeStateForm(forms.Form):
     state = forms.ModelChoiceField(State.objects.filter(used=True, type="draft-iesg"), empty_label=None, required=True)
@@ -857,7 +860,7 @@ def resurrect(request, name):
         events.append(e)
 
         doc.set_state(State.objects.get(used=True, type="draft", slug="active"))
-        doc.expires = datetime.datetime.now() + datetime.timedelta(settings.INTERNET_DRAFT_DAYS_TO_EXPIRE)
+        doc.expires = timezone.now() + datetime.timedelta(settings.INTERNET_DRAFT_DAYS_TO_EXPIRE)
         doc.save_with_history(events)
 
         restore_draft_file(request, doc)
@@ -1480,7 +1483,7 @@ def adopt_draft(request, name):
 
                 due_date = None
                 if form.cleaned_data["weeks"] != None:
-                    due_date = datetime.date.today() + datetime.timedelta(weeks=form.cleaned_data["weeks"])
+                    due_date = datetime_today(DEADLINE_TZINFO) + datetime.timedelta(weeks=form.cleaned_data["weeks"])
 
                 update_reminder(doc, "stream-s", e, due_date)
 
@@ -1671,7 +1674,7 @@ def change_stream_state(request, name, state_type):
 
                 due_date = None
                 if form.cleaned_data["weeks"] != None:
-                    due_date = datetime.date.today() + datetime.timedelta(weeks=form.cleaned_data["weeks"])
+                    due_date = datetime_today(DEADLINE_TZINFO) + datetime.timedelta(weeks=form.cleaned_data["weeks"])
 
                 update_reminder(doc, "stream-s", e, due_date)
 

ietf/doc/views_review.py

@@ -10,7 +10,9 @@ import datetime
 import requests
 import email.utils
 
+from django.utils import timezone
 from django.utils.http import is_safe_url
+
 from simple_history.utils import update_change_reason
 
 import debug    # pyflakes:ignore
@@ -52,6 +54,8 @@ from ietf.utils.mail import send_mail_message
 from ietf.mailtrigger.utils import gather_address_lists
 from ietf.utils.fields import MultiEmailField
 from ietf.utils.response import permission_denied
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
+
 
 def clean_doc_revision(doc, rev):
     if rev:
@@ -92,7 +96,7 @@ class RequestReviewForm(forms.ModelForm):
 
     def clean_deadline(self):
         v = self.cleaned_data.get('deadline')
-        if v < datetime.date.today():
+        if v < date_today(DEADLINE_TZINFO):
             raise forms.ValidationError("Select today or a date in the future.")
         return v
 
@@ -117,7 +121,7 @@ def request_review(request, name):
     if not can_request_review_of_doc(request.user, doc):
         permission_denied(request, "You do not have permission to perform this action")
 
-    now = datetime.datetime.now()
+    now = timezone.now()
 
     lc_ends = None
     e = doc.latest_event(LastCallDocEvent, type="sent_last_call")
@@ -348,7 +352,7 @@ class RejectReviewerAssignmentForm(forms.Form):
 def reject_reviewer_assignment(request, name, assignment_id):
     doc = get_object_or_404(Document, name=name)
     review_assignment = get_object_or_404(ReviewAssignment, pk=assignment_id, state__in=["assigned", "accepted"])
-    review_request_past_deadline = review_assignment.review_request.deadline < datetime.date.today()
+    review_request_past_deadline = review_assignment.review_request.deadline < date_today(DEADLINE_TZINFO)
 
     if not review_assignment.reviewer:
         return redirect(review_request, name=review_assignment.review_request.doc.name, request_id=review_assignment.review_request.pk)
@@ -364,7 +368,7 @@ def reject_reviewer_assignment(request, name, assignment_id):
         if form.is_valid():
             # reject the assignment
             review_assignment.state = ReviewAssignmentStateName.objects.get(slug="rejected")
-            review_assignment.completed_on = datetime.datetime.now()
+            review_assignment.completed_on = timezone.now()
             review_assignment.save()
 
             descr = "Assignment of request for {} review by {} to {} was rejected".format(
@@ -531,7 +535,7 @@ class CompleteReviewForm(forms.Form):
     review_url = forms.URLField(label="Link to message", required=False)
     review_file = forms.FileField(label="Text file to upload", required=False)
     review_content = forms.CharField(widget=forms.Textarea, required=False, strip=False)
-    completion_date = DatepickerDateField(date_format="yyyy-mm-dd", picker_settings={ "autoclose": "1" }, initial=datetime.date.today, help_text="Date of announcement of the results of this review")
+    completion_date = DatepickerDateField(date_format="yyyy-mm-dd", picker_settings={ "autoclose": "1" }, initial=date_today, help_text="Date of announcement of the results of this review")
     completion_time = forms.TimeField(widget=forms.HiddenInput, initial=datetime.time.min)
     cc = MultiEmailField(required=False, help_text="Email addresses to send to in addition to the review team list")
     email_ad = forms.BooleanField(label="Send extra email to the responsible AD suggesting early attention", required=False)
@@ -704,7 +708,7 @@ def complete_review(request, name, assignment_id=None, acronym=None):
                     team.acronym, 
                     request_type.slug,
                     xslugify(reviewer.person.ascii_parts()[3]),
-                    datetime.date.today().isoformat(),
+                    date_today().isoformat(),
                 ]
                 review_name = "-".join(c for c in name_components if c).lower()
                 if not Document.objects.filter(name=review_name).exists():
@@ -723,7 +727,7 @@ def complete_review(request, name, assignment_id=None, acronym=None):
                     type=form.cleaned_data['review_type'],
                     doc=doc,
                     team=team,
-                    deadline=datetime.date.today(),
+                    deadline=date_today(DEADLINE_TZINFO),
                     requested_by=Person.objects.get(user=request.user),
                     requested_rev=form.cleaned_data['reviewed_rev'],
                 )
@@ -731,13 +735,13 @@ def complete_review(request, name, assignment_id=None, acronym=None):
                     review_request=review_request,
                     state_id='assigned',
                     reviewer=form.cleaned_data['reviewer'].role_email('reviewer', group=team),
-                    assigned_on=datetime.datetime.now(),
+                    assigned_on=timezone.now(),
                     review = review,
                 )
 
             review.rev = "00" if not review.rev else "{:02}".format(int(review.rev) + 1)
             review.title = "{} Review of {}-{}".format(assignment.review_request.type.name, assignment.review_request.doc.name, form.cleaned_data["reviewed_rev"])
-            review.time = datetime.datetime.now()
+            review.time = timezone.now()
             if review_submission == "link":
                 review.external_url = form.cleaned_data['review_url']
 
@@ -764,9 +768,13 @@ def complete_review(request, name, assignment_id=None, acronym=None):
             with io.open(filename, 'w', encoding='utf-8') as destination:
                 destination.write(content)
 
-            completion_datetime = datetime.datetime.now()
+            completion_datetime = timezone.now()
             if "completion_date" in form.cleaned_data:
-                completion_datetime = datetime.datetime.combine(form.cleaned_data["completion_date"], form.cleaned_data.get("completion_time") or datetime.time.min)
+                completion_datetime = datetime.datetime.combine(
+                    form.cleaned_data["completion_date"],
+                    form.cleaned_data.get("completion_time") or datetime.time.min,
+                    tzinfo=DEADLINE_TZINFO,
+                )
 
             # complete assignment
             assignment.state = form.cleaned_data["state"]
@@ -778,7 +786,7 @@ def complete_review(request, name, assignment_id=None, acronym=None):
 
             need_to_email_review = review_submission != "link" and assignment.review_request.team.list_email and not revising_review
 
-            submitted_on_different_date = completion_datetime.date() != datetime.date.today()
+            submitted_on_different_date = completion_datetime.date() != date_today(DEADLINE_TZINFO)
             desc = "Request for {} review by {} {}: {}. Reviewer: {}.".format(
                 assignment.review_request.type.name,
                 assignment.review_request.team.acronym.upper(),
@@ -799,7 +807,7 @@ def complete_review(request, name, assignment_id=None, acronym=None):
             close_event.by = request.user.person
             close_event.desc = desc
             close_event.state = assignment.state
-            close_event.time = datetime.datetime.now()
+            close_event.time = timezone.now()
             close_event.save()
             
             # If the completion date is different, record when the initial review was made too.
@@ -894,8 +902,13 @@ def complete_review(request, name, assignment_id=None, acronym=None):
         }
 
         try:
-            initial['review_content'] = render_to_string('/group/%s/review/content_templates/%s.txt' % (assignment.review_request.team.acronym,
-                                                                                                        request_type.slug), {'assignment':assignment, 'today':datetime.date.today()}) 
+            initial['review_content'] = render_to_string(
+                f'/group/{assignment.review_request.team.acronym}/review/content_templates/{request_type.slug}.txt',
+                {
+                    'assignment': assignment,
+                    'today': date_today(settings.TIME_ZONE),
+                },
+            )
         except (TemplateDoesNotExist, AttributeError):
             pass
 
@@ -984,7 +997,7 @@ class EditReviewRequestDeadlineForm(forms.ModelForm):
 
     def clean_deadline(self):
         v = self.cleaned_data.get('deadline')
-        if v < datetime.date.today():
+        if v < date_today(DEADLINE_TZINFO):
             raise forms.ValidationError("Select today or a date in the future.")
         return v
 

ietf/doc/views_search.py

@@ -453,7 +453,7 @@ def ad_dashboard_sort_key(doc):
         ageseconds = 0
         changetime= doc.latest_event(type='changed_document')
         if changetime:
-            ad = (datetime.datetime.now()-doc.latest_event(type='changed_document').time)
+            ad = (timezone.now()-doc.latest_event(type='changed_document').time)
             ageseconds = (ad.microseconds + (ad.seconds + ad.days * 24 * 3600) * 10**6) / 10**6
         return "1%d%s%s%010d" % (state[0].order,seed,doc.type.slug,ageseconds)
 
@@ -761,7 +761,7 @@ def recent_drafts(request, days=7):
     cache_key = f'recentdraftsview{days}' 
     cached_val = slowcache.get(cache_key)
     if not cached_val:
-        since = datetime.datetime.now()-datetime.timedelta(days=days)
+        since = timezone.now()-datetime.timedelta(days=days)
         state = State.objects.get(type='draft', slug='active')
         events = NewRevisionDocEvent.objects.filter(time__gt=since)
         names = [ e.doc.name for e in events ]

ietf/doc/views_stats.py

@@ -19,6 +19,8 @@ from ietf.doc.utils import get_search_cache_key
 from ietf.doc.views_search import SearchForm, retrieve_search_results
 from ietf.name.models import DocTypeName
 from ietf.person.models import Person
+from ietf.utils.timezone import date_today
+
 
 epochday = datetime.datetime.utcfromtimestamp(0).date().toordinal()
 
@@ -47,7 +49,7 @@ def model_to_timeline_data(model, field='time', **kwargs):
         # This is needed for sqlite, when we're running tests:
         if type(obj_list[0]['date']) != datetime.date:
             obj_list = [ {'date': dt(e['date']), 'count': e['count']} for e in obj_list ]
-        today = datetime.date.today()
+        today = date_today()
         if not obj_list[-1]['date'] == today:
             obj_list += [ {'date': today, 'count': 0} ]
         data = [ ((e['date'].toordinal()-epochday)*1000*60*60*24, e['count']) for e in obj_list ]

ietf/doc/views_status_change.py

@@ -35,6 +35,7 @@ from ietf.name.models import DocRelationshipName, StdLevelName
 from ietf.person.models import Person
 from ietf.utils.mail import send_mail_preformatted
 from ietf.utils.textupload import get_cleaned_text_file_content
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
 
 
 class ChangeStateForm(forms.Form):
@@ -638,7 +639,7 @@ def generate_last_call_text(request, doc):
     # and when groups are set, vary the expiration time accordingly
 
     requester = "an individual participant"
-    expiration_date = datetime.date.today() + datetime.timedelta(days=28)
+    expiration_date = date_today(DEADLINE_TZINFO) + datetime.timedelta(days=28)
     cc = []
     
     new_text = render_to_string("doc/status_change/last_call_announcement.txt",

ietf/group/factories.py

@@ -5,6 +5,8 @@ import factory
 
 from typing import List    # pyflakes:ignore
 
+from django.utils import timezone
+
 from ietf.group.models import Group, Role, GroupEvent, GroupMilestone, \
                               GroupHistory, RoleHistory
 from ietf.review.factories import ReviewTeamSettingsFactory
@@ -66,7 +68,7 @@ class BaseGroupMilestoneFactory(factory.django.DjangoModelFactory):
 
 class DatedGroupMilestoneFactory(BaseGroupMilestoneFactory):
     group = factory.SubFactory(GroupFactory, uses_milestone_dates=True)
-    due = datetime.datetime.today()+datetime.timedelta(days=180)
+    due = timezone.now()+datetime.timedelta(days=180)
 
 class DatelessGroupMilestoneFactory(BaseGroupMilestoneFactory):
     group = factory.SubFactory(GroupFactory, uses_milestone_dates=False)

ietf/group/forms.py

@@ -3,7 +3,6 @@
 
 
 # Stdlib imports
-import datetime
 import re
 
 import debug      # pyflakes:ignore
@@ -27,6 +26,7 @@ from ietf.utils import log
 from ietf.utils.textupload import get_cleaned_text_file_content
 #from ietf.utils.ordereddict import insert_after_in_ordered_dict
 from ietf.utils.fields import DatepickerDateField, MultiEmailField
+from ietf.utils.timezone import date_today
 from ietf.utils.validators import validate_external_resource_value
 
 # --- Constants --------------------------------------------------------
@@ -364,7 +364,7 @@ class AddUnavailablePeriodForm(forms.ModelForm):
     def __init__(self, *args, **kwargs):
         super(AddUnavailablePeriodForm, self).__init__(*args, **kwargs)
 
-        self.fields["start_date"] = DatepickerDateField(date_format="yyyy-mm-dd", picker_settings={"autoclose": "1" }, label=self.fields["start_date"].label, help_text=self.fields["start_date"].help_text, required=self.fields["start_date"].required, initial=datetime.date.today())
+        self.fields["start_date"] = DatepickerDateField(date_format="yyyy-mm-dd", picker_settings={"autoclose": "1" }, label=self.fields["start_date"].label, help_text=self.fields["start_date"].help_text, required=self.fields["start_date"].required, initial=date_today())
         self.fields["end_date"] = DatepickerDateField(date_format="yyyy-mm-dd", picker_settings={"autoclose": "1" }, label=self.fields["end_date"].label, help_text=self.fields["end_date"].help_text, required=self.fields["end_date"].required)
 
         self.fields['availability'].widget = forms.RadioSelect(choices=UnavailablePeriod.LONG_AVAILABILITY_CHOICES)

ietf/group/management/commands/generate_group_aliases.py

@@ -15,6 +15,7 @@ from tempfile import mkstemp
     
 from django.conf import settings
 from django.core.management.base import BaseCommand
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -39,7 +40,7 @@ class Command(BaseCommand):
             'have seen activity in the last %s years.' % (DEFAULT_YEARS))
 
     def handle(self, *args, **options):
-        show_since = datetime.datetime.now() - datetime.timedelta(DEFAULT_YEARS*365)
+        show_since = timezone.now() - datetime.timedelta(DEFAULT_YEARS*365)
 
         date = time.strftime("%Y-%m-%d_%H:%M:%S")
         signature = '# Generated by %s at %s\n' % (os.path.abspath(__file__), date)

ietf/group/migrations/0059_use_timezone_now_for_group_models.py

@@ -0,0 +1,29 @@
+# Generated by Django 2.2.28 on 2022-07-12 11:24
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('group', '0058_alter_has_default_chat'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='group',
+            name='time',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AlterField(
+            model_name='groupevent',
+            name='time',
+            field=models.DateTimeField(default=django.utils.timezone.now, help_text='When the event happened'),
+        ),
+        migrations.AlterField(
+            model_name='grouphistory',
+            name='time',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+    ]

ietf/group/models.py

@@ -2,7 +2,6 @@
 # -*- coding: utf-8 -*-
 
 
-import datetime
 import email.utils
 import jsonfield
 import os
@@ -13,6 +12,7 @@ from django.core.validators import RegexValidator
 from django.db import models
 from django.db.models.deletion import CASCADE, PROTECT
 from django.dispatch import receiver
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -27,7 +27,7 @@ from ietf.utils.validators import JSONForeignKeyListValidator
 
 
 class GroupInfo(models.Model):
-    time = models.DateTimeField(default=datetime.datetime.now)
+    time = models.DateTimeField(default=timezone.now)
     name = models.CharField(max_length=80)
     state = ForeignKey(GroupStateName, null=True)
     type = ForeignKey(GroupTypeName, null=True)
@@ -180,11 +180,15 @@ class Group(GroupInfo):
         return self.role_set.none()
 
     def status_for_meeting(self,meeting):
-        end_date = meeting.end_date()+datetime.timedelta(days=1)
         previous_meeting = meeting.previous_meeting()
-        status_events = self.groupevent_set.filter(type='status_update',time__lte=end_date).order_by('-time')
+        status_events = self.groupevent_set.filter(
+            type='status_update',
+            time__lt=meeting.end_datetime(),
+        ).order_by('-time')
         if previous_meeting:
-            status_events = status_events.filter(time__gte=previous_meeting.end_date()+datetime.timedelta(days=1))
+            status_events = status_events.filter(
+                time__gte=previous_meeting.end_datetime()
+            )
         return status_events.first()
 
     def get_description(self):
@@ -353,7 +357,7 @@ GROUP_EVENT_CHOICES = [
 class GroupEvent(models.Model):
     """An occurrence for a group, used for tracking who, when and what."""
     group = ForeignKey(Group)
-    time = models.DateTimeField(default=datetime.datetime.now, help_text="When the event happened")
+    time = models.DateTimeField(default=timezone.now, help_text="When the event happened")
     type = models.CharField(max_length=50, choices=GROUP_EVENT_CHOICES)
     by = ForeignKey(Person)
     desc = models.TextField()

ietf/group/tests.py

@@ -13,6 +13,7 @@ from django.conf import settings
 from django.urls import reverse as urlreverse
 from django.db.models import Q
 from django.test import Client
+from django.utils import timezone
 
 import debug                             # pyflakes:ignore
 
@@ -115,8 +116,8 @@ class GenerateGroupAliasesTests(TestCase):
         super().tearDown()
 
     def testManagementCommand(self):
-        a_month_ago = datetime.datetime.now() - datetime.timedelta(30)
-        a_decade_ago = datetime.datetime.now() - datetime.timedelta(3650)
+        a_month_ago = timezone.now() - datetime.timedelta(30)
+        a_decade_ago = timezone.now() - datetime.timedelta(3650)
         role1 = RoleFactory(name_id='ad', group__type_id='area', group__acronym='myth', group__state_id='active')
         area = role1.group
         ad = role1.person

ietf/group/tests_info.py

@@ -42,6 +42,8 @@ from ietf.person.factories import PersonFactory, EmailFactory
 from ietf.review.factories import ReviewRequestFactory, ReviewAssignmentFactory
 from ietf.utils.mail import outbox, empty_outbox, get_payload_text
 from ietf.utils.test_utils import login_testing_unauthorized, TestCase, unicontent, reload_db_objects
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
+
 
 def group_urlreverse_list(group, viewname):
     return [
@@ -269,7 +271,7 @@ class GroupPagesTests(TestCase):
             group=group,
             state_id="active",
             desc="Get Work Done",
-            due=datetime.date.today() + datetime.timedelta(days=100))
+            due=date_today(DEADLINE_TZINFO) + datetime.timedelta(days=100))
         milestone.docs.add(draft)
 
         for url in [group.about_url(),] + group_urlreverse_list(group, 'ietf.group.views.group_about'):
@@ -876,7 +878,7 @@ class GroupEditTests(TestCase):
         self.assertEqual(r.status_code, 302)
         review_assignment.state_id = 'accepted'
         review_assignment.save()
-        review_req.deadline = datetime.date.today() - datetime.timedelta(days=1)
+        review_req.deadline = date_today(DEADLINE_TZINFO) - datetime.timedelta(days=1)
         review_req.save()
         
         r = self.client.post(url, post_data)
@@ -1194,7 +1196,7 @@ class MilestoneTests(TestCase):
         m1 = GroupMilestone.objects.create(id=1,
                                            group=group,
                                            desc="Test 1",
-                                           due=datetime.date.today(),
+                                           due=date_today(DEADLINE_TZINFO),
                                            resolved="",
                                            state_id="active")
         m1.docs.set([draft])
@@ -1202,7 +1204,7 @@ class MilestoneTests(TestCase):
         m2 = GroupMilestone.objects.create(id=2,
                                            group=group,
                                            desc="Test 2",
-                                           due=datetime.date.today(),
+                                           due=date_today(DEADLINE_TZINFO),
                                            resolved="",
                                            state_id="charter")
         m2.docs.set([draft])
@@ -1246,7 +1248,7 @@ class MilestoneTests(TestCase):
         events_before = group.groupevent_set.count()
         doc_pks = pklist(Document.objects.filter(type="draft"))
 
-        due = self.last_day_of_month(datetime.date.today() + datetime.timedelta(days=365))
+        due = self.last_day_of_month(date_today(DEADLINE_TZINFO) + datetime.timedelta(days=365))
 
         # faulty post
         r = self.client.post(url, { 'prefix': "m-1",
@@ -1302,7 +1304,7 @@ class MilestoneTests(TestCase):
 
         milestones_before = GroupMilestone.objects.filter(group=group).count()
         events_before = group.groupevent_set.count()
-        due = self.last_day_of_month(datetime.date.today() + datetime.timedelta(days=365))
+        due = self.last_day_of_month(date_today(DEADLINE_TZINFO) + datetime.timedelta(days=365))
 
         # add
         mailbox_before = len(outbox)
@@ -1393,7 +1395,7 @@ class MilestoneTests(TestCase):
         events_before = group.groupevent_set.count()
         doc_pks = pklist(Document.objects.filter(type="draft"))
 
-        due = self.last_day_of_month(datetime.date.today() + datetime.timedelta(days=365))
+        due = self.last_day_of_month(date_today(DEADLINE_TZINFO) + datetime.timedelta(days=365))
 
         # faulty post
         r = self.client.post(url, { 'prefix': "m1",
@@ -1776,7 +1778,7 @@ class MeetingInfoTests(TestCase):
     def setUp(self):
         super().setUp()
         self.group = GroupFactory.create(type_id='wg')
-        today = datetime.date.today()
+        today = date_today()
         SessionFactory.create(meeting__type_id='ietf',group=self.group,meeting__date=today-datetime.timedelta(days=14))
         self.inprog = SessionFactory.create(meeting__type_id='ietf',group=self.group,meeting__date=today-datetime.timedelta(days=1))
         SessionFactory.create(meeting__type_id='ietf',group=self.group,meeting__date=today+datetime.timedelta(days=90))
@@ -1900,7 +1902,7 @@ class StatusUpdateTests(TestCase):
     def test_view_status_update_for_meeting(self):
         chair = RoleFactory(name_id='chair',group__type_id='wg')
         GroupEventFactory(type='status_update',group=chair.group)
-        sess = SessionFactory.create(meeting__type_id='ietf',group=chair.group,meeting__date=datetime.datetime.today()-datetime.timedelta(days=1))
+        sess = SessionFactory.create(meeting__type_id='ietf',group=chair.group,meeting__date=date_today()-datetime.timedelta(days=1))
         url = urlreverse('ietf.group.views.group_about_status_meeting',kwargs={'acronym':chair.group.acronym,'num':sess.meeting.number}) 
         response = self.client.get(url)
         self.assertEqual(response.status_code,200)

ietf/group/tests_js.py

@@ -7,6 +7,7 @@ import debug                            # pyflakes:ignore
 from ietf.doc.factories import WgDraftFactory
 from ietf.group.factories import GroupFactory, RoleFactory, DatedGroupMilestoneFactory
 from ietf.utils.jstest import IetfSeleniumTestCase, ifSeleniumEnabled, selenium_enabled
+from ietf.utils.timezone import date_today
 
 if selenium_enabled():
     from selenium.common.exceptions import TimeoutException
@@ -68,7 +69,7 @@ class MilestoneTests(IetfSeleniumTestCase):
         draft = WgDraftFactory()
         WgDraftFactory.create_batch(3)  # some drafts to ignore
         description = 'some description'
-        due_date = datetime.date.today() + datetime.timedelta(days=60)
+        due_date = date_today() + datetime.timedelta(days=60)
 
         assert(len(draft.name) > 5)
         draft_search_string = draft.name[-5:]

ietf/group/tests_review.py

@@ -7,7 +7,9 @@ import debug      # pyflakes:ignore
 
 from pyquery import PyQuery
 
+from django.conf import settings
 from django.urls import reverse as urlreverse
+from django.utils import timezone
 
 from ietf.review.policies import get_reviewer_queue_policy
 from ietf.utils.test_utils import login_testing_unauthorized, TestCase, reload_db_objects
@@ -25,6 +27,7 @@ from ietf.person.factories import PersonFactory, EmailFactory
 from ietf.doc.factories import DocumentFactory
 from ietf.group.factories import RoleFactory, ReviewTeamFactory, GroupFactory
 from ietf.review.factories import ReviewRequestFactory, ReviewerSettingsFactory, ReviewAssignmentFactory
+from ietf.utils.timezone import date_today, datetime_today, DEADLINE_TZINFO
 from django.utils.html import escape
 
 class ReviewTests(TestCase):
@@ -131,7 +134,7 @@ class ReviewTests(TestCase):
         doc.states.add(State.objects.get(type="draft-iesg", slug="lc", used=True))
         LastCallDocEvent.objects.create(
             doc=doc,
-            expires=datetime.datetime.now() + datetime.timedelta(days=365),
+            expires=timezone.now() + datetime.timedelta(days=365),
             by=Person.objects.get(name="(System)"),
             rev=doc.rev
         )
@@ -155,7 +158,7 @@ class ReviewTests(TestCase):
             review_request__doc=review_req1.doc,
             review_request__team=review_req1.team,
             review_request__type_id="early",
-            review_request__deadline=datetime.date.today() + datetime.timedelta(days=30),
+            review_request__deadline=date_today(DEADLINE_TZINFO) + datetime.timedelta(days=30),
             review_request__state_id="assigned",
             review_request__requested_by=Person.objects.get(user__username="reviewer"),
             state_id = "accepted",
@@ -165,7 +168,7 @@ class ReviewTests(TestCase):
         UnavailablePeriod.objects.create(
             team=review_req1.team,
             person=reviewer,
-            start_date=datetime.date.today() - datetime.timedelta(days=10),
+            start_date=date_today() - datetime.timedelta(days=10),
             availability="unavailable",
         )
 
@@ -210,7 +213,7 @@ class ReviewTests(TestCase):
             review_request__doc=review_req2.doc,
             review_request__team=review_req2.team,
             review_request__type_id="lc",
-            review_request__deadline=datetime.date.today() - datetime.timedelta(days=30),
+            review_request__deadline=date_today(DEADLINE_TZINFO) - datetime.timedelta(days=30),
             review_request__state_id="assigned",
             review_request__requested_by=Person.objects.get(user__username="reviewer"),
             state_id = "no-response",
@@ -231,15 +234,15 @@ class ReviewTests(TestCase):
         review_req3 = ReviewRequestFactory(state_id='completed', team=team)
         ReviewAssignmentFactory(
             review_request__doc=review_req3.doc,
-            review_request__time=datetime.date.today() - datetime.timedelta(days=30),
+            review_request__time=datetime_today() - datetime.timedelta(days=30),
             review_request__team=review_req3.team,
             review_request__type_id="telechat",
-            review_request__deadline=datetime.date.today() - datetime.timedelta(days=25),
+            review_request__deadline=date_today(DEADLINE_TZINFO) - datetime.timedelta(days=25),
             review_request__state_id="completed",
             review_request__requested_by=Person.objects.get(user__username="reviewer"),
             state_id = "completed",
             reviewer=reviewer.email_set.first(),
-            assigned_on=datetime.date.today() - datetime.timedelta(days=30)
+            assigned_on=datetime_today() - datetime.timedelta(days=30)
         )
         r = self.client.get(url)
         self.assertEqual(r.status_code, 200)
@@ -252,15 +255,15 @@ class ReviewTests(TestCase):
         for i in range(10):
             ReviewAssignmentFactory(
                 review_request__doc=reqs[i].doc,
-                review_request__time=datetime.date.today() - datetime.timedelta(days=i*30),
+                review_request__time=datetime_today() - datetime.timedelta(days=i*30),
                 review_request__team=reqs[i].team,
                 review_request__type_id="telechat",
-                review_request__deadline=datetime.date.today() - datetime.timedelta(days=i*20),
+                review_request__deadline=date_today(DEADLINE_TZINFO) - datetime.timedelta(days=i*20),
                 review_request__state_id="completed",
                 review_request__requested_by=Person.objects.get(user__username="reviewer"),
                 state_id = "completed",
                 reviewer=reviewer.email_set.first(),
-                assigned_on=datetime.date.today() - datetime.timedelta(days=i*30)
+                assigned_on=datetime_today() - datetime.timedelta(days=i*30)
             )
         r = self.client.get(url)
         self.assertEqual(r.status_code, 200)
@@ -304,28 +307,28 @@ class ReviewTests(TestCase):
         review_req4 = ReviewRequestFactory(state_id='completed', team=team)
         ReviewAssignmentFactory(
             review_request__doc=review_req4.doc,
-            review_request__time=datetime.date.today() - datetime.timedelta(days=80),
+            review_request__time=datetime_today() - datetime.timedelta(days=80),
             review_request__team=review_req4.team,
             review_request__type_id="lc",
-            review_request__deadline=datetime.date.today() - datetime.timedelta(days=60),
+            review_request__deadline=date_today(DEADLINE_TZINFO) - datetime.timedelta(days=60),
             review_request__state_id="assigned",
             review_request__requested_by=Person.objects.get(user__username="reviewer"),
             state_id = "accepted",
             reviewer=reviewer.email_set.first(),
-            assigned_on=datetime.date.today() - datetime.timedelta(days=80)
+            assigned_on=datetime_today() - datetime.timedelta(days=80)
         )
         review_req5 = ReviewRequestFactory(state_id='completed', team=team)
         ReviewAssignmentFactory(
             review_request__doc=review_req5.doc,
-            review_request__time=datetime.date.today() - datetime.timedelta(days=120),
+            review_request__time=datetime_today() - datetime.timedelta(days=120),
             review_request__team=review_req5.team,
             review_request__type_id="lc",
-            review_request__deadline=datetime.date.today() - datetime.timedelta(days=100),
+            review_request__deadline=date_today(DEADLINE_TZINFO) - datetime.timedelta(days=100),
             review_request__state_id="assigned",
             review_request__requested_by=Person.objects.get(user__username="reviewer"),
             state_id = "accepted",
             reviewer=reviewer.email_set.first(),
-            assigned_on=datetime.date.today() - datetime.timedelta(days=120)
+            assigned_on=datetime_today() - datetime.timedelta(days=120)
         )
         r = self.client.get(url)
         self.assertEqual(r.status_code, 200)
@@ -429,7 +432,7 @@ class ReviewTests(TestCase):
         doc.states.add(State.objects.get(type="draft-iesg", slug="lc", used=True))
         LastCallDocEvent.objects.create(
             doc=doc,
-            expires=datetime.datetime.now() + datetime.timedelta(days=365),
+            expires=timezone.now() + datetime.timedelta(days=365),
             by=Person.objects.get(name="(System)"),
             rev=doc.rev
         )
@@ -475,7 +478,7 @@ class ReviewTests(TestCase):
         review_req1 = ReviewRequestFactory()
         review_assignment_completed = ReviewAssignmentFactory(review_request=review_req1,reviewer=EmailFactory(person__user__username='marschairman'), state_id='completed', reviewed_rev=0)
         ReviewAssignmentFactory(review_request=review_req1,reviewer=review_assignment_completed.reviewer)
-        TelechatDocEvent.objects.create(telechat_date=datetime.date.today(), type='scheduled_for_telechat', by=review_assignment_completed.reviewer.person, doc=review_req1.doc, rev=0)
+        TelechatDocEvent.objects.create(telechat_date=date_today(settings.TIME_ZONE), type='scheduled_for_telechat', by=review_assignment_completed.reviewer.person, doc=review_req1.doc, rev=0)
 
         DBTemplateFactory.create(path='/group/defaults/email/open_assignments.txt',
                                  type_id='django',
@@ -555,7 +558,7 @@ class ReviewTests(TestCase):
         # get
         r = self.client.get(url)
         self.assertEqual(r.status_code, 200)
-        self.assertEqual(r.context['period_form']['start_date'].initial, datetime.date.today())
+        self.assertEqual(r.context['period_form']['start_date'].initial, date_today())
 
         # set settings
         empty_outbox()
@@ -596,7 +599,7 @@ class ReviewTests(TestCase):
         self.assertEqual(settings.skip_next, 0)
 
         # add unavailable period
-        start_date = datetime.date.today() + datetime.timedelta(days=10)
+        start_date = date_today() + datetime.timedelta(days=10)
         empty_outbox()
         r = self.client.post(url, {
             "action": "add_period",

ietf/group/views.py

@@ -53,6 +53,7 @@ from django.http import HttpResponse, HttpResponseRedirect, Http404, JsonRespons
 from django.shortcuts import render, redirect, get_object_or_404
 from django.template.loader import render_to_string
 from django.urls import reverse as urlreverse
+from django.utils import timezone
 from django.utils.html import escape
 from django.views.decorators.cache import cache_page, cache_control
 
@@ -118,6 +119,7 @@ from ietf.settings import MAILING_LIST_INFO_URL
 from ietf.utils.response import permission_denied
 from ietf.utils.text import strip_suffix
 from ietf.utils import markdown
+from ietf.utils.timezone import date_today, datetime_today, DEADLINE_TZINFO
 
 
 # --- Helpers ----------------------------------------------------------
@@ -566,7 +568,7 @@ def all_status(request):
         if e:
             wg_reports.append(e)
 
-    wg_reports.sort(key=lambda x: (x.group.parent.acronym,datetime.datetime.now()-x.time))
+    wg_reports.sort(key=lambda x: (x.group.parent.acronym,timezone.now()-x.time))
 
     rg_reports = []
     for rg in rgs:
@@ -808,7 +810,7 @@ def email_aliases(request, acronym=None, group_type=None):
 def meetings(request, acronym=None, group_type=None):
     group = get_group_or_404(acronym,group_type) if acronym else None
 
-    four_years_ago = datetime.datetime.now()-datetime.timedelta(days=4*365)
+    four_years_ago = timezone.now()-datetime.timedelta(days=4*365)
 
     sessions = add_event_info_to_session_qs(
         group.session_set.filter(
@@ -972,7 +974,7 @@ def edit(request, group_type=None, acronym=None, action="edit", field=None):
                 try:
                     group = Group.objects.get(acronym=clean["acronym"])
                     save_group_in_history(group)
-                    group.time = datetime.datetime.now()
+                    group.time = timezone.now()
                     group.save()
                 except Group.DoesNotExist:
                     group = Group.objects.create(name=clean["name"],
@@ -1026,7 +1028,7 @@ def edit(request, group_type=None, acronym=None, action="edit", field=None):
                     change_text=title + ' deleted: ' + ", ".join(x.name_and_email() for x in deleted)
                     personnel_change_text+=change_text+"\n"
 
-                    today = datetime.date.today()
+                    today = date_today()
                     for deleted_email in deleted:
                         # Verify the person doesn't have a separate reviewer role for the group with a different address
                         if not group.role_set.filter(name_id='reviewer',person=deleted_email.person).exists():
@@ -1071,7 +1073,7 @@ def edit(request, group_type=None, acronym=None, action="edit", field=None):
                         )
                     ))
 
-            group.time = datetime.datetime.now()
+            group.time = timezone.now()
 
             if changes and not new_group:
                 for attr, new, desc in changes:
@@ -1387,7 +1389,7 @@ def review_requests(request, acronym, group_type=None):
     unassigned_review_requests.sort(key=lambda r: r.doc.name)
 
     open_review_assignments = list(ReviewAssignment.objects.filter(review_request__team=group, state_id__in=('assigned','accepted')).order_by('-assigned_on'))
-    today = datetime.date.today()
+    today = date_today(DEADLINE_TZINFO)
     unavailable_periods = current_unavailable_periods_for_reviewers(group)
     for a in open_review_assignments:
         a.reviewer_unavailable = any(p.availability == "unavailable"
@@ -1420,11 +1422,14 @@ def review_requests(request, acronym, group_type=None):
         }[since]
 
         closed_review_requests = closed_review_requests.filter(
-              Q(reviewrequestdocevent__type='closed_review_request', reviewrequestdocevent__time__gte=datetime.date.today() - date_limit)
-            | Q(reviewrequestdocevent__isnull=True, time__gte=datetime.date.today() - date_limit)
+              Q(reviewrequestdocevent__type='closed_review_request',
+                reviewrequestdocevent__time__gte=datetime_today(DEADLINE_TZINFO) - date_limit)
+            | Q(reviewrequestdocevent__isnull=True, time__gte=datetime_today(DEADLINE_TZINFO) - date_limit)
         ).distinct()
 
-        closed_review_assignments = closed_review_assignments.filter(completed_on__gte = datetime.date.today() - date_limit)
+        closed_review_assignments = closed_review_assignments.filter(
+            completed_on__gte = datetime_today(DEADLINE_TZINFO) - date_limit,
+        )
 
     return render(request, 'group/review_requests.html',
                   construct_group_menu_context(request, group, "review requests", group_type, {
@@ -1455,7 +1460,7 @@ def reviewer_overview(request, acronym, group_type=None):
         unavailable_periods[p.person_id].append(p)
     reviewer_roles = { r.person_id: r for r in Role.objects.filter(group=group, name="reviewer").select_related("email") }
 
-    today = datetime.date.today()
+    today = date_today()
 
     max_closed_reqs = settings.GROUP_REVIEW_MAX_ITEMS_TO_SHOW_IN_REVIEWER_LIST
     days_back = settings.GROUP_REVIEW_DAYS_TO_SHOW_IN_REVIEWER_LIST
@@ -1509,7 +1514,7 @@ def reviewer_overview(request, acronym, group_type=None):
                                     int(math.ceil(d.assignment_to_closure_days)) if d.assignment_to_closure_days is not None else None))
             if d.state in ["completed", "completed_in_time", "completed_late"]:
                 if d.assigned_time is not None:
-                    delta = datetime.datetime.now() - d.assigned_time
+                    delta = timezone.now() - d.assigned_time
                     if d.assignment_to_closure_days is not None:
                         days = int(delta.days - d.assignment_to_closure_days)
                         if days_since > days: days_since = days
@@ -1685,7 +1690,7 @@ def email_open_review_assignments(request, acronym, group_type=None):
             r.section = 'Last calls:'
             r.section_order='1'
         e = r.review_request.doc.latest_event(LastCallDocEvent, type="sent_last_call")
-        r.lastcall_ends = e and e.expires.date().isoformat()
+        r.lastcall_ends = e and e.expires.astimezone(DEADLINE_TZINFO).date().isoformat()
         r.earlier_review = ReviewAssignment.objects.filter(review_request__doc=r.review_request.doc,reviewer__in=r.reviewer.person.email_set.all(),state="completed")
         if r.earlier_review:
             earlier_reviews_formatted = ['-{} {} reviewed'.format(ra.reviewed_rev, ra.review_request.type.slug) for ra in r.earlier_review]
@@ -1833,7 +1838,7 @@ def change_reviewer_settings(request, acronym, reviewer_email, group_type=None):
             period.save()
             update_change_reason(period, "Added unavailability period: {}".format(period))
 
-            today = datetime.date.today()
+            today = date_today()
 
             in_the_past = period.end_date and period.end_date < today
 
@@ -1874,7 +1879,7 @@ def change_reviewer_settings(request, acronym, reviewer_email, group_type=None):
                     period.delete()
                     update_change_reason(period, "Removed unavailability period: {}".format(period))
 
-                    today = datetime.date.today()
+                    today = date_today()
 
                     in_the_past = period.end_date and period.end_date < today
 

ietf/idindex/index.py

@@ -7,10 +7,10 @@
 
 import datetime
 import os
-import pytz
 
 from django.conf import settings
 from django.template.loader import render_to_string
+from django.utils import timezone
 
 import debug    # pyflakes:ignore
 
@@ -296,6 +296,6 @@ def id_index_txt(with_abstracts=False):
 
     return render_to_string("idindex/id_index.txt", {
             'groups': groups,
-            'time': datetime.datetime.now(pytz.UTC).strftime("%Y-%m-%d %H:%M:%S %Z"),
+            'time': timezone.now().astimezone(datetime.timezone.utc).strftime("%Y-%m-%d %H:%M:%S %Z"),
             'with_abstracts': with_abstracts,
             })

ietf/idindex/tests.py

@@ -7,6 +7,7 @@ import datetime
 from pathlib import Path
 
 from django.conf import settings
+from django.utils import timezone
 
 import debug    # pyflakes:ignore
 
@@ -120,7 +121,7 @@ class IndexTests(TestCase):
         draft.set_state(State.objects.get(type="draft", slug="active"))
         draft.set_state(State.objects.get(type="draft-iesg", slug="lc"))
 
-        e = LastCallDocEvent.objects.create(doc=draft, rev=draft.rev, type="sent_last_call", expires=datetime.datetime.now() + datetime.timedelta(days=14), by=draft.ad)
+        e = LastCallDocEvent.objects.create(doc=draft, rev=draft.rev, type="sent_last_call", expires=timezone.now() + datetime.timedelta(days=14), by=draft.ad)
 
         t = get_fields(all_id2_txt())
         self.assertEqual(t[11], e.expires.strftime("%Y-%m-%d"))

ietf/iesg/agenda.py

@@ -17,13 +17,14 @@ from ietf.doc.models import Document, LastCallDocEvent, ConsensusDocEvent
 from ietf.doc.utils_search import fill_in_telechat_date
 from ietf.iesg.models import TelechatDate, TelechatAgendaItem
 from ietf.review.utils import review_assignments_to_list_for_docs
+from ietf.utils.timezone import date_today
 
 def get_agenda_date(date=None):
     if not date:
         try:
             return TelechatDate.objects.active().order_by('date')[0].date
         except IndexError:
-            return datetime.date.today()
+            return date_today()
     else:
         try:
             return TelechatDate.objects.active().get(date=datetime.datetime.strptime(date, "%Y-%m-%d").date()).date

ietf/iesg/feeds.py

@@ -2,12 +2,13 @@
 # -*- coding: utf-8 -*-
 
 
-import datetime
-
+from django.conf import settings
 from django.contrib.syndication.views import Feed
 from django.utils.feedgenerator import Atom1Feed
 
 from ietf.doc.models import Document, TelechatDocEvent
+from ietf.utils.timezone import date_today
+
 
 class IESGAgendaFeed(Feed):
     title = "Documents on Future IESG Telechat Agendas"
@@ -16,7 +17,7 @@ class IESGAgendaFeed(Feed):
     description_template = "iesg/feed_item_description.html"
 
     def items(self):
-        docs = Document.objects.filter(docevent__telechatdocevent__telechat_date__gte=datetime.date.today()).distinct()
+        docs = Document.objects.filter(docevent__telechatdocevent__telechat_date__gte=date_today(settings.TIME_ZONE)).distinct()
         for d in docs:
             d.latest_telechat_event = d.latest_event(TelechatDocEvent, type="scheduled_for_telechat")
         docs = [d for d in docs if d.latest_telechat_event.telechat_date]

ietf/iesg/models.py

@@ -36,8 +36,12 @@
 
 import datetime
 
+from django.conf import settings
 from django.db import models
 
+from ietf.utils.timezone import date_today
+
+
 class TelechatAgendaItem(models.Model):
     TYPE_CHOICES = (
         (1, "Any Other Business (WG News, New Proposals, etc.)"),
@@ -72,11 +76,11 @@ def next_telechat_date():
     dates = TelechatDate.objects.order_by("-date")
     if dates:
         return dates[0].date + datetime.timedelta(days=14)
-    return datetime.date.today()
+    return date_today(settings.TIME_ZONE)
 
 class TelechatDateManager(models.Manager):
     def active(self):
-        return self.get_queryset().filter(date__gte=datetime.date.today())
+        return self.get_queryset().filter(date__gte=date_today(settings.TIME_ZONE))
 
 class TelechatDate(models.Model):
     objects = TelechatDateManager()

ietf/iesg/tests.py

@@ -28,6 +28,7 @@ from ietf.name.models import StreamName
 from ietf.person.models import Person
 from ietf.utils.test_utils import TestCase, login_testing_unauthorized, unicontent
 from ietf.iesg.factories import IESGMgmtItemFactory
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
 
 
 class IESGTests(TestCase):
@@ -58,7 +59,7 @@ class IESGTests(TestCase):
         m = GroupMilestone.objects.create(group=draft.group,
                                           state_id="review",
                                           desc="Test milestone",
-                                          due=datetime.date.today())
+                                          due=date_today(DEADLINE_TZINFO))
 
         url = urlreverse("ietf.iesg.views.milestones_needing_review")
         login_testing_unauthorized(self, "ad", url)
@@ -142,7 +143,7 @@ class IESGAgendaTests(TestCase):
         mgmtitem = self.mgmt_items
 
         # put on agenda
-        date = datetime.date.today() + datetime.timedelta(days=50)
+        date = date_today(settings.TIME_ZONE) + datetime.timedelta(days=50)
         TelechatDate.objects.create(date=date)
         telechat_event = TelechatDocEvent.objects.create(
             type="scheduled_for_telechat",
@@ -430,7 +431,7 @@ class IESGAgendaTests(TestCase):
             self.assertNotIn(d.title, unicontent(r))
         # Add the documents to a past telechat
         by = Person.objects.get(name="Areað Irector")
-        date = datetime.date.today() - datetime.timedelta(days=14)
+        date = date_today(settings.TIME_ZONE) - datetime.timedelta(days=14)
         approved = State.objects.get(type='draft-iesg', slug='approved')
         iesg_eval = State.objects.get(type='draft-iesg', slug='iesg-eva')
         for d in list(self.telechat_docs.values()):
@@ -485,7 +486,7 @@ class IESGAgendaTests(TestCase):
 
     def test_admin_change(self):
         draft = Document.objects.get(name="draft-ietf-mars-test")
-        today = datetime.date.today()
+        today = date_today(settings.TIME_ZONE)
         telechat_date = TelechatDate.objects.get(date=draft.telechat_date())
         url = urlreverse('admin:iesg_telechatdate_change', args=(telechat_date.id,))
         self.client.login(username="secretary", password="secretary+password")

ietf/iesg/views.py

@@ -63,6 +63,7 @@ from ietf.iesg.utils import telechat_page_count
 from ietf.ietfauth.utils import has_role, role_required, user_is_person
 from ietf.person.models import Person
 from ietf.doc.utils_search import fill_in_document_table_attributes, fill_in_telechat_date
+from ietf.utils.timezone import date_today, datetime_from_date
 
 def review_decisions(request, year=None):
     events = DocEvent.objects.filter(type__in=("iesg_disapproved", "iesg_approved"))
@@ -73,9 +74,9 @@ def review_decisions(request, year=None):
         year = int(year)
         events = events.filter(time__year=year)
     else:
-        d = datetime.date.today() - datetime.timedelta(days=185)
+        d = date_today() - datetime.timedelta(days=185)
         d = datetime.date(d.year, d.month, 1)
-        events = events.filter(time__gte=d)
+        events = events.filter(time__gte=datetime_from_date(d))
 
     events = events.select_related("doc", "doc__intended_std_level").order_by("-time", "-id")
 

ietf/ietfauth/management/commands/send_apikey_usage_emails.py

@@ -8,6 +8,7 @@ from textwrap import dedent
 
 from django.conf import settings
 from django.core.management.base import BaseCommand
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -37,7 +38,7 @@ class Command(BaseCommand):
 
         keys = PersonalApiKey.objects.filter(valid=True)
         for key in keys:
-            earliest = datetime.datetime.now() - datetime.timedelta(days=days)
+            earliest = timezone.now() - datetime.timedelta(days=days)
             events = PersonApiKeyEvent.objects.filter(key=key, time__gt=earliest)
             count = events.count()
             events = events[:32]

ietf/ietfauth/tests.py

@@ -28,6 +28,7 @@ from django.urls import reverse as urlreverse
 from django.contrib.auth.models import User
 from django.conf import settings
 from django.template.loader import render_to_string 
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -46,6 +47,8 @@ from ietf.stats.models import MeetingRegistration
 from ietf.utils.decorators import skip_coverage
 from ietf.utils.mail import outbox, empty_outbox, get_payload_text
 from ietf.utils.test_utils import TestCase, login_testing_unauthorized
+from ietf.utils.timezone import date_today
+
 
 import ietf.ietfauth.views
 
@@ -390,7 +393,7 @@ class IetfAuthTests(TestCase):
         self.assertFalse(q('#volunteer-button'))
         self.assertFalse(q('#volunteered'))
 
-        year = datetime.date.today().year
+        year = date_today().year
         nomcom = NomComFactory(group__acronym=f'nomcom{year}',is_accepting_volunteers=True)
         r = self.client.get(url)
         self.assertEqual(r.status_code,200)
@@ -505,7 +508,7 @@ class IetfAuthTests(TestCase):
         UnavailablePeriod.objects.create(
             team=review_req.team,
             person=reviewer,
-            start_date=datetime.date.today() - datetime.timedelta(days=10),
+            start_date=date_today() - datetime.timedelta(days=10),
             availability="unavailable",
         )
 
@@ -750,11 +753,11 @@ class IetfAuthTests(TestCase):
             self.assertContains(r, 'Invalid apikey', status_code=403)
 
             # too long since regular login
-            person.user.last_login = datetime.datetime.now() - datetime.timedelta(days=settings.UTILS_APIKEY_GUI_LOGIN_LIMIT_DAYS+1)
+            person.user.last_login = timezone.now() - datetime.timedelta(days=settings.UTILS_APIKEY_GUI_LOGIN_LIMIT_DAYS+1)
             person.user.save()
             r = self.client.post(key.endpoint, {'apikey':key.hash(), 'dummy':'dummy',})
             self.assertContains(r, 'Too long since last regular login', status_code=400)
-            person.user.last_login = datetime.datetime.now()
+            person.user.last_login = timezone.now()
             person.user.save()
 
             # endpoint mismatch
@@ -783,12 +786,12 @@ class IetfAuthTests(TestCase):
         # apikey usage will be registered)
         count = 2
         # avoid usage across dates
-        if datetime.datetime.now().time() > datetime.time(hour=23, minute=59, second=58):
+        if timezone.now().time() > datetime.time(hour=23, minute=59, second=58):
             time.sleep(2)
         for i in range(count):
             for key in person.apikeys.all():
                 self.client.post(key.endpoint, {'apikey':key.hash(), 'dummy': 'dummy', })
-        date = str(datetime.date.today())
+        date = str(date_today())
 
         empty_outbox()
         cmd = Command()
@@ -905,7 +908,7 @@ class OpenIDConnectTests(TestCase):
             # an additional email
             EmailFactory(person=person)
             email_list = person.email_set.all().values_list('address', flat=True)
-            meeting = MeetingFactory(type_id='ietf', date=datetime.date.today())
+            meeting = MeetingFactory(type_id='ietf', date=date_today())
             MeetingRegistration.objects.create(
                     meeting=meeting, person=None, first_name=person.first_name(), last_name=person.last_name(),
                     email=email_list[0], ticket_type='full_week', reg_type='remote', affiliation='Some Company',

ietf/ietfauth/views.py

@@ -34,9 +34,9 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
+import datetime
 import importlib
 
-from datetime import date as Date, datetime as DateTime
 # needed if we revert to higher barrier for account creation
 #from datetime import datetime as DateTime, timedelta as TimeDelta, date as Date
 from collections import defaultdict
@@ -78,6 +78,7 @@ from ietf.doc.fields import SearchableDocumentField
 from ietf.utils.decorators import person_required
 from ietf.utils.mail import send_mail
 from ietf.utils.validators import validate_external_resource_value
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
 
 # These are needed if we revert to the higher bar for account creation
 
@@ -223,7 +224,7 @@ def profile(request):
     emails = Email.objects.filter(person=person).exclude(address__startswith='unknown-email-').order_by('-active','-time')
     new_email_forms = []
 
-    nc = NomCom.objects.filter(group__acronym__icontains=Date.today().year).first()
+    nc = NomCom.objects.filter(group__acronym__icontains=date_today().year).first()
     if nc and nc.volunteer_set.filter(person=person).exists():
         volunteer_status = 'volunteered'
     elif nc and nc.is_accepting_volunteers:
@@ -455,7 +456,7 @@ def confirm_password_reset(request, auth):
         password = data['password']
         last_login = None
         if data['last_login']:
-            last_login = DateTime.fromtimestamp(data['last_login'])
+            last_login = datetime.datetime.fromtimestamp(data['last_login'], datetime.timezone.utc)
     except django.core.signing.BadSignature:
         raise Http404("Invalid or expired auth")
 
@@ -557,7 +558,7 @@ def review_overview(request):
         reviewer__person__user=request.user,
         state__in=["assigned", "accepted"],
     )
-    today = Date.today()
+    today = date_today(DEADLINE_TZINFO)
     for r in open_review_assignments:
         r.due = max(0, (today - r.review_request.deadline).days)
 

ietf/ipr/factories.py

@@ -5,6 +5,7 @@
 import datetime
 import factory
 
+from django.utils import timezone
 
 from ietf.ipr.models import (
     IprDisclosureBase, HolderIprDisclosure, ThirdPartyIprDisclosure, NonDocSpecificIprDisclosure,
@@ -13,7 +14,7 @@ from ietf.ipr.models import (
 
 def _fake_patent_info():
     return "Date: %s\nNotes: %s\nTitle: %s\nNumber: %s\nInventor: %s\n" % (
-        (datetime.datetime.today()-datetime.timedelta(days=365)).strftime("%Y-%m-%d"),
+        (timezone.now()-datetime.timedelta(days=365)).strftime("%Y-%m-%d"),
         factory.Faker('paragraph'),
         factory.Faker('sentence', nb_words=8),
         'US9999999',

ietf/ipr/mail.py

@@ -3,13 +3,14 @@
 
 
 import base64
-import email
 import datetime
 from dateutil.tz import tzoffset
 import os
-import pytz
 import re
 
+from email import message_from_bytes
+from email.utils import parsedate_tz
+
 from django.template.loader import render_to_string
 from django.utils.encoding import force_text, force_bytes
 
@@ -50,7 +51,7 @@ def parsedate_to_datetime(date):
     http://python.readthedocs.org/en/latest/library/email.util.html
     """
     try:
-        tuple = email.utils.parsedate_tz(date)
+        tuple = parsedate_tz(date)
         if not tuple:
             return None
         tz = tuple[-1]
@@ -62,10 +63,12 @@ def parsedate_to_datetime(date):
 
 def utc_from_string(s):
     date = parsedate_to_datetime(s)
-    if is_aware(date):
-        return date.astimezone(pytz.utc).replace(tzinfo=None)
+    if date is None:
+        return None
+    elif is_aware(date):
+        return date.astimezone(datetime.timezone.utc)
     else:
-        return date
+        return date.replace(tzinfo=datetime.timezone.utc)
 
 # ----------------------------------------------------------------
 # Email Functions
@@ -174,7 +177,7 @@ def process_response_email(msg):
     a matching value in the reply_to field, associated to an IPR disclosure through
     IprEvent.  Create a Message object for the incoming message and associate it to
     the original message via new IprEvent"""
-    message = email.message_from_bytes(force_bytes(msg))
+    message = message_from_bytes(force_bytes(msg))
     to = message.get('To', '')
 
     # exit if this isn't a response we're interested in (with plus addressing)

ietf/ipr/models.py

@@ -2,11 +2,10 @@
 # -*- coding: utf-8 -*-
 
 
-import datetime
-
 from django.conf import settings
 from django.db import models
 from django.urls import reverse
+from django.utils import timezone
 
 from ietf.doc.models import DocAlias, DocEvent
 from ietf.name.models import DocRelationshipName,IprDisclosureStateName,IprLicenseTypeName,IprEventTypeName
@@ -220,7 +219,7 @@ class IprEvent(models.Model):
         """Returns true if it's beyond the response_due date and no response has been
         received"""
         qs = IprEvent.objects.filter(disclosure=self.disclosure,in_reply_to=self.message)
-        if not qs and datetime.datetime.now().date() > self.response_due.date():
+        if not qs and timezone.now().date() > self.response_due.date():
             return True
         else:
             return False

ietf/ipr/tests.py

@@ -8,8 +8,9 @@ import datetime
 from pyquery import PyQuery
 from urllib.parse import quote, urlparse
 
-from django.urls import reverse as urlreverse
 from django.conf import settings
+from django.urls import reverse as urlreverse
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -27,6 +28,7 @@ from ietf.message.models import Message
 from ietf.utils.mail import outbox, empty_outbox, get_payload_text
 from ietf.utils.test_utils import TestCase, login_testing_unauthorized
 from ietf.utils.text import text_to_dict
+from ietf.utils.timezone import date_today
 
 
 def make_data_from_content(content):
@@ -572,7 +574,7 @@ I would like to revoke this declaration.
         self.assertEqual(r.status_code,302)
         self.assertEqual(len(outbox),len_before+2)
         self.assertTrue('george@acme.com' in outbox[len_before]['To'])
-        self.assertIn('posted on '+datetime.date.today().strftime("%Y-%m-%d"), get_payload_text(outbox[len_before]).replace('\n',' '))
+        self.assertIn('posted on '+date_today().strftime("%Y-%m-%d"), get_payload_text(outbox[len_before]).replace('\n',' '))
         self.assertTrue('draft-ietf-mars-test@ietf.org' in outbox[len_before+1]['To'])
         self.assertTrue('mars-wg@ietf.org' in outbox[len_before+1]['Cc'])
         self.assertIn('Secretariat on '+ipr.get_latest_event_submitted().time.strftime("%Y-%m-%d"), get_payload_text(outbox[len_before+1]).replace('\n',' '))
@@ -600,7 +602,7 @@ I would like to revoke this declaration.
         ipr = HolderIprDisclosureFactory()
         url = urlreverse('ietf.ipr.views.email',kwargs={ "id": ipr.id })
         self.client.login(username="secretary", password="secretary+password")
-        yesterday = datetime.date.today() - datetime.timedelta(1)
+        yesterday = date_today() - datetime.timedelta(1)
         data = dict(
             to='joe@test.com',
             frm='ietf-ipr@ietf.org',
@@ -640,7 +642,7 @@ I would like to revoke this declaration.
                 message_string.format(
                     to=addrs.to,
                     cc=addrs.cc,
-                    date=datetime.datetime.now().ctime()
+                    date=timezone.now().ctime()
                 )
             )
             self.assertIsNone(result)
@@ -650,7 +652,7 @@ I would like to revoke this declaration.
 From: joe@test.com
 Date: {}
 Subject: test
-""".format(reply_to, datetime.datetime.now().ctime())
+""".format(reply_to, timezone.now().ctime())
         result = process_response_email(message_string)
 
         self.assertIsInstance(result, Message)
@@ -664,7 +666,7 @@ Subject: test
 From: joe@test.com
 Date: {}
 Subject: test
-""".format(reply_to, datetime.datetime.now().ctime())
+""".format(reply_to, timezone.now().ctime())
         message_bytes = message_string.encode('utf8') + b'\nInvalid stuff: \xfe\xff\n'
         result = process_response_email(message_bytes)
         self.assertIsInstance(result, Message)
@@ -680,7 +682,7 @@ Subject: test
             message_bytes = message_string.format(
                                 to=addrs.to,
                                 cc=addrs.cc,
-                                date=datetime.datetime.now().ctime(),
+                                date=timezone.now().ctime(),
             ).encode('utf8') + b'\nInvalid stuff: \xfe\xff\n'
             result = process_response_email(message_bytes)
             self.assertIsNone(result)

ietf/ipr/views.py

@@ -43,6 +43,7 @@ from ietf.utils.draft_search import normalize_draftname
 from ietf.utils.mail import send_mail, send_mail_message
 from ietf.utils.response import permission_denied
 from ietf.utils.text import text_to_dict
+from ietf.utils.timezone import datetime_from_date, datetime_today, DEADLINE_TZINFO
 
 # ----------------------------------------------------------------
 # Globals
@@ -147,15 +148,14 @@ def ipr_rfc_number(disclosureDate, thirdPartyDisclosureFlag):
     # made on 1993-07-23, which is more than a year after RFC 1310.
 
     # RFC publication date comes from the RFC Editor announcement
-    # TODO: These times are tzinfo=pytz.utc, but disclosure times are offset-naive
     ipr_rfc_pub_datetime = {
-        1310 : datetime.datetime(1992,  3, 13,  0,  0),
-        1802 : datetime.datetime(1994,  3, 23,  0,  0),
-        2026 : datetime.datetime(1996, 10, 29,  0,  0),
-        3668 : datetime.datetime(2004,  2, 18,  0,  0),
-        3979 : datetime.datetime(2005,  3,  2,  2, 23),
-        4879 : datetime.datetime(2007,  4, 10, 18, 21),
-        8179 : datetime.datetime(2017,  5, 31, 23,  1),
+        1310 : datetime.datetime(1992,  3, 13,  0,  0, tzinfo=datetime.timezone.utc),
+        1802 : datetime.datetime(1994,  3, 23,  0,  0, tzinfo=datetime.timezone.utc),
+        2026 : datetime.datetime(1996, 10, 29,  0,  0, tzinfo=datetime.timezone.utc),
+        3668 : datetime.datetime(2004,  2, 18,  0,  0, tzinfo=datetime.timezone.utc),
+        3979 : datetime.datetime(2005,  3,  2,  2, 23, tzinfo=datetime.timezone.utc),
+        4879 : datetime.datetime(2007,  4, 10, 18, 21, tzinfo=datetime.timezone.utc),
+        8179 : datetime.datetime(2017,  5, 31, 23,  1, tzinfo=datetime.timezone.utc),
     }
 
     if disclosureDate < ipr_rfc_pub_datetime[1310]:
@@ -396,7 +396,7 @@ def email(request, id):
                 type_id = 'msgout',
                 by = request.user.person,
                 disclosure = ipr,
-                response_due = form.cleaned_data['response_due'],
+                response_due = datetime_from_date(form.cleaned_data['response_due'], DEADLINE_TZINFO),
                 message = msg,
             )
 
@@ -590,7 +590,7 @@ def notify(request, id, type):
                     type_id = form.cleaned_data['type'],
                     by = request.user.person,
                     disclosure = ipr,
-                    response_due = datetime.datetime.now().date() + datetime.timedelta(days=30),
+                    response_due = datetime_today(DEADLINE_TZINFO) + datetime.timedelta(days=30),
                     message = message,
                 )
             messages.success(request,'Notifications sent')

ietf/liaisons/forms.py

@@ -3,7 +3,7 @@
 
 
 import io
-import datetime, os
+import os
 import operator
 
 from typing import Union            # pyflakes:ignore
@@ -34,6 +34,7 @@ from ietf.person.models import Email
 from ietf.person.fields import SearchableEmailField
 from ietf.doc.models import Document, DocAlias
 from ietf.utils.fields import DatepickerDateField
+from ietf.utils.timezone import date_today, datetime_from_date, DEADLINE_TZINFO
 from functools import reduce
 
 '''
@@ -185,9 +186,12 @@ class SearchLiaisonForm(forms.Form):
             end_date = self.cleaned_data.get('end_date')
             events = None
             if start_date:
-                events = LiaisonStatementEvent.objects.filter(type='posted', time__gte=start_date)
+                events = LiaisonStatementEvent.objects.filter(
+                    type='posted',
+                    time__gte=datetime_from_date(start_date, DEADLINE_TZINFO),
+                )
                 if end_date:
-                    events = events.filter(time__lte=end_date)
+                    events = events.filter(time__lte=datetime_from_date(end_date, DEADLINE_TZINFO))
             elif end_date:
                 events = LiaisonStatementEvent.objects.filter(type='posted', time__lte=end_date)
             if events:
@@ -222,7 +226,7 @@ class LiaisonModelForm(BetterModelForm):
     to_groups.widget.attrs['data-minimum-input-length'] = 0
     deadline = DatepickerDateField(date_format="yyyy-mm-dd", picker_settings={"autoclose": "1" }, label='Deadline', required=True)
     related_to = SearchableLiaisonStatementsField(label='Related Liaison Statement', required=False)
-    submitted_date = DatepickerDateField(date_format="yyyy-mm-dd", picker_settings={"autoclose": "1" }, label='Submission date', required=True, initial=datetime.date.today())
+    submitted_date = DatepickerDateField(date_format="yyyy-mm-dd", picker_settings={"autoclose": "1" }, label='Submission date', required=True, initial=lambda: date_today(DEADLINE_TZINFO))
     attachments = CustomModelMultipleChoiceField(queryset=Document.objects,label='Attachments', widget=ShowAttachmentsWidget, required=False)
     attach_title = forms.CharField(label='Title', required=False)
     attach_file = forms.FileField(label='File', required=False)
@@ -538,7 +542,7 @@ class EditLiaisonForm(LiaisonModelForm):
         super(EditLiaisonForm, self).save(*args,**kwargs)
         if self.has_changed() and 'submitted_date' in self.changed_data:
             event = self.instance.liaisonstatementevent_set.filter(type='submitted').first()
-            event.time = self.cleaned_data.get('submitted_date')
+            event.time = datetime_from_date(self.cleaned_data.get('submitted_date'), DEADLINE_TZINFO)
             event.save()
 
         return self.instance

ietf/liaisons/mails.py

@@ -2,14 +2,14 @@
 # -*- coding: utf-8 -*-
 
 
-import datetime
-
 from django.conf import settings
 from django.template.loader import render_to_string
 
 from ietf.utils.mail import send_mail_text
 from ietf.group.models import Role
 from ietf.mailtrigger.utils import gather_address_lists
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
+
 
 def send_liaison_by_email(request, liaison):
     subject = 'New Liaison Statement, "%s"' % (liaison.title)
@@ -61,7 +61,7 @@ def possibly_send_deadline_reminder(liaison):
         0: 'today'
         }
 
-    days_to_go = (liaison.deadline - datetime.date.today()).days
+    days_to_go = (liaison.deadline - date_today(DEADLINE_TZINFO)).days
     if not (days_to_go < 0 or days_to_go in list(PREVIOUS_DAYS.keys())):
         return None # no reminder
 

ietf/liaisons/management/commands/check_liaison_deadlines.py

@@ -8,13 +8,14 @@ from django.core.management.base import BaseCommand
 
 from ietf.liaisons.models import LiaisonStatement
 from ietf.liaisons.mails import possibly_send_deadline_reminder
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
 
 
 class Command(BaseCommand):
     help = ("Check liaison deadlines and send a reminder if we are close to a deadline")
 
     def handle(self, *args, **options):
-        today = datetime.date.today()
+        today = date_today(DEADLINE_TZINFO)
         cutoff = today - datetime.timedelta(14)
 
         msgs = []

ietf/liaisons/tests.py

@@ -14,6 +14,8 @@ from django.conf import settings
 from django.contrib.auth.models import User
 from django.urls import reverse as urlreverse
 from django.db.models import Q
+from django.utils import timezone
+
 from io import StringIO
 from pyquery import PyQuery
 
@@ -29,6 +31,8 @@ from ietf.person.models import Person
 from ietf.group.models import Group
 from ietf.liaisons.mails import send_sdo_reminder, possibly_send_deadline_reminder
 from ietf.liaisons.views import contacts_from_roles, contact_email_from_role
+from ietf.utils.timezone import date_today, DEADLINE_TZINFO
+
 
 # -------------------------------------------------
 # Helper Functions
@@ -50,7 +54,7 @@ def get_liaison_post_data(type='incoming'):
                 to_contacts='to_contacts@example.com',
                 purpose="info",
                 title="title",
-                submitted_date=datetime.datetime.today().strftime("%Y-%m-%d"),
+                submitted_date=timezone.now().strftime("%Y-%m-%d"),
                 body="body",
                 send="1" )
 
@@ -242,7 +246,7 @@ class ManagementCommandTests(TestCase):
     def test_check_liaison_deadlines(self):
         from django.core.management import call_command
 
-        LiaisonStatementFactory(deadline=datetime.date.today()+datetime.timedelta(days=1))
+        LiaisonStatementFactory(deadline=date_today(DEADLINE_TZINFO)+datetime.timedelta(days=1))
 
         out = io.StringIO()
         mailbox_before = len(outbox)
@@ -310,7 +314,7 @@ class LiaisonManagementTests(TestCase):
         self.assertNotContains(r, 'Private comment')
 
     def test_taken_care_of(self):
-        liaison = LiaisonStatementFactory(deadline=datetime.date.today()+datetime.timedelta(days=1))
+        liaison = LiaisonStatementFactory(deadline=date_today(DEADLINE_TZINFO)+datetime.timedelta(days=1))
 
         url = urlreverse('ietf.liaisons.views.liaison_detail', kwargs=dict(object_id=liaison.pk))
         # normal get
@@ -384,8 +388,8 @@ class LiaisonManagementTests(TestCase):
         self.assertTrue(liaison.liaisonstatementevent_set.filter(type='posted'))
 
     def test_edit_liaison(self):
-        liaison = LiaisonStatementFactory(deadline=datetime.date.today()+datetime.timedelta(days=1))
-        LiaisonStatementEventFactory(statement=liaison,type_id='submitted', time=datetime.datetime.now()-datetime.timedelta(days=1))
+        liaison = LiaisonStatementFactory(deadline=date_today(DEADLINE_TZINFO) + datetime.timedelta(days=1))
+        LiaisonStatementEventFactory(statement=liaison,type_id='submitted', time=timezone.now()-datetime.timedelta(days=1))
         LiaisonStatementEventFactory(statement=liaison,type_id='posted')
         from_group = liaison.from_groups.first()
         to_group = liaison.to_groups.first()
@@ -696,7 +700,7 @@ class LiaisonManagementTests(TestCase):
         from_groups = [ str(g.pk) for g in Group.objects.filter(type="sdo") ]
         to_group = Group.objects.get(acronym="mars")
         submitter = Person.objects.get(user__username="marschairman")
-        today = datetime.date.today()
+        today = date_today()
         related_liaison = liaison
         r = self.client.post(url,
                              dict(from_groups=from_groups,
@@ -775,7 +779,7 @@ class LiaisonManagementTests(TestCase):
         from_group = Group.objects.get(acronym="mars")
         to_group = Group.objects.filter(type="sdo")[0]
         submitter = Person.objects.get(user__username="marschairman")
-        today = datetime.date.today()
+        today = date_today()
         related_liaison = liaison
         r = self.client.post(url,
                              dict(from_groups=str(from_group.pk),
@@ -843,7 +847,7 @@ class LiaisonManagementTests(TestCase):
         from_group = Group.objects.get(acronym="mars")
         to_group = Group.objects.filter(type="sdo")[0]
         submitter = Person.objects.get(user__username="marschairman")
-        today = datetime.date.today()
+        today = date_today()
         r = self.client.post(url,
                              dict(from_groups=str(from_group.pk),
                                   from_contact=submitter.email_address(),
@@ -862,7 +866,7 @@ class LiaisonManagementTests(TestCase):
         self.assertEqual(len(outbox), mailbox_before + 1)
 
     def test_liaison_add_attachment(self):
-        liaison = LiaisonStatementFactory(deadline=datetime.date.today()+datetime.timedelta(days=1))
+        liaison = LiaisonStatementFactory(deadline=date_today()+datetime.timedelta(days=1))
         LiaisonStatementEventFactory(statement=liaison,type_id='submitted')
 
         self.assertEqual(liaison.attachments.count(),0)
@@ -1021,7 +1025,7 @@ class LiaisonManagementTests(TestCase):
         LiaisonStatementEventFactory(type_id='posted', statement__body="Has recently in its body",statement__from_groups=[GroupFactory(type_id='sdo',acronym='ulm'),])
         # Statement 2
         s2 = LiaisonStatementEventFactory(type_id='posted', statement__body="That word does not occur here", statement__title="Nor does it occur here")
-        s2.time=datetime.datetime(2010,1,1)
+        s2.time=datetime.datetime(2010, 1, 1, tzinfo=datetime.timezone.utc)
         s2.save()
 
         # test list only, no search filters
@@ -1148,7 +1152,7 @@ class LiaisonManagementTests(TestCase):
         self.assertTrue('ulm-liaiman@' in outbox[-1]['To'])
 
     def test_send_liaison_deadline_reminder(self):
-        liaison = LiaisonStatementFactory(deadline=datetime.date.today()+datetime.timedelta(days=1))
+        liaison = LiaisonStatementFactory(deadline=date_today(DEADLINE_TZINFO) + datetime.timedelta(days=1))
 
         mailbox_before = len(outbox)
         possibly_send_deadline_reminder(liaison)

ietf/meeting/factories.py

@@ -187,7 +187,9 @@ class TimeSlotFactory(factory.django.DjangoModelFactory):
     
     @factory.lazy_attribute
     def time(self):
-        return datetime.datetime.combine(self.meeting.date,datetime.time(11,0))
+        return self.meeting.tz().localize(
+            datetime.datetime.combine(self.meeting.date, datetime.time(11, 0))
+        )
 
     @factory.lazy_attribute
     def duration(self):

ietf/meeting/fixtures/proceedings_templates.json

@@ -32,7 +32,7 @@
       "comments": "",
       "list_subscribe": "",
       "state": "active",
-      "time": "2012-02-26T00:21:36",
+      "time": "2012-02-26T00:21:36Z",
       "unused_tags": [],
       "list_archive": "",
       "type": "ietf",

ietf/meeting/helpers.py

@@ -17,6 +17,7 @@ from django.contrib.auth.models import AnonymousUser
 from django.urls import reverse
 from django.shortcuts import get_object_or_404
 from django.template.loader import render_to_string
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -42,7 +43,7 @@ def get_meeting(num=None,type_in=['ietf',],days=28):
     if type_in:
         meetings = meetings.filter(type__in=type_in)
     if num == None:
-        meetings = meetings.filter(date__gte=datetime.datetime.today()-datetime.timedelta(days=days)).order_by('date')
+        meetings = meetings.filter(date__gte=timezone.now()-datetime.timedelta(days=days)).order_by('date')
     else:
         meetings = meetings.filter(number=num)
     if meetings.exists():
@@ -51,7 +52,7 @@ def get_meeting(num=None,type_in=['ietf',],days=28):
         raise Http404("No such meeting found: %s" % num)
 
 def get_current_ietf_meeting():
-    meetings = Meeting.objects.filter(type='ietf',date__gte=datetime.datetime.today()-datetime.timedelta(days=31)).order_by('date')
+    meetings = Meeting.objects.filter(type='ietf',date__gte=timezone.now()-datetime.timedelta(days=31)).order_by('date')
     return meetings.first()
 
 def get_current_ietf_meeting_num():
@@ -118,7 +119,10 @@ def preprocess_assignments_for_agenda(assignments_queryset, meeting, extra_prefe
     # assignments = list(assignments_queryset) # make sure we're set in stone
     assignments = assignments_queryset
 
-    meeting_time = datetime.datetime.combine(meeting.date, datetime.time())
+    # meeting_time is meeting-local midnight at the start of the meeting date
+    meeting_time = meeting.tz().localize(
+        datetime.datetime.combine(meeting.date, datetime.time())
+    )
 
     # replace groups with historic counterparts
     groups = [ ]
@@ -1149,11 +1153,15 @@ def sessions_post_cancel(request, sessions):
 
 
 def update_interim_session_assignment(form):
-    """Helper function to create / update timeslot assigned to interim session"""
-    time = datetime.datetime.combine(
-        form.cleaned_data['date'],
-        form.cleaned_data['time'])
+    """Helper function to create / update timeslot assigned to interim session
+
+    form is an InterimSessionModelForm
+    """
     session = form.instance
+    meeting = session.meeting
+    time = meeting.tz().localize(
+        datetime.datetime.combine(form.cleaned_data['date'], form.cleaned_data['time'])
+    )
     if session.official_timeslotassignment():
         slot = session.official_timeslotassignment().timeslot
         slot.time = time
@@ -1161,14 +1169,14 @@ def update_interim_session_assignment(form):
         slot.save()
     else:
         slot = TimeSlot.objects.create(
-            meeting=session.meeting,
+            meeting=meeting,
             type_id='regular',
             duration=session.requested_duration,
             time=time)
         SchedTimeSessAssignment.objects.create(
             timeslot=slot,
             session=session,
-            schedule=session.meeting.schedule)
+            schedule=meeting.schedule)
 
 def populate_important_dates(meeting):
     assert ImportantDate.objects.filter(meeting=meeting).exists() is False

ietf/meeting/management/commands/create_test_meeting.py

@@ -48,7 +48,7 @@ import socket
 import datetime
 import pytz
 
-from django.core.management.base import BaseCommand
+from django.core.management.base import BaseCommand, CommandError
 from django.db import transaction
 from django.db.models import Q
 
@@ -75,10 +75,12 @@ class Command(BaseCommand):
 
     def _meeting_datetime(self, day, *time_args):
         """Generate a datetime on a meeting day"""
-        return datetime.datetime.combine(
-            self.start_date,
-            datetime.time(*time_args)
-        ) + datetime.timedelta(days=day)
+        return self.meeting_tz.localize(
+            datetime.datetime.combine(
+                self.start_date,
+                datetime.time(*time_args)
+            ) + datetime.timedelta(days=day)
+        )
 
     def handle(self, *args, **options):
         if socket.gethostname().split('.')[0] in ['core3', 'ietfa', 'ietfb', 'ietfc', ]:
@@ -87,10 +89,7 @@ class Command(BaseCommand):
         opt_delete = options.get('delete', False)
         opt_use_old_conflicts = options.get('old_conflicts', False)
         self.start_date = options['start_date']
-        meeting_tz = options['tz']
-        if not opt_delete and (meeting_tz not in pytz.common_timezones):
-            self.stderr.write("Warning: {} is not a recognized time zone.".format(meeting_tz))
-
+        meeting_tzname = options['tz']
         if opt_delete:
             if Meeting.objects.filter(number='999').exists():
                 Meeting.objects.filter(number='999').delete()
@@ -98,6 +97,11 @@ class Command(BaseCommand):
             else:
                 self.stderr.write("Test meeting IETF 999 does not exist; nothing to do.\n")
         else:
+            try:
+                self.meeting_tz = pytz.timezone(meeting_tzname)
+            except pytz.UnknownTimeZoneError:
+                raise CommandError("{} is not a recognized time zone.".format(meeting_tzname))
+
             if Meeting.objects.filter(number='999').exists():
                 self.stderr.write("Test meeting IETF 999 already exists; nothing to do.\n")
             else:
@@ -111,7 +115,7 @@ class Command(BaseCommand):
                     type_id='IETF',
                     date=self._meeting_datetime(0).date(),
                     days=7,
-                    time_zone=meeting_tz,
+                    time_zone=meeting_tzname,
                 )
 
                 # Set enabled constraints
@@ -177,6 +181,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1584,  # grow
                     attendees=75,
                     agenda_note="",
@@ -197,6 +202,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2166,  # sidrops
                     attendees=62,
                     agenda_note="",
@@ -221,6 +227,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1452,  # dnsop
                     attendees=160,
                     agenda_note="",
@@ -232,6 +239,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1452,  # dnsop
                     attendees=160,
                     agenda_note="",
@@ -260,6 +268,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1895,  # dnssd
                     attendees=75,
                     agenda_note="Joint with HOMENET",
@@ -271,6 +280,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1895,  # dnssd
                     attendees=75,
                     agenda_note="",
@@ -305,6 +315,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2216,  # lsvr
                     attendees=100,
                     agenda_note="",
@@ -331,6 +342,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2161,  # quic
                     attendees=200,
                     agenda_note="",
@@ -343,6 +355,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2161,  # quic
                     attendees=200,
                     agenda_note="",
@@ -399,6 +412,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1463,  # tsvwg
                     attendees=100,
                     agenda_note="",
@@ -410,6 +424,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1463,  # tsvwg
                     attendees=100,
                     agenda_note="",
@@ -449,6 +464,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1524,  # ccamp
                     attendees=50,
                     agenda_note="",
@@ -473,6 +489,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1763,  # dispatch
                     attendees=80,
                     agenda_note="Joint with ARTAREA",
@@ -514,6 +531,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1578,  # v6ops
                     attendees=100,
                     agenda_note="",
@@ -539,6 +557,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1899,  # stir
                     attendees=60,
                     agenda_note="",
@@ -576,6 +595,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1397,  # pim
                     attendees=30,
                     agenda_note="",
@@ -609,6 +629,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2211,  # suit
                     attendees=80,
                     agenda_note="",
@@ -646,6 +667,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2234,  # coinrg
                     attendees=100,
                     agenda_note="",
@@ -669,6 +691,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1883,  # nwcrg
                     attendees=35,
                     agenda_note="",
@@ -696,6 +719,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1620,  # tcpm
                     attendees=60,
                     agenda_note="",
@@ -721,6 +745,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1089,  # ippm
                     attendees=60,
                     agenda_note="",
@@ -757,6 +782,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2164,  # lamps
                     attendees=45,
                     agenda_note="",
@@ -792,6 +818,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1718,  # httpbis
                     attendees=150,
                     agenda_note="",
@@ -803,6 +830,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1718,  # httpbis
                     attendees=150,
                     agenda_note="",
@@ -826,6 +854,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1924,  # taps
                     attendees=50,
                     agenda_note="",
@@ -873,6 +902,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1958,  # dprive
                     attendees=120,
                     agenda_note="",
@@ -897,6 +927,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2194,  # teep
                     attendees=50,
                     agenda_note="",
@@ -908,6 +939,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2194,  # teep
                     attendees=50,
                     agenda_note="",
@@ -934,6 +966,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=42,  # iccrg
                     attendees=100,
                     agenda_note="",
@@ -959,6 +992,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2231,  # rats
                     attendees=40,
                     agenda_note="",
@@ -970,6 +1004,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2231,  # rats
                     attendees=40,
                     agenda_note="",
@@ -998,6 +1033,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2219,  # secdispatch
                     attendees=200,
                     agenda_note="",
@@ -1033,6 +1069,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1118,  # mboned
                     attendees=30,
                     agenda_note="",
@@ -1061,6 +1098,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1960,  # bess
                     attendees=90,
                     agenda_note="",
@@ -1072,6 +1110,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1960,  # bess
                     attendees=90,
                     agenda_note="",
@@ -1096,6 +1135,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1803,  # homenet
                     attendees=60,
                     agenda_note="Joint with DNSSD",
@@ -1131,6 +1171,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1995,  # acme
                     attendees=70,
                     agenda_note="",
@@ -1154,6 +1195,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2150,  # babel
                     attendees=21,
                     agenda_note="",
@@ -1178,6 +1220,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2215,  # lsr
                     attendees=100,
                     agenda_note="",
@@ -1189,6 +1232,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2215,  # lsr
                     attendees=100,
                     agenda_note="",
@@ -1212,6 +1256,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1575,  # netconf
                     attendees=65,
                     agenda_note="",
@@ -1238,6 +1283,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2145,  # maprg
                     attendees=200,
                     agenda_note="",
@@ -1277,6 +1323,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1897,  # 6lo
                     attendees=55,
                     agenda_note="",
@@ -1315,6 +1362,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1723,  # 6man
                     attendees=120,
                     agenda_note="",
@@ -1326,6 +1374,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1723,  # 6man
                     attendees=120,
                     agenda_note="",
@@ -1351,6 +1400,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1853,  # irtfopen
                     attendees=150,
                     agenda_note="",
@@ -1391,6 +1441,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2148,  # lpwan
                     attendees=75,
                     agenda_note="",
@@ -1421,6 +1472,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1903,  # 6tisch
                     attendees=60,
                     agenda_note="",
@@ -1451,6 +1503,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1751,  # lisp
                     attendees=45,
                     agenda_note="",
@@ -1486,6 +1539,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1764,  # mptcp
                     attendees=50,
                     agenda_note="",
@@ -1510,6 +1564,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1730,  # roll
                     attendees=50,
                     agenda_note="",
@@ -1521,6 +1576,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1730,  # roll
                     attendees=50,
                     agenda_note="",
@@ -1551,6 +1607,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1187,  # saag
                     attendees=150,
                     agenda_note="",
@@ -1596,6 +1653,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1140,  # mpls
                     attendees=100,
                     agenda_note="",
@@ -1630,6 +1688,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1630,  # pce
                     attendees=75,
                     agenda_note="",
@@ -1664,6 +1723,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1962,  # detnet
                     attendees=100,
                     agenda_note="",
@@ -1696,6 +1756,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1744,  # alto
                     attendees=25,
                     agenda_note="",
@@ -1716,6 +1777,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1968,  # gaia
                     attendees=60,
                     agenda_note="",
@@ -1732,6 +1794,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2233,  # git
                     attendees=65,
                     agenda_note="",
@@ -1779,6 +1842,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2227,  # pearg
                     attendees=120,
                     agenda_note="",
@@ -1809,6 +1873,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1326,  # tls
                     attendees=120,
                     agenda_note="",
@@ -1820,6 +1885,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1326,  # tls
                     attendees=120,
                     agenda_note="",
@@ -1854,6 +1920,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1679,  # tsvarea
                     attendees=120,
                     agenda_note="",
@@ -1888,6 +1955,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2169,  # secevent
                     attendees=None,
                     agenda_note="",
@@ -1900,6 +1968,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2209,  # dinrg
                     attendees=90,
                     agenda_note="",
@@ -1921,6 +1990,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1714,  # opsawg
                     attendees=70,
                     agenda_note="Combined OpsAWG / OpsAREA",
@@ -1946,6 +2016,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1812,  # avtcore
                     attendees=30,
                     agenda_note="",
@@ -1978,6 +2049,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1628,  # bfd
                     attendees=50,
                     agenda_note="",
@@ -2007,6 +2079,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1674,  # emu
                     attendees=50,
                     agenda_note="",
@@ -2045,6 +2118,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1988,  # hrpc
                     attendees=100,
                     agenda_note="",
@@ -2068,6 +2142,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2002,  # cose
                     attendees=60,
                     agenda_note="",
@@ -2095,6 +2170,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1996,  # dots
                     attendees=50,
                     agenda_note="",
@@ -2119,6 +2195,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1041,  # idr
                     attendees=75,
                     agenda_note="",
@@ -2130,6 +2207,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1041,  # idr
                     attendees=75,
                     agenda_note="",
@@ -2158,6 +2236,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=945,  # bmwg
                     attendees=30,
                     agenda_note="",
@@ -2185,6 +2264,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2202,  # panrg
                     attendees=75,
                     agenda_note="",
@@ -2219,6 +2299,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=38,  # nmrg
                     attendees=80,
                     agenda_note="",
@@ -2230,6 +2311,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=38,  # nmrg
                     attendees=80,
                     agenda_note="",
@@ -2252,6 +2334,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1665,  # intarea
                     attendees=60,
                     agenda_note="",
@@ -2279,6 +2362,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1817,  # lwig
                     attendees=50,
                     agenda_note="",
@@ -2312,6 +2396,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1619,  # rtgwg
                     attendees=150,
                     agenda_note="",
@@ -2323,6 +2408,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1619,  # rtgwg
                     attendees=150,
                     agenda_note="",
@@ -2344,6 +2430,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2214,  # rift
                     attendees=70,
                     agenda_note="",
@@ -2370,6 +2457,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1905,  # spring
                     attendees=140,
                     agenda_note="",
@@ -2381,6 +2469,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1905,  # spring
                     attendees=140,
                     agenda_note="",
@@ -2401,6 +2490,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=988,  # dhc
                     attendees=25,
                     agenda_note="",
@@ -2429,6 +2519,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1740,  # ipsecme
                     attendees=50,
                     agenda_note="",
@@ -2456,6 +2547,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2146,  # regext
                     attendees=50,
                     agenda_note="",
@@ -2480,6 +2572,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=31,  # cfrg
                     attendees=150,
                     agenda_note="",
@@ -2528,6 +2621,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1849,  # icnrg
                     attendees=80,
                     agenda_note="",
@@ -2555,6 +2649,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1847,  # dmm
                     attendees=45,
                     agenda_note="",
@@ -2574,6 +2669,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2176,  # jmap
                     attendees=20,
                     agenda_note="",
@@ -2608,6 +2704,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1953,  # calext
                     attendees=15,
                     agenda_note="1330 - 1430",
@@ -2631,6 +2728,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2175,  # cbor
                     attendees=50,
                     agenda_note="",
@@ -2675,6 +2773,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2242,  # rum
                     attendees=20,
                     agenda_note="",
@@ -2699,6 +2798,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2220,  # mls
                     attendees=125,
                     agenda_note="",
@@ -2728,6 +2828,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2205,  # extra
                     attendees=15,
                     agenda_note="1430 - 1530",
@@ -2747,6 +2848,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1132,  # manet
                     attendees=20,
                     agenda_note="",
@@ -2766,6 +2868,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1838,  # rmcat
                     attendees=30,
                     agenda_note="",
@@ -2794,6 +2897,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1956,  # anima
                     attendees=80,
                     agenda_note="",
@@ -2805,6 +2909,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1956,  # anima
                     attendees=80,
                     agenda_note="",
@@ -2841,6 +2946,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1642,  # ntp
                     attendees=30,
                     agenda_note="",
@@ -2866,6 +2972,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1748,  # oauth
                     attendees=50,
                     agenda_note="",
@@ -2877,6 +2984,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1748,  # oauth
                     attendees=50,
                     agenda_note="",
@@ -2904,6 +3012,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1869,  # sacm
                     attendees=30,
                     agenda_note="",
@@ -2935,6 +3044,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1964,  # bier
                     attendees=30,
                     agenda_note="",
@@ -2956,6 +3066,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1985,  # teas
                     attendees=100,
                     agenda_note="",
@@ -2983,6 +3094,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1638,  # netmod
                     attendees=100,
                     agenda_note="",
@@ -2994,6 +3106,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1638,  # netmod
                     attendees=100,
                     agenda_note="",
@@ -3015,6 +3128,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1789,  # core
                     attendees=60,
                     agenda_note="",
@@ -3027,6 +3141,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1789,  # core
                     attendees=60,
                     agenda_note="",
@@ -3075,6 +3190,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1991,  # t2trg
                     attendees=90,
                     agenda_note="",
@@ -3122,6 +3238,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1921,  # ace
                     attendees=50,
                     agenda_note="",
@@ -3156,6 +3273,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2254,  # wpack
                     attendees=150,
                     agenda_note="",
@@ -3178,6 +3296,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2260,  # webtrans
                     attendees=100,
                     agenda_note="",
@@ -3199,6 +3318,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2253,  # abcd
                     attendees=200,
                     agenda_note="",
@@ -3215,6 +3335,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2255,  # tmrid
                     attendees=30,
                     agenda_note="",
@@ -3235,6 +3356,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2248,  # mops
                     attendees=100,
                     agenda_note="",
@@ -3262,6 +3384,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2256,  # raw
                     attendees=100,
                     agenda_note="",
@@ -3284,6 +3407,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2257,  # txauth
                     attendees=150,
                     agenda_note="",
@@ -3322,6 +3446,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2252,  # gendispatch
                     attendees=75,
                     agenda_note="",
@@ -3356,6 +3481,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1966,  # dtn
                     attendees=30,
                     agenda_note="",
@@ -3376,6 +3502,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2249,  # lake
                     attendees=100,
                     agenda_note="",
@@ -3397,6 +3524,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2258,  # mathmesh
                     attendees=100,
                     agenda_note="",
@@ -3412,6 +3540,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=2228,  # qirg
                     attendees=50,
                     agenda_note="",
@@ -3433,6 +3562,7 @@ class Command(BaseCommand):
                 s = Session.objects.create(
                     meeting=m,
                     type_id="regular",
+                    purpose_id="regular",
                     group_id=1840,  # nvo3
                     attendees=50,
                     agenda_note="",

ietf/meeting/management/commands/meetecho_conferences.py

@@ -1,7 +1,5 @@
 # Copyright The IETF Trust 2022, All Rights Reserved
 # -*- coding: utf-8 -*-
-import datetime
-
 from textwrap import dedent
 
 from django.conf import settings
@@ -9,6 +7,7 @@ from django.core.management.base import BaseCommand, CommandError
 
 from ietf.meeting.models import Session
 from ietf.utils.meetecho import ConferenceManager, MeetechoAPIError
+from ietf.utils.timezone import date_today
 
 
 class Command(BaseCommand):
@@ -85,7 +84,7 @@ class Command(BaseCommand):
         for conf in confs:
             conf_sessions[conf.id] = Session.objects.filter(
                 group__acronym=group,
-                meeting__date__gte=datetime.date.today(),
+                meeting__date__gte=date_today(),
                 remote_instructions__contains=conf.url,
             )
         return confs, conf_sessions

ietf/meeting/management/commands/update_important_dates.py

@@ -11,6 +11,8 @@ import debug                            # pyflakes:ignore
 from ietf.name.models import ImportantDateName
 from ietf.meeting.helpers import update_important_dates
 from ietf.meeting.models import Meeting, ImportantDate
+from ietf.utils.timezone import date_today
+
 
 class Command(BaseCommand):
 
@@ -29,7 +31,7 @@ class Command(BaseCommand):
             if not meeting:
                 self.stderr.write("\nMeeting not found: %s\n" % (m, ))
                 continue
-            if meeting.date < datetime.date.today() + datetime.timedelta(days=max_offset):
+            if meeting.date < date_today(meeting.tz()) + datetime.timedelta(days=max_offset):
                 self.stderr.write("\nMeeting %s: Won't change dates for meetings in the past or close future\n" % (meeting, ))
                 continue
             self.stdout.write('\n%s\n\n' % (meeting, ))

ietf/meeting/migrations/0056_use_timezone_now_for_meeting_models.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2.28 on 2022-07-12 11:24
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('meeting', '0055_pytz_2022_2_1'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='schedulingevent',
+            name='time',
+            field=models.DateTimeField(default=django.utils.timezone.now, help_text='When the event happened'),
+        ),
+    ]

ietf/meeting/migrations/0057_fill_in_empty_meeting_time_zone.py

@@ -0,0 +1,47 @@
+# Generated by Django 2.2.28 on 2022-08-08 11:37
+
+import datetime
+
+from django.db import migrations
+
+
+# date of last meeting with an empty time_zone before this migration
+LAST_EMPTY_TZ = datetime.date(2022, 7, 1)
+
+
+def forward(apps, schema_editor):
+    Meeting = apps.get_model('meeting', 'Meeting')
+
+    # Check that we will be able to identify the migrated meetings later
+    old_meetings_in_pst8pdt = Meeting.objects.filter(type_id='interim', time_zone='PST8PDT', date__lte=LAST_EMPTY_TZ)
+    assert old_meetings_in_pst8pdt.count() == 0, 'not expecting interim meetings in PST8PDT time_zone'
+
+    meetings_with_empty_tz = Meeting.objects.filter(time_zone='')
+    # check our expected conditions
+    for mtg in meetings_with_empty_tz:
+        assert mtg.type_id == 'interim', 'was not expecting non-interim meetings to be affected'
+        assert mtg.date <= LAST_EMPTY_TZ, 'affected meeting outside expected date range'
+        mtg.time_zone = 'PST8PDT'
+
+    # commit the changes
+    Meeting.objects.bulk_update(meetings_with_empty_tz, ['time_zone'])
+
+
+def reverse(apps, schema_editor):
+    Meeting = apps.get_model('meeting', 'Meeting')
+    meetings_to_restore = Meeting.objects.filter(time_zone='PST8PDT', date__lte=LAST_EMPTY_TZ)
+    for mtg in meetings_to_restore:
+        mtg.time_zone = ''
+    # commit the changes
+    Meeting.objects.bulk_update(meetings_to_restore, ['time_zone'])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('meeting', '0056_use_timezone_now_for_meeting_models'),
+    ]
+
+    operations = [
+        migrations.RunPython(forward, reverse),
+    ]

ietf/meeting/models.py

@@ -24,6 +24,7 @@ from django.db.models import Max, Subquery, OuterRef, TextField, Value, Q
 from django.db.models.functions import Coalesce
 from django.conf import settings
 from django.urls import reverse as urlreverse
+from django.utils import timezone
 from django.utils.text import slugify
 from django.utils.safestring import mark_safe
 
@@ -40,7 +41,7 @@ from ietf.person.models import Person
 from ietf.utils.decorators import memoize
 from ietf.utils.storage import NoLocationMigrationFileSystemStorage
 from ietf.utils.text import xslugify
-from ietf.utils.timezone import date2datetime
+from ietf.utils.timezone import datetime_from_date, date_today
 from ietf.utils.models import ForeignKey
 from ietf.utils.validators import (
     MaxImageSizeValidator, WrappedValidator, validate_file_size, validate_mime_type,
@@ -85,7 +86,7 @@ class Meeting(models.Model):
     # We can't derive time-zone from country, as there are some that have
     # more than one timezone, and the pytz module doesn't provide timezone
     # lookup information for all relevant city/country combinations.
-    time_zone = models.CharField(blank=True, max_length=255, choices=timezones)
+    time_zone = models.CharField(max_length=255, choices=timezones, default='UTC')
     idsubmit_cutoff_day_offset_00 = models.IntegerField(blank=True,
         default=settings.IDSUBMIT_DEFAULT_CUTOFF_DAY_OFFSET_00,
         help_text = "The number of days before the meeting start date when the submission of -00 drafts will be closed.")
@@ -137,46 +138,52 @@ class Meeting(models.Model):
     def end_date(self):
         return self.get_meeting_date(self.days-1)
 
+    def start_datetime(self):
+        """Start-of-day on meeting.date in meeting time zone"""
+        return datetime_from_date(self.date, self.tz())
+
+    def end_datetime(self):
+        """Datetime of the first instant _after_ the meeting's last day in meeting time zone"""
+        return datetime_from_date(self.get_meeting_date(self.days), self.tz())
+
     def get_00_cutoff(self):
-        start_date = datetime.datetime(year=self.date.year, month=self.date.month, day=self.date.day, tzinfo=pytz.utc)
+        """Get the I-D submission 00 cutoff in UTC"""
         importantdate = self.importantdate_set.filter(name_id='idcutoff').first()
         if not importantdate:
             importantdate = self.importantdate_set.filter(name_id='00cutoff').first()
         if importantdate:
             cutoff_date = importantdate.date
         else:
-            cutoff_date = start_date + datetime.timedelta(days=ImportantDateName.objects.get(slug='idcutoff').default_offset_days)
-        cutoff_time = date2datetime(cutoff_date) + self.idsubmit_cutoff_time_utc
+            cutoff_date = self.date + datetime.timedelta(days=ImportantDateName.objects.get(slug='idcutoff').default_offset_days)
+        cutoff_time = datetime_from_date(cutoff_date, datetime.timezone.utc) + self.idsubmit_cutoff_time_utc
         return cutoff_time
 
     def get_01_cutoff(self):
-        start_date = datetime.datetime(year=self.date.year, month=self.date.month, day=self.date.day, tzinfo=pytz.utc)
+        """Get the I-D submission 01 cutoff in UTC"""
         importantdate = self.importantdate_set.filter(name_id='idcutoff').first()
         if not importantdate:
             importantdate = self.importantdate_set.filter(name_id='01cutoff').first()
         if importantdate:
             cutoff_date = importantdate.date
         else:
-            cutoff_date = start_date + datetime.timedelta(days=ImportantDateName.objects.get(slug='idcutoff').default_offset_days)
-        cutoff_time = date2datetime(cutoff_date) + self.idsubmit_cutoff_time_utc
+            cutoff_date = self.date + datetime.timedelta(days=ImportantDateName.objects.get(slug='idcutoff').default_offset_days)
+        cutoff_time = datetime_from_date(cutoff_date, datetime.timezone.utc) + self.idsubmit_cutoff_time_utc
         return cutoff_time
 
     def get_reopen_time(self):
-        start_date = datetime.datetime(year=self.date.year, month=self.date.month, day=self.date.day)
-        local_tz = pytz.timezone(self.time_zone)
-        local_date = local_tz.localize(start_date)
+        """Get the I-D submission reopening time in meeting-local time"""
         cutoff = self.get_00_cutoff()
-        if cutoff.date() == start_date:
+        if cutoff.date() == self.date:
             # no cutoff, so no local-time re-open
             reopen_time = cutoff
         else:
             # reopen time is in local timezone.  May need policy change??  XXX
-            reopen_time = local_date + self.idsubmit_cutoff_time_utc
+            reopen_time = datetime_from_date(self.date, self.tz()) + self.idsubmit_cutoff_time_utc
         return reopen_time
 
     @classmethod
     def get_current_meeting(cls, type="ietf"):
-        return cls.objects.filter(type=type, date__gte=datetime.datetime.today()-datetime.timedelta(days=7) ).order_by('date').first()
+        return cls.objects.filter(type=type, date__gte=timezone.now()-datetime.timedelta(days=7) ).order_by('date').first()
 
     def get_first_cut_off(self):
         return self.get_00_cutoff()
@@ -338,7 +345,7 @@ class Meeting(models.Model):
         for ts in self.timeslot_set.all():
             if ts.location_id is None:
                 continue
-            ymd = ts.time.date()
+            ymd = ts.local_start_time().date()
             if ymd not in time_slices:
                 time_slices[ymd] = []
                 slots[ymd] = []
@@ -346,15 +353,15 @@ class Meeting(models.Model):
 
             if ymd in time_slices:
                 # only keep unique entries
-                if [ts.time, ts.time + ts.duration, ts.duration.seconds] not in time_slices[ymd]:
-                    time_slices[ymd].append([ts.time, ts.time + ts.duration, ts.duration.seconds])
+                if [ts.local_start_time(), ts.local_end_time(), ts.duration.seconds] not in time_slices[ymd]:
+                    time_slices[ymd].append([ts.local_start_time(), ts.local_end_time(), ts.duration.seconds])
                     slots[ymd].append(ts)
 
         days.sort()
         for ymd in time_slices:
             # Make sure these sort the same way
             time_slices[ymd].sort()
-            slots[ymd].sort(key=lambda x: (x.time, x.duration))
+            slots[ymd].sort(key=lambda x: (x.local_start_time(), x.duration))
         return days,time_slices,slots
 
     # this functions makes a list of timeslices and rooms, and
@@ -370,20 +377,24 @@ class Meeting(models.Model):
 #                    SchedTimeSessAssignment.objects.create(schedule = sched,
 #                                                    timeslot = ts)
 
+    def tz(self):
+        if not hasattr(self, '_cached_tz'):
+            self._cached_tz = pytz.timezone(self.time_zone)
+        return self._cached_tz
+
     def vtimezone(self):
-        if self.time_zone:
-            try:
-                tzfn = os.path.join(settings.TZDATA_ICS_PATH, self.time_zone + ".ics")
-                if os.path.exists(tzfn):
-                    with io.open(tzfn) as tzf:
-                        icstext = tzf.read()
-                    vtimezone = re.search("(?sm)(\nBEGIN:VTIMEZONE.*\nEND:VTIMEZONE\n)", icstext).group(1).strip()
-                    if vtimezone:
-                        vtimezone += "\n"
-                    return vtimezone
-            except IOError:
-                pass
-        return ''
+        try:
+            tzfn = os.path.join(settings.TZDATA_ICS_PATH, self.time_zone + ".ics")
+            if os.path.exists(tzfn):
+                with io.open(tzfn) as tzf:
+                    icstext = tzf.read()
+                vtimezone = re.search("(?sm)(\nBEGIN:VTIMEZONE.*\nEND:VTIMEZONE\n)", icstext).group(1).strip()
+                if vtimezone:
+                    vtimezone += "\n"
+                return vtimezone
+        except IOError:
+            pass
+        return None
 
     def set_official_schedule(self, schedule):
         if self.schedule != schedule:
@@ -391,16 +402,14 @@ class Meeting(models.Model):
             self.save()
 
     def updated(self):
-        min_time = datetime.datetime(1970, 1, 1, 0, 0, 0) # should be Meeting.modified, but we don't have that
+        # should be Meeting.modified, but we don't have that
+        min_time = pytz.utc.localize(datetime.datetime(1970, 1, 1, 0, 0, 0))
         timeslots_updated = self.timeslot_set.aggregate(Max('modified'))["modified__max"] or min_time
         sessions_updated = self.session_set.aggregate(Max('modified'))["modified__max"] or min_time
         assignments_updated = min_time
         if self.schedule:
             assignments_updated = SchedTimeSessAssignment.objects.filter(schedule__in=[self.schedule, self.schedule.base if self.schedule else None]).aggregate(Max('modified'))["modified__max"] or min_time
-        ts = max(timeslots_updated, sessions_updated, assignments_updated)
-        tz = pytz.timezone(settings.PRODUCTION_TIMEZONE)
-        ts = tz.localize(ts)
-        return ts
+        return max(timeslots_updated, sessions_updated, assignments_updated)
 
     @memoize
     def previous_meeting(self):
@@ -621,41 +630,22 @@ class TimeSlot(models.Model):
         return self._cached_html_location
 
     def tz(self):
-        if not hasattr(self, '_cached_tz'):
-            if self.meeting.time_zone:
-                self._cached_tz = pytz.timezone(self.meeting.time_zone)
-            else:
-                self._cached_tz = None
-        return self._cached_tz
+        return self.meeting.tz()
 
     def tzname(self):
-        if self.tz():
-            return self.tz().tzname(self.time)
-        else:
-            return ""
+        return self.tz().tzname(self.time)
 
     def utc_start_time(self):
-        if self.tz():
-            local_start_time = self.tz().localize(self.time)
-            return local_start_time.astimezone(pytz.utc)
-        else:
-            return None
+        return self.time.astimezone(pytz.utc)  # USE_TZ is True, so time is aware
 
     def utc_end_time(self):
-        utc_start = self.utc_start_time()
-        # Add duration after converting start time, otherwise errors creep in around DST change
-        return None if utc_start is None else utc_start + self.duration
+        return self.time.astimezone(pytz.utc) + self.duration  # USE_TZ is True, so time is aware
 
     def local_start_time(self):
-        if self.tz():
-            return self.tz().localize(self.time)
-        else:
-            return None
+        return self.time.astimezone(self.tz())
 
     def local_end_time(self):
-        local_start = self.local_start_time()
-        # Add duration after converting start time, otherwise errors creep in around DST change
-        return None if local_start is None else local_start + self.duration
+        return (self.time.astimezone(pytz.utc) + self.duration).astimezone(self.tz())
 
     @property
     def js_identifier(self):
@@ -753,7 +743,7 @@ class Schedule(models.Model):
     @property
     def is_official_record(self):
         return (self.is_official and
-                self.meeting.end_date() <= datetime.date.today() )
+                self.meeting.end_date() <= date_today() )
 
     # returns a dictionary {group -> [schedtimesessassignment+]}
     # and it has [] if the session is not placed.
@@ -1180,7 +1170,7 @@ class Session(models.Model):
         return can_manage_materials(user,self.group)
 
     def is_material_submission_cutoff(self):
-        return datetime.date.today() > self.meeting.get_submission_correction_date()
+        return date_today(datetime.timezone.utc) > self.meeting.get_submission_correction_date()
     
     def joint_with_groups_acronyms(self):
         return [group.acronym for group in self.joint_with_groups.all()]
@@ -1307,7 +1297,7 @@ class Session(models.Model):
 
 class SchedulingEvent(models.Model):
     session = ForeignKey(Session)
-    time = models.DateTimeField(default=datetime.datetime.now, help_text="When the event happened")
+    time = models.DateTimeField(default=timezone.now, help_text="When the event happened")
     status = ForeignKey(SessionStatusName)
     by = ForeignKey(Person)
 

ietf/meeting/test_data.py

@@ -20,11 +20,15 @@ from ietf.name.models import RoomResourceName
 from ietf.person.factories import PersonFactory
 from ietf.person.models import Person
 from ietf.utils.test_data import make_test_data
+from ietf.utils.timezone import date_today
 
-def make_interim_meeting(group,date,status='sched'):
+
+def make_interim_meeting(group,date,status='sched',tz='UTC'):
     system_person = Person.objects.get(name="(System)")
-    time = datetime.datetime.combine(date, datetime.time(9))
-    meeting = create_interim_meeting(group=group,date=date)
+    meeting = create_interim_meeting(group=group,date=date,timezone=tz)
+    time = meeting.tz().localize(
+        datetime.datetime.combine(date, datetime.time(9))
+    )
     session = SessionFactory(meeting=meeting, group=group,
                              attendees=10,
                              requested_duration=datetime.timedelta(minutes=20),
@@ -102,24 +106,37 @@ def make_meeting_test_data(meeting=None, create_interims=False):
 
     # slots
     session_date = meeting.date + datetime.timedelta(days=1)
+    tz = meeting.tz()
     slot1 = TimeSlot.objects.create(meeting=meeting, type_id='regular', location=room,
                                     duration=datetime.timedelta(minutes=60),
-                                    time=datetime.datetime.combine(session_date, datetime.time(9, 30)))
+                                    time=tz.localize(
+                                        datetime.datetime.combine(session_date, datetime.time(9, 30))
+                                    ))
     slot2 = TimeSlot.objects.create(meeting=meeting, type_id='regular', location=room,
                                     duration=datetime.timedelta(minutes=60),
-                                    time=datetime.datetime.combine(session_date, datetime.time(10, 50)))
+                                    time=tz.localize(
+                                        datetime.datetime.combine(session_date, datetime.time(10, 50))
+                                    ))
     breakfast_slot = TimeSlot.objects.create(meeting=meeting, type_id="lead", location=breakfast_room,
                                     duration=datetime.timedelta(minutes=90),
-                                    time=datetime.datetime.combine(session_date, datetime.time(7,0)))
+                                    time=tz.localize(
+                                        datetime.datetime.combine(session_date, datetime.time(7,0))
+                                    ))
     reg_slot = TimeSlot.objects.create(meeting=meeting, type_id="reg", location=reg_room,
                                        duration=datetime.timedelta(minutes=480),
-                                       time=datetime.datetime.combine(session_date, datetime.time(9,0)))
+                                       time=tz.localize(
+                                           datetime.datetime.combine(session_date, datetime.time(9,0))
+                                       ))
     break_slot = TimeSlot.objects.create(meeting=meeting, type_id="break", location=break_room,
                                          duration=datetime.timedelta(minutes=90),
-                                         time=datetime.datetime.combine(session_date, datetime.time(7,0)))
+                                         time=tz.localize(
+                                             datetime.datetime.combine(session_date, datetime.time(7,0))
+                                         ))
     plenary_slot = TimeSlot.objects.create(meeting=meeting, type_id="plenary", location=room,
                                          duration=datetime.timedelta(minutes=60),
-                                         time=datetime.datetime.combine(session_date, datetime.time(11,0)))
+                                         time=tz.localize(
+                                             datetime.datetime.combine(session_date, datetime.time(11,0))
+                                         ))
     # mars WG
     mars = Group.objects.get(acronym='mars')
     mars_session = SessionFactory(meeting=meeting, group=mars,
@@ -201,8 +218,8 @@ def make_meeting_test_data(meeting=None, create_interims=False):
     mars_session.sessionpresentation_set.add(pres)
     
     # Future Interim Meetings
-    date = datetime.date.today() + datetime.timedelta(days=365)
-    date2 = datetime.date.today() + datetime.timedelta(days=1000)
+    date = date_today() + datetime.timedelta(days=365)
+    date2 = date_today() + datetime.timedelta(days=1000)
     ames = Group.objects.get(acronym="ames")
 
     if create_interims:
@@ -213,9 +230,9 @@ def make_meeting_test_data(meeting=None, create_interims=False):
 
     return meeting
 
-def make_interim_test_data():
-    date = datetime.date.today() + datetime.timedelta(days=365)
-    date2 = datetime.date.today() + datetime.timedelta(days=1000)
+def make_interim_test_data(meeting_tz='UTC'):
+    date = date_today() + datetime.timedelta(days=365)
+    date2 = date_today() + datetime.timedelta(days=1000)
     PersonFactory(user__username='plain')
     area = GroupFactory(type_id='area')
     ad = Person.objects.get(user__username='ad')
@@ -225,10 +242,10 @@ def make_interim_test_data():
     RoleFactory(group=mars,person__user__username='marschairman',name_id='chair')
     RoleFactory(group=ames,person__user__username='ameschairman',name_id='chair')
 
-    make_interim_meeting(group=mars,date=date,status='sched')
-    make_interim_meeting(group=mars,date=date2,status='apprw')
-    make_interim_meeting(group=ames,date=date,status='canceled')
-    make_interim_meeting(group=ames,date=date2,status='apprw')
+    make_interim_meeting(group=mars,date=date,status='sched',tz=meeting_tz)
+    make_interim_meeting(group=mars,date=date2,status='apprw',tz=meeting_tz)
+    make_interim_meeting(group=ames,date=date,status='canceled',tz=meeting_tz)
+    make_interim_meeting(group=ames,date=date2,status='apprw',tz=meeting_tz)
 
     return
 

ietf/meeting/tests_helpers.py

@@ -18,6 +18,7 @@ from ietf.meeting.models import SchedTimeSessAssignment, Session
 from ietf.meeting.test_data import make_meeting_test_data
 from ietf.utils.meetecho import Conference
 from ietf.utils.test_utils import TestCase
+from ietf.utils.timezone import date_today
 
 
 # override the legacy office hours setting to guarantee consistency with the tests
@@ -623,12 +624,13 @@ class HelperTests(TestCase):
     def test_get_ietf_meeting(self):
         """get_ietf_meeting() should only return IETF meetings"""
         # put the IETF far in the past so it's not "current"
-        ietf = MeetingFactory(type_id='ietf', date=datetime.date.today() - datetime.timedelta(days=5 * 365))
+        today = date_today()
+        ietf = MeetingFactory(type_id='ietf', date=today- datetime.timedelta(days=5 * 365))
         # put the interim meeting now so it will be picked up as "current" if there's a bug
-        interim = MeetingFactory(type_id='interim', date=datetime.date.today())
+        interim = MeetingFactory(type_id='interim', date=today)
         self.assertEqual(get_ietf_meeting(ietf.number), ietf, 'Return IETF meeting by number')
         self.assertIsNone(get_ietf_meeting(interim.number), 'Ignore non-IETF meetings')
         self.assertIsNone(get_ietf_meeting(), 'Return None if there is no current IETF meeting')
-        ietf.date = datetime.date.today()
+        ietf.date = today
         ietf.save()
         self.assertEqual(get_ietf_meeting(), ietf, 'Return current meeting if there is one')

ietf/meeting/tests_js.py

@@ -10,8 +10,8 @@ import re
 from unittest import skipIf
 
 import django
+from django.utils import timezone
 from django.utils.text import slugify
-from django.utils.timezone import now
 from django.db.models import F
 import pytz
 
@@ -34,7 +34,7 @@ from ietf.meeting.utils import add_event_info_to_session_qs
 from ietf.utils.test_utils import assert_ical_response_is_valid
 from ietf.utils.jstest import ( IetfSeleniumTestCase, ifSeleniumEnabled, selenium_enabled,
                                 presence_of_element_child_by_css_selector )
-from ietf.utils.timezone import timezone_not_near_midnight
+from ietf.utils.timezone import datetime_today, datetime_from_date, date_today, timezone_not_near_midnight
 
 if selenium_enabled():
     from selenium.webdriver.common.action_chains import ActionChains
@@ -269,14 +269,32 @@ class EditMeetingScheduleTests(IetfSeleniumTestCase):
         # modal_open.click()
 
         self.assertTrue(self.driver.find_element(By.CSS_SELECTOR, "#timeslot-group-toggles-modal").is_displayed())
-        self.driver.find_element(By.CSS_SELECTOR, "#timeslot-group-toggles-modal [value=\"{}\"]".format("ts-group-{}-{}".format(slot2.time.strftime("%Y%m%d-%H%M"), int(slot2.duration.total_seconds() / 60)))).click()
+        self.driver.find_element(
+            By.CSS_SELECTOR,
+            "#timeslot-group-toggles-modal [value=\"{}\"]".format(
+                "ts-group-{}-{}".format(
+                    slot2.time.astimezone(slot2.tz()).strftime("%Y%m%d-%H%M"),
+                    int(slot2.duration.total_seconds() / 60),
+                ),
+            ),
+        ).click()
         self.driver.find_element(By.CSS_SELECTOR, "#timeslot-group-toggles-modal [data-bs-dismiss=\"modal\"]").click()
         self.assertTrue(not self.driver.find_element(By.CSS_SELECTOR, "#timeslot-group-toggles-modal").is_displayed())
 
         # swap days
-        self.driver.find_element(By.CSS_SELECTOR, ".day .swap-days[data-dayid=\"{}\"]".format(slot4.time.date().isoformat())).click()
+        self.driver.find_element(
+            By.CSS_SELECTOR,
+            ".day .swap-days[data-dayid=\"{}\"]".format(
+                slot4.time.astimezone(slot4.tz()).date().isoformat(),
+            ),
+        ).click()
         self.assertTrue(self.driver.find_element(By.CSS_SELECTOR, "#swap-days-modal").is_displayed())
-        self.driver.find_element(By.CSS_SELECTOR, "#swap-days-modal input[name=\"target_day\"][value=\"{}\"]".format(slot1.time.date().isoformat())).click()
+        self.driver.find_element(
+            By.CSS_SELECTOR,
+            "#swap-days-modal input[name=\"target_day\"][value=\"{}\"]".format(
+                slot1.time.astimezone(slot1.tz()).date().isoformat(),
+            ),
+        ).click()
         self.driver.find_element(By.CSS_SELECTOR, "#swap-days-modal button[type=\"submit\"]").click()
 
         self.assertTrue(self.driver.find_elements(By.CSS_SELECTOR, '#timeslot{} #session{}'.format(slot4.pk, s1.pk)),
@@ -306,7 +324,7 @@ class EditMeetingScheduleTests(IetfSeleniumTestCase):
         room = RoomFactory(meeting=meeting)
 
         # get current time in meeting time zone
-        right_now = now().astimezone(
+        right_now = timezone.now().astimezone(
             pytz.timezone(meeting.time_zone)
         )
         if not settings.USE_TZ:
@@ -395,14 +413,14 @@ class EditMeetingScheduleTests(IetfSeleniumTestCase):
         wait = WebDriverWait(self.driver, 2)
         meeting = MeetingFactory(
             type_id='ietf',
-            date=datetime.datetime.today() - datetime.timedelta(days=3),
+            date=date=timezone.now() - datetime.timedelta(days=3),
             days=7,
             time_zone=timezone_not_near_midnight(),
         )
         room = RoomFactory(meeting=meeting)
 
         # get current time in meeting time zone
-        right_now = now().astimezone(
+        right_now = timezone.now().astimezone(
             pytz.timezone(meeting.time_zone)
         )
         if not settings.USE_TZ:
@@ -433,21 +451,24 @@ class EditMeetingScheduleTests(IetfSeleniumTestCase):
 
         past_swap_days_buttons = self.driver.find_elements(By.CSS_SELECTOR,
             ','.join(
-                '.swap-days[data-start="{}"]'.format(ts.time.date().isoformat()) for ts in past_timeslots
+                '.swap-days[data-start="{}"]'.format(ts.time.astimezone(ts.tz()).date().isoformat())
+                for ts in past_timeslots
             )
         )
         self.assertEqual(len(past_swap_days_buttons), len(past_timeslots), 'Missing past swap days buttons')
 
         future_swap_days_buttons = self.driver.find_elements(By.CSS_SELECTOR,
             ','.join(
-                '.swap-days[data-start="{}"]'.format(ts.time.date().isoformat()) for ts in future_timeslots
+                '.swap-days[data-start="{}"]'.format(ts.time.astimezone(ts.tz()).date().isoformat())
+                for ts in future_timeslots
             )
         )
         self.assertEqual(len(future_swap_days_buttons), len(future_timeslots), 'Missing future swap days buttons')
 
         now_swap_days_buttons = self.driver.find_elements(By.CSS_SELECTOR,
             ','.join(
-                '.swap-days[data-start="{}"]'.format(ts.time.date().isoformat()) for ts in now_timeslots
+                '.swap-days[data-start="{}"]'.format(ts.time.astimezone(ts.tz()).date().isoformat())
+                for ts in now_timeslots
             )
         )
         # only one "now" button because both sessions are on the same day
@@ -498,7 +519,8 @@ class EditMeetingScheduleTests(IetfSeleniumTestCase):
         self.assertFalse(
             any(radio.is_enabled()
                 for radio in modal.find_elements(By.CSS_SELECTOR, ','.join(
-                'input[name="target_day"][value="{}"]'.format(ts.time.date().isoformat()) for ts in past_timeslots)
+                'input[name="target_day"][value="{}"]'.format(ts.time.astimezone(ts.tz()).date().isoformat())
+                for ts in past_timeslots)
             )),
             'Past day is enabled in swap-days modal for official schedule',
         )
@@ -507,14 +529,16 @@ class EditMeetingScheduleTests(IetfSeleniumTestCase):
         self.assertTrue(
             all(radio.is_enabled()
                 for radio in modal.find_elements(By.CSS_SELECTOR, ','.join(
-                'input[name="target_day"][value="{}"]'.format(ts.time.date().isoformat()) for ts in enabled_timeslots)
+                'input[name="target_day"][value="{}"]'.format(ts.time.astimezone(ts.tz()).date().isoformat())
+                for ts in enabled_timeslots)
             )),
             'Future day is not enabled in swap-days modal for official schedule',
         )
         self.assertFalse(
             any(radio.is_enabled()
                 for radio in modal.find_elements(By.CSS_SELECTOR, ','.join(
-                'input[name="target_day"][value="{}"]'.format(ts.time.date().isoformat()) for ts in now_timeslots)
+                'input[name="target_day"][value="{}"]'.format(ts.time.astimezone(ts.tz()).date().isoformat())
+                for ts in now_timeslots)
             )),
             '"Now" day is enabled in swap-days modal for official schedule',
         )
@@ -522,11 +546,11 @@ class EditMeetingScheduleTests(IetfSeleniumTestCase):
     def test_past_swap_timeslot_col_buttons(self):
         """Swap timeslot column buttons should be hidden for past items"""
         wait = WebDriverWait(self.driver, 2)
-        meeting = MeetingFactory(type_id='ietf', date=datetime.datetime.today() - datetime.timedelta(days=3), days=7)
+        meeting = MeetingFactory(type_id='ietf', date=timezone.now() - datetime.timedelta(days=3), days=7)
         room = RoomFactory(meeting=meeting)
 
         # get current time in meeting time zone
-        right_now = now().astimezone(
+        right_now = timezone.now().astimezone(
             pytz.timezone(meeting.time_zone)
         )
         if not settings.USE_TZ:
@@ -812,7 +836,7 @@ class EditMeetingScheduleTests(IetfSeleniumTestCase):
         To test for recurrence of https://trac.ietf.org/trac/ietfdb/ticket/3327 need to have some constraints that
         do not conflict. Testing with only violated constraints does not exercise the code adequately.
         """
-        meeting = MeetingFactory(type_id='ietf', date=datetime.date.today(), populate_schedule=False)
+        meeting = MeetingFactory(type_id='ietf', date=date_today(), populate_schedule=False)
         TimeSlotFactory.create_batch(5, meeting=meeting)
         schedule = ScheduleFactory(meeting=meeting)
         sessions = SessionFactory.create_batch(5, meeting=meeting, add_to_schedule=False)
@@ -934,7 +958,7 @@ class InterimTests(IetfSeleniumTestCase):
 
         # Create a group with a plenary interim session for testing type filters
         somegroup = GroupFactory(acronym='sg', name='Some Group')
-        sg_interim = make_interim_meeting(somegroup, datetime.date.today() + datetime.timedelta(days=20))
+        sg_interim = make_interim_meeting(somegroup, date_today() + datetime.timedelta(days=20))
         sg_sess = sg_interim.session_set.first()
         sg_slot = sg_sess.timeslotassignments.first().timeslot
         sg_sess.purpose_id = 'plenary'
@@ -966,7 +990,7 @@ class InterimTests(IetfSeleniumTestCase):
             Session.objects.filter(
                 meeting__type_id='interim',
                 timeslotassignments__schedule=F('meeting__schedule'),
-                timeslotassignments__timeslot__time__gte=datetime.datetime.today()
+                timeslotassignments__timeslot__time__gte=timezone.now()
             )
         ).filter(current_status__in=('sched','canceled'))
         meetings = []
@@ -979,7 +1003,7 @@ class InterimTests(IetfSeleniumTestCase):
     def all_ietf_meetings(self):
         meetings = Meeting.objects.filter(
             type_id='ietf',
-            date__gte=datetime.datetime.today()-datetime.timedelta(days=7)
+            date__gte=timezone.now()-datetime.timedelta(days=7)
         )
         for m in meetings:
             m.calendar_label = 'IETF %s' % m.number
@@ -1109,7 +1133,7 @@ class InterimTests(IetfSeleniumTestCase):
         expected_assignments = list(SchedTimeSessAssignment.objects.filter(
             schedule__in=expected_schedules,
             session__in=expected_interim_sessions,
-            timeslot__time__gte=datetime.date.today(),
+            timeslot__time__gte=datetime_today(),
         ))
         # The UID formats should match those in the upcoming.ics template
         expected_uids = [
@@ -1425,7 +1449,7 @@ class ProceedingsMaterialTests(IetfSeleniumTestCase):
     def setUp(self):
         super().setUp()
         self.wait = WebDriverWait(self.driver, 2)
-        self.meeting = MeetingFactory(type_id='ietf', number='123', date=datetime.date.today())
+        self.meeting = MeetingFactory(type_id='ietf', number='123', date=date_today())
 
     def test_add_proceedings_material(self):
         url = self.absreverse(
@@ -1527,7 +1551,7 @@ class EditTimeslotsTests(IetfSeleniumTestCase):
         self.meeting: Meeting = MeetingFactory(
             type_id='ietf',
             number=120,
-            date=datetime.datetime.today() + datetime.timedelta(days=10),
+            date=date_today() + datetime.timedelta(days=10),
             populate_schedule=False,
         )
         self.edit_timeslot_url = self.absreverse(
@@ -1597,22 +1621,23 @@ class EditTimeslotsTests(IetfSeleniumTestCase):
         self.do_delete_timeslot_test(cancel=True)
 
     def do_delete_time_interval_test(self, cancel=False):
-        delete_day = self.meeting.date.date()
+        delete_day = self.meeting.date
         delete_time = datetime.time(hour=10)
-        other_day = self.meeting.get_meeting_date(1).date()
+        other_day = self.meeting.get_meeting_date(1)
         other_time = datetime.time(hour=12)
         duration = datetime.timedelta(minutes=60)
 
         delete: [TimeSlot] = TimeSlotFactory.create_batch(
             2,
             meeting=self.meeting,
-            time=datetime.datetime.combine(delete_day, delete_time),
-            duration=duration)
+            time=datetime_from_date(delete_day, self.meeting.tz()).replace(hour=delete_time.hour),
+            duration=duration,
+        )
 
         keep: [TimeSlot] = [
             TimeSlotFactory(
                 meeting=self.meeting,
-                time=datetime.datetime.combine(day, time),
+                time=datetime_from_date(day, self.meeting.tz()).replace(hour=time.hour),
                 duration=duration
             )
             for (day, time) in (
@@ -1629,7 +1654,9 @@ class EditTimeslotsTests(IetfSeleniumTestCase):
             '[data-col-id="{}T{}-{}"]'.format(
                 delete_day.isoformat(),
                 delete_time.strftime('%H:%M'),
-                (datetime.datetime.combine(delete_day, delete_time) + duration).strftime(
+                self.meeting.tz().localize(
+                    datetime.datetime.combine(delete_day, delete_time) + duration
+                ).strftime(
                     '%H:%M'
                 ))
         )
@@ -1644,22 +1671,22 @@ class EditTimeslotsTests(IetfSeleniumTestCase):
         self.do_delete_time_interval_test(cancel=True)
 
     def do_delete_day_test(self, cancel=False):
-        delete_day = self.meeting.date.date()
-        times = [datetime.time(hour=10), datetime.time(hour=12)]
-        other_days = [self.meeting.get_meeting_date(d).date() for d in range(1, 3)]
+        delete_day = self.meeting.date
+        hours = [10, 12]
+        other_days = [self.meeting.get_meeting_date(d) for d in range(1, 3)]
 
         delete: [TimeSlot] = [
             TimeSlotFactory(
                 meeting=self.meeting,
-                time=datetime.datetime.combine(delete_day, time),
-            ) for time in times
+                time=datetime_from_date(delete_day, self.meeting.tz()).replace(hour=hour),
+            ) for hour in hours
         ]
 
         keep: [TimeSlot] = [
             TimeSlotFactory(
                 meeting=self.meeting,
-                time=datetime.datetime.combine(day, time),
-            ) for day in other_days for time in times
+                time=datetime_from_date(day, self.meeting.tz()).replace(hour=hour),
+            ) for day in other_days for hour in hours
         ]
 
         selector = (

ietf/meeting/tests_models.py

@@ -3,6 +3,8 @@
 """Tests of models in the Meeting application"""
 import datetime
 
+from mock import patch
+
 from ietf.meeting.factories import MeetingFactory, SessionFactory, AttendedFactory
 from ietf.stats.factories import MeetingRegistrationFactory
 from ietf.utils.test_utils import TestCase
@@ -86,6 +88,22 @@ class MeetingTests(TestCase):
         self.assertEqual(att.onsite, 1)
         self.assertEqual(att.remote, 0)
 
+    def test_vtimezone(self):
+        # normal time zone that should have a zoneinfo file
+        meeting = MeetingFactory(type_id='ietf', time_zone='America/Los_Angeles', populate_schedule=False)
+        vtz = meeting.vtimezone()
+        self.assertIsNotNone(vtz)
+        self.assertGreater(len(vtz), 0)
+        # time zone that does not have a zoneinfo file should return None
+        meeting = MeetingFactory(type_id='ietf', time_zone='Fake/Time_Zone', populate_schedule=False)
+        vtz = meeting.vtimezone()
+        self.assertIsNone(vtz)
+        # ioerror trying to read zoneinfo should return None
+        meeting = MeetingFactory(type_id='ietf', time_zone='America/Los_Angeles', populate_schedule=False)
+        with patch('ietf.meeting.models.io.open', side_effect=IOError):
+            vtz = meeting.vtimezone()
+        self.assertIsNone(vtz)
+
 
 class SessionTests(TestCase):
     def test_chat_archive_url_with_jabber(self):

ietf/meeting/tests_schedule_generator.py

@@ -1,6 +1,7 @@
 # Copyright The IETF Trust 2020, All Rights Reserved
 import calendar
 import datetime
+import pytz
 from io import StringIO
 
 from django.core.management.base import CommandError
@@ -36,9 +37,11 @@ class ScheduleGeneratorTest(TestCase):
                     t = TimeSlotFactory(
                         meeting=self.meeting,
                         location=room,
-                        time=datetime.datetime.combine(
-                            self.meeting.date + datetime.timedelta(days=day),
-                            datetime.time(hour, 0),
+                        time=self.meeting.tz().localize(
+                            datetime.datetime.combine(
+                                self.meeting.date + datetime.timedelta(days=day),
+                                datetime.time(hour, 0),
+                            )
                         ),
                         duration=datetime.timedelta(minutes=60),
                     )
@@ -306,8 +309,11 @@ class ScheduleGeneratorTest(TestCase):
            add_to_schedule=False
         )
         # use a timeslot not on Sunday
+        meeting_date = pytz.utc.localize(
+            datetime.datetime.combine(self.meeting.get_meeting_date(1), datetime.time())
+        )
         ts = self.meeting.timeslot_set.filter(
-            time__gt=self.meeting.date + datetime.timedelta(days=1),
+            time__gt=meeting_date,
             location__capacity__lt=base_reg_session.attendees,
         ).order_by(
             'time'

ietf/meeting/tests_views.py

@@ -21,6 +21,7 @@ from urllib.parse import urlparse, urlsplit
 from PIL import Image
 from pathlib import Path
 from tempfile import NamedTemporaryFile
+from zoneinfo import ZoneInfo
 
 from django.urls import reverse as urlreverse
 from django.conf import settings
@@ -29,8 +30,8 @@ from django.test import Client, override_settings
 from django.db.models import F, Max
 from django.http import QueryDict, FileResponse
 from django.template import Context, Template
+from django.utils import timezone
 from django.utils.text import slugify
-from django.utils.timezone import now
 
 import debug           # pyflakes:ignore
 
@@ -51,6 +52,7 @@ from ietf.name.models import SessionStatusName, ImportantDateName, RoleName, Pro
 from ietf.utils.decorators import skip_coverage
 from ietf.utils.mail import outbox, empty_outbox, get_payload_text
 from ietf.utils.test_utils import TestCase, login_testing_unauthorized, unicontent
+from ietf.utils.timezone import date_today, time_now
 
 from ietf.person.factories import PersonFactory
 from ietf.group.factories import GroupFactory, GroupEventFactory, RoleFactory
@@ -154,7 +156,7 @@ class MeetingTests(BaseMeetingTestCase):
         #
         self.write_materials_files(meeting, session)
         #
-        future_year = datetime.date.today().year+1
+        future_year = date_today().year+1
         future_num =  (future_year-1984)*3            # valid for the mid-year meeting
         future_meeting = Meeting.objects.create(date=datetime.date(future_year, 7, 22), number=future_num, type_id='ietf',
                                 city="Panama City", country="PA", time_zone='America/Panama')
@@ -213,7 +215,10 @@ class MeetingTests(BaseMeetingTestCase):
         )
 
         # plain
-        time_interval = r"%s<span.*/span>-%s" % (slot.time.strftime("%H:%M").lstrip("0"), (slot.time + slot.duration).strftime("%H:%M").lstrip("0"))
+        time_interval = r"{}<span.*/span>-{}".format(
+            slot.time.astimezone(meeting.tz()).strftime("%H:%M").lstrip("0"),
+            slot.end_time().astimezone(meeting.tz()).strftime("%H:%M").lstrip("0"),
+        )
 
         # text
         # the rest of the results don't have as nicely formatted times
@@ -351,7 +356,7 @@ class MeetingTests(BaseMeetingTestCase):
     def test_interim_materials(self):
         make_meeting_test_data()
         group = Group.objects.get(acronym='mars')
-        date = datetime.datetime.today() - datetime.timedelta(days=10)
+        date = timezone.now() - datetime.timedelta(days=10)
         meeting = make_interim_meeting(group=group, date=date, status='sched')
         session = meeting.session_set.first()
 
@@ -548,7 +553,12 @@ class MeetingTests(BaseMeetingTestCase):
         a1 = s1.official_timeslotassignment()
         t1 = a1.timeslot
         # Create an extra session
-        t2 = TimeSlotFactory.create(meeting=meeting, time=datetime.datetime.combine(meeting.date, datetime.time(11, 30)))
+        t2 = TimeSlotFactory.create(
+            meeting=meeting,
+            time=meeting.tz().localize(
+                datetime.datetime.combine(meeting.date, datetime.time(11, 30))
+            )
+        )
         s2 = SessionFactory.create(meeting=meeting, group=s1.group, add_to_schedule=False)
         SchedTimeSessAssignment.objects.create(timeslot=t2, session=s2, schedule=meeting.schedule)
         #
@@ -558,16 +568,16 @@ class MeetingTests(BaseMeetingTestCase):
                                       r,
                                       expected_event_summaries=['mars - Martian Special Interest Group'],
                                       expected_event_count=2)
-        self.assertContains(r, t1.time.strftime('%Y%m%dT%H%M%S'))
-        self.assertContains(r, t2.time.strftime('%Y%m%dT%H%M%S'))
+        self.assertContains(r, t1.local_start_time().strftime('%Y%m%dT%H%M%S'))
+        self.assertContains(r, t2.local_start_time().strftime('%Y%m%dT%H%M%S'))
         #
         url = urlreverse('ietf.meeting.views.agenda_ical', kwargs={'num':meeting.number, 'session_id':s1.id, })
         r = self.client.get(url)
         assert_ical_response_is_valid(self, r,
                                       expected_event_summaries=['mars - Martian Special Interest Group'],
                                       expected_event_count=1)
-        self.assertContains(r, t1.time.strftime('%Y%m%dT%H%M%S'))
-        self.assertNotContains(r, t2.time.strftime('%Y%m%dT%H%M%S'))
+        self.assertContains(r, t1.local_start_time().strftime('%Y%m%dT%H%M%S'))
+        self.assertNotContains(r, t2.local_start_time().strftime('%Y%m%dT%H%M%S'))
 
     def test_parse_agenda_filter_params(self):
         def _r(show=(), hide=(), showtypes=(), hidetypes=()):
@@ -673,7 +683,7 @@ class MeetingTests(BaseMeetingTestCase):
         url = urlreverse('ietf.meeting.views.current_materials')
         response = self.client.get(url)
         self.assertEqual(response.status_code, 404)
-        MeetingFactory(type_id='ietf', date=datetime.date.today())
+        MeetingFactory(type_id='ietf', date=date_today())
         response = self.client.get(url)
         self.assertEqual(response.status_code, 302)
 
@@ -818,7 +828,9 @@ class EditMeetingScheduleTests(TestCase):
                     TimeSlotFactory(
                         meeting=meeting,
                         location=room,
-                        time=datetime.datetime.combine(meeting.date, time),
+                        time=meeting.tz().localize(
+                            datetime.datetime.combine(meeting.date, time)
+                        ),
                         duration=datetime.timedelta(minutes=duration),
                     )
 
@@ -889,7 +901,7 @@ class EditMeetingScheduleTests(TestCase):
         # Meeting must be in the future so it can be edited
         meeting = MeetingFactory(
             type_id='ietf',
-            date=datetime.date.today() + datetime.timedelta(days=7),
+            date=date_today() + datetime.timedelta(days=7),
             populate_schedule=False,
         )
         meeting.schedule = ScheduleFactory(meeting=meeting)
@@ -902,7 +914,11 @@ class EditMeetingScheduleTests(TestCase):
         ]
 
         # Set up different sets of timeslots
-        t0 = datetime.datetime.combine(meeting.date, datetime.time(11, 0))
+        # Work with t0 in UTC for arithmetic. This does not change the results but is cleaner if someone looks
+        # at intermediate results which may be misleading until passed through tz.normalize().
+        t0 = meeting.tz().localize(
+            datetime.datetime.combine(meeting.date, datetime.time(11, 0))
+        ).astimezone(pytz.utc)
         dur = datetime.timedelta(hours=2)
         for room in room_groups[0]:
             TimeSlotFactory(meeting=meeting, location=room, duration=dur, time=t0)
@@ -997,7 +1013,7 @@ class EditMeetingScheduleTests(TestCase):
         self.client.login(username=username, password=username + '+password')
 
         # Swap group 0's first and last sessions, first in the past
-        right_now = self._right_now_in(meeting.time_zone)
+        right_now = self._right_now_in(meeting.tz())
         for room in room_groups[0]:
             ts = room.timeslot_set.last()
             ts.time = right_now - datetime.timedelta(minutes=5)
@@ -1179,12 +1195,18 @@ class EditMeetingScheduleTests(TestCase):
         self.client.login(username=username, password=username + '+password')
 
         # Swap group 0's first and last sessions, first in the past
-        right_now = self._right_now_in(meeting.time_zone)
-        yesterday = (right_now - datetime.timedelta(days=1)).date()
-        day_before = (right_now - datetime.timedelta(days=2)).date()
+        right_now = self._right_now_in(meeting.tz())
+        yesterday = right_now.date() - datetime.timedelta(days=1)
+        day_before = right_now.date() - datetime.timedelta(days=2)
         for room in room_groups[0]:
             ts = room.timeslot_set.last()
-            ts.time = datetime.datetime.combine(yesterday, ts.time.time())
+            # Calculation keeps local clock time, shifted to a different day.
+            ts.time = meeting.tz().localize(
+                datetime.datetime.combine(
+                    yesterday,
+                    ts.time.astimezone(meeting.tz()).time()
+                ),
+            )
             ts.save()
         # timeslot_set is ordered by -time, so check that we know which is past/future
         self.assertTrue(room_groups[0][0].timeslot_set.last().time < right_now)
@@ -1218,7 +1240,12 @@ class EditMeetingScheduleTests(TestCase):
         # now with both in the past
         for room in room_groups[0]:
             ts = room.timeslot_set.first()
-            ts.time = datetime.datetime.combine(day_before, ts.time.time())
+            ts.time = meeting.tz().localize(
+                datetime.datetime.combine(
+                    day_before,
+                    ts.time.astimezone(meeting.tz()).time(),
+                )
+            )
             ts.save()
         past_slots = room_groups[0][0].timeslot_set.filter(time__lt=right_now)
         self.assertEqual(len(past_slots), 2, 'Need two timeslots in the past!')
@@ -1241,20 +1268,18 @@ class EditMeetingScheduleTests(TestCase):
             self.fail('Response was not valid JSON: {}'.format(err))
 
     @staticmethod
-    def _right_now_in(tzname):
-        right_now = now().astimezone(pytz.timezone(tzname))
-        if not settings.USE_TZ:
-            right_now = right_now.replace(tzinfo=None)
+    def _right_now_in(tzinfo):
+        right_now = timezone.now().astimezone(tzinfo)
         return right_now
 
     def test_assign_session(self):
         """Allow assignment to future timeslots only for official schedule"""
         meeting = MeetingFactory(
             type_id='ietf',
-            date=(datetime.datetime.today() - datetime.timedelta(days=1)).date(),
+            date=(timezone.now() - datetime.timedelta(days=1)).date(),
             days=3,
         )
-        right_now = self._right_now_in(meeting.time_zone)
+        right_now = self._right_now_in(meeting.tz())
 
         schedules = dict(
             official=meeting.schedule,
@@ -1311,10 +1336,10 @@ class EditMeetingScheduleTests(TestCase):
         """Do not allow assignment of past sessions for official schedule"""
         meeting = MeetingFactory(
             type_id='ietf',
-            date=(datetime.datetime.today() - datetime.timedelta(days=1)).date(),
+            date=(timezone.now() - datetime.timedelta(days=1)).date(),
             days=3,
         )
-        right_now = self._right_now_in(meeting.time_zone)
+        right_now = self._right_now_in(meeting.tz())
 
         schedules = dict(
             official=meeting.schedule,
@@ -1446,10 +1471,10 @@ class EditMeetingScheduleTests(TestCase):
         """Allow unassignment only of future timeslots for official schedule"""
         meeting = MeetingFactory(
             type_id='ietf',
-            date=(datetime.datetime.today() - datetime.timedelta(days=1)).date(),
+            date=(timezone.now() - datetime.timedelta(days=1)).date(),
             days=3,
         )
-        right_now = self._right_now_in(meeting.time_zone)
+        right_now = self._right_now_in(meeting.tz())
 
         schedules = dict(
             official=meeting.schedule,
@@ -1531,7 +1556,7 @@ class EditMeetingScheduleTests(TestCase):
         """Schedule editor should not crash when there are no timeslots"""
         meeting = MeetingFactory(
             type_id='ietf',
-            date=datetime.date.today() + datetime.timedelta(days=7),
+            date=date_today() + datetime.timedelta(days=7),
             populate_schedule=False,
         )
         meeting.schedule = ScheduleFactory(meeting=meeting)
@@ -1545,6 +1570,58 @@ class EditMeetingScheduleTests(TestCase):
         self.assertContains(r, 'No timeslots exist')
         self.assertContains(r, urlreverse('ietf.meeting.views.edit_timeslots', kwargs={'num': meeting.number}))
 
+    def test_editor_time_zone(self):
+        """Agenda editor should show meeting time zone"""
+        time_zone = 'Etc/GMT+8'
+        meeting_tz = ZoneInfo(time_zone)
+        meeting = MeetingFactory(
+            type_id='ietf',
+            date=date_today(meeting_tz) + datetime.timedelta(days=7),
+            populate_schedule=False,
+            time_zone=time_zone,
+        )
+        meeting.schedule = ScheduleFactory(meeting=meeting)
+        meeting.save()
+        timeslot = TimeSlotFactory(meeting=meeting)
+        ts_start = timeslot.time.astimezone(meeting_tz)
+        ts_end = timeslot.end_time().astimezone(meeting_tz)
+        url = urlreverse('ietf.meeting.views.edit_meeting_schedule', kwargs={'num': meeting.number})
+        self.assertTrue(self.client.login(username='secretary', password='secretary+password'))
+        r = self.client.get(url)
+        self.assertEqual(r.status_code, 200)
+        pq = PyQuery(r.content)
+
+        day_header = pq('.day-flow .day-label')
+        self.assertIn(ts_start.strftime('%A'), day_header.text())
+
+        day_swap = day_header.find('.swap-days')
+        self.assertEqual(day_swap.attr('data-dayid'), ts_start.date().isoformat())
+        self.assertEqual(day_swap.attr('data-start'), ts_start.date().isoformat())
+
+        time_label = pq('.day-flow .time-header .time-label')
+        self.assertEqual(len(time_label), 1)
+        # strftime() does not seem to support hours without leading 0, so do this manually
+        time_label_string = f'{ts_start.hour:d}:{ts_start.minute:02d} - {ts_end.hour:d}:{ts_end.minute:02d}'
+        self.assertIn(time_label_string, time_label.text())
+        self.assertEqual(time_label.attr('data-start'), ts_start.astimezone(datetime.timezone.utc).isoformat())
+        self.assertEqual(time_label.attr('data-end'), ts_end.astimezone(datetime.timezone.utc).isoformat())
+
+        ts_swap = time_label.find('.swap-timeslot-col')
+        origin_label = ts_swap.attr('data-origin-label')
+        # testing the exact date in origin_label is hard because Django's date filter uses
+        # different month formats than Python's strftime, so just check a couple parts.
+        self.assertIn(ts_start.strftime('%A'), origin_label)
+        self.assertIn(f'{ts_start.hour:d}:{ts_start.minute:02d}-{ts_end.hour:d}:{ts_end.minute:02d}', origin_label)
+
+        timeslot_elt = pq(f'#timeslot{timeslot.pk}')
+        self.assertEqual(len(timeslot_elt), 1)
+        self.assertEqual(timeslot_elt.attr('data-start'), ts_start.astimezone(datetime.timezone.utc).isoformat())
+        self.assertEqual(timeslot_elt.attr('data-end'), ts_end.astimezone(datetime.timezone.utc).isoformat())
+
+        timeslot_label = pq(f'#timeslot{timeslot.pk} .time-label')
+        self.assertEqual(len(timeslot_label), 1)
+        self.assertIn(time_label_string, timeslot_label.text())
+
 
 class EditTimeslotsTests(TestCase):
     def login(self, username='secretary'):
@@ -1570,7 +1647,7 @@ class EditTimeslotsTests(TestCase):
         return MeetingFactory(
             type_id='ietf',
             number=number,
-            date=datetime.datetime.today() + datetime.timedelta(days=10),
+            date=date_today() + datetime.timedelta(days=10),
             populate_schedule=False,
         )
 
@@ -1602,7 +1679,8 @@ class EditTimeslotsTests(TestCase):
         meeting = self.create_bare_meeting(number=number)
         RoomFactory.create_batch(8, meeting=meeting)
         self.create_initial_schedule(meeting)
-        return meeting
+        # retrieve meeting from DB so it goes through Django's processing
+        return Meeting.objects.get(pk=meeting.pk)
 
     def test_view_permissions(self):
         """Only the secretary should be able to edit timeslots"""
@@ -1771,7 +1849,7 @@ class EditTimeslotsTests(TestCase):
         meeting = self.create_meeting()
         # add some timeslots
         times = [datetime.time(hour=h) for h in (11, 14)]
-        days = [meeting.get_meeting_date(ii).date() for ii in range(meeting.days)]
+        days = [meeting.get_meeting_date(ii) for ii in range(meeting.days)]
 
         timeslots = []
         duration = datetime.timedelta(minutes=90)
@@ -1781,7 +1859,7 @@ class EditTimeslotsTests(TestCase):
                     TimeSlotFactory(
                         meeting=meeting,
                         location=room,
-                        time=datetime.datetime.combine(day, t),
+                        time=meeting.tz().localize(datetime.datetime.combine(day, t)),
                         duration=duration,
                     )
                     for t in times
@@ -1862,17 +1940,21 @@ class EditTimeslotsTests(TestCase):
             TimeSlotFactory(
                 meeting=meeting,
                 location=meeting.room_set.first(),
-                time=datetime.datetime.combine(
-                    meeting.get_meeting_date(day).date(),
-                    datetime.time(hour=11)
+                time=meeting.tz().localize(
+                    datetime.datetime.combine(
+                        meeting.get_meeting_date(day),
+                        datetime.time(hour=11),
+                    )
                 ),
             )
             TimeSlotFactory(
                 meeting=meeting,
                 location=meeting.room_set.first(),
-                time=datetime.datetime.combine(
-                    meeting.get_meeting_date(day).date(),
-                    datetime.time(hour=14)
+                time=meeting.tz().localize(
+                    datetime.datetime.combine(
+                        meeting.get_meeting_date(day),
+                        datetime.time(hour=14),
+                    )
                 ),
             )
 
@@ -1971,10 +2053,8 @@ class EditTimeslotsTests(TestCase):
 
         name_before = 'Name Classic (tm)'
         type_before = 'regular'
-        time_before = datetime.datetime.combine(
-            meeting.date,
-            datetime.time(hour=10),
-        )
+        time_utc = pytz.utc.localize(datetime.datetime.combine(meeting.date, datetime.time(hour=10)))
+        time_before = time_utc.astimezone(meeting.tz())
         duration_before = datetime.timedelta(minutes=60)
         show_location_before = True
         location_before = meeting.room_set.first()
@@ -1991,7 +2071,7 @@ class EditTimeslotsTests(TestCase):
         self.login()
         name_after = 'New Name (tm)'
         type_after = 'plenary'
-        time_after = time_before + datetime.timedelta(days=1, hours=2)
+        time_after = (time_utc + datetime.timedelta(days=1, hours=2)).astimezone(meeting.tz())
         duration_after = duration_before * 2
         show_location_after = False
         location_after = meeting.room_set.last()
@@ -2171,8 +2251,8 @@ class EditTimeslotsTests(TestCase):
         ts = meeting.timeslot_set.exclude(pk__in=timeslots_before).first()  # only 1
         self.assertEqual(ts.name, post_data['name'])
         self.assertEqual(ts.type_id, post_data['type'])
-        self.assertEqual(str(ts.time.date().toordinal()), post_data['days'])
-        self.assertEqual(ts.time.strftime('%H:%M'), post_data['time'])
+        self.assertEqual(str(ts.local_start_time().date().toordinal()), post_data['days'])
+        self.assertEqual(ts.local_start_time().strftime('%H:%M'), post_data['time'])
         self.assertEqual(str(ts.duration), '{}:00'.format(post_data['duration']))  # add seconds
         self.assertEqual(ts.show_location, post_data['show_location'])
         self.assertEqual(str(ts.location.pk), post_data['locations'])
@@ -2181,7 +2261,7 @@ class EditTimeslotsTests(TestCase):
         """Creating a single timeslot outside the official meeting days should work"""
         meeting = self.create_meeting()
         timeslots_before = set(ts.pk for ts in meeting.timeslot_set.all())
-        other_date = meeting.get_meeting_date(-7).date()
+        other_date = meeting.get_meeting_date(-7)
         post_data = dict(
             name='some name',
             type='regular',
@@ -2204,8 +2284,8 @@ class EditTimeslotsTests(TestCase):
         ts = meeting.timeslot_set.exclude(pk__in=timeslots_before).first()  # only 1
         self.assertEqual(ts.name, post_data['name'])
         self.assertEqual(ts.type_id, post_data['type'])
-        self.assertEqual(ts.time.date(), other_date)
-        self.assertEqual(ts.time.strftime('%H:%M'), post_data['time'])
+        self.assertEqual(ts.local_start_time().date(), other_date)
+        self.assertEqual(ts.local_start_time().strftime('%H:%M'), post_data['time'])
         self.assertEqual(str(ts.duration), '{}:00'.format(post_data['duration']))  # add seconds
         self.assertEqual(ts.show_location, post_data['show_location'])
         self.assertEqual(str(ts.location.pk), post_data['locations'])
@@ -2419,8 +2499,8 @@ class EditTimeslotsTests(TestCase):
         """Creating multiple timeslots should work"""
         meeting = self.create_meeting()
         timeslots_before = set(ts.pk for ts in meeting.timeslot_set.all())
-        days = [meeting.get_meeting_date(n).date() for n in range(meeting.days)]
-        other_date = meeting.get_meeting_date(-1).date()  # date before start of meeting
+        days = [meeting.get_meeting_date(n) for n in range(meeting.days)]
+        other_date = meeting.get_meeting_date(-1)  # date before start of meeting
         self.assertNotIn(other_date, days)
         locations = meeting.room_set.all()
         post_data = dict(
@@ -2450,10 +2530,10 @@ class EditTimeslotsTests(TestCase):
         for ts in meeting.timeslot_set.exclude(pk__in=timeslots_before):
             self.assertEqual(ts.name, post_data['name'])
             self.assertEqual(ts.type_id, post_data['type'])
-            self.assertEqual(ts.time.strftime('%H:%M'), post_data['time'])
+            self.assertEqual(ts.local_start_time().strftime('%H:%M'), post_data['time'])
             self.assertEqual(str(ts.duration), '{}:00'.format(post_data['duration']))  # add seconds
             self.assertEqual(ts.show_location, post_data['show_location'])
-            self.assertIn(ts.time.date(), days)
+            self.assertIn(ts.local_start_time().date(), days)
             self.assertIn(ts.location, locations)
             self.assertIn((ts.time.date(), ts.location), day_locs,
                           'Duplicated day / location found')
@@ -2593,7 +2673,7 @@ class ReorderSlidesTests(TestCase):
     def test_add_slides_to_session(self):
         for type_id in ('ietf','interim'):
             chair_role = RoleFactory(name_id='chair')
-            session = SessionFactory(group=chair_role.group, meeting__date=datetime.date.today()-datetime.timedelta(days=90), meeting__type_id=type_id)
+            session = SessionFactory(group=chair_role.group, meeting__date=date_today() - datetime.timedelta(days=90), meeting__type_id=type_id)
             slides = DocumentFactory(type_id='slides')
             url = urlreverse('ietf.meeting.views.ajax_add_slides_to_session', kwargs={'session_id':session.pk, 'num':session.meeting.number})
 
@@ -2609,7 +2689,7 @@ class ReorderSlidesTests(TestCase):
             self.assertEqual(r.status_code, 403)
             self.assertIn('materials cutoff', unicontent(r))
 
-            session.meeting.date = datetime.date.today()
+            session.meeting.date = date_today()
             session.meeting.save()
 
             # Invalid order
@@ -2696,7 +2776,7 @@ class ReorderSlidesTests(TestCase):
     def test_remove_slides_from_session(self):
         for type_id in ['ietf','interim']:
             chair_role = RoleFactory(name_id='chair')
-            session = SessionFactory(group=chair_role.group, meeting__date=datetime.date.today()-datetime.timedelta(days=90), meeting__type_id=type_id)
+            session = SessionFactory(group=chair_role.group, meeting__date=date_today()-datetime.timedelta(days=90), meeting__type_id=type_id)
             slides = DocumentFactory(type_id='slides')
             url = urlreverse('ietf.meeting.views.ajax_remove_slides_from_session', kwargs={'session_id':session.pk, 'num':session.meeting.number})
 
@@ -2712,7 +2792,7 @@ class ReorderSlidesTests(TestCase):
             self.assertEqual(r.status_code, 403)
             self.assertIn('materials cutoff', unicontent(r))
 
-            session.meeting.date = datetime.date.today()
+            session.meeting.date = date_today()
             session.meeting.save()
 
             # Invalid order
@@ -2807,7 +2887,7 @@ class ReorderSlidesTests(TestCase):
 
     def test_reorder_slides_in_session(self):
         chair_role = RoleFactory(name_id='chair')
-        session = SessionFactory(group=chair_role.group, meeting__date=datetime.date.today()-datetime.timedelta(days=90))
+        session = SessionFactory(group=chair_role.group, meeting__date=date_today() - datetime.timedelta(days=90))
         sp_list = SessionPresentationFactory.create_batch(5, document__type_id='slides', session=session)
         for num, sp in enumerate(sp_list, start=1):
             sp.order = num
@@ -2817,7 +2897,7 @@ class ReorderSlidesTests(TestCase):
         for type_id in ['ietf','interim']:
             
             session.meeting.type_id = type_id
-            session.meeting.date = datetime.date.today()-datetime.timedelta(days=90)
+            session.meeting.date = date_today()-datetime.timedelta(days=90)
             session.meeting.save()
 
             # Not a valid user
@@ -2832,7 +2912,7 @@ class ReorderSlidesTests(TestCase):
             self.assertEqual(r.status_code, 403)
             self.assertIn('materials cutoff', unicontent(r))
 
-            session.meeting.date = datetime.date.today()
+            session.meeting.date = date_today()
             session.meeting.save()
 
             # Bad index values
@@ -2899,7 +2979,7 @@ class ReorderSlidesTests(TestCase):
 
     def test_slide_order_reconditioning(self):
         chair_role = RoleFactory(name_id='chair')
-        session = SessionFactory(group=chair_role.group, meeting__date=datetime.date.today()-datetime.timedelta(days=90))
+        session = SessionFactory(group=chair_role.group, meeting__date=date_today() - datetime.timedelta(days=90))
         sp_list = SessionPresentationFactory.create_batch(5, document__type_id='slides', session=session)
         for num, sp in enumerate(sp_list, start=1):
             sp.order = 2*num
@@ -2918,7 +2998,7 @@ class EditTests(TestCase):
 
     def test_official_record_schedule_is_read_only(self):
         def _set_date_offset_and_retrieve_page(meeting, days_offset, client):
-            meeting.date = datetime.date.today() + datetime.timedelta(days=days_offset)
+            meeting.date = date_today() + datetime.timedelta(days=days_offset)
             meeting.save()
             client.login(username="secretary", password="secretary+password")
             url = urlreverse("ietf.meeting.views.edit_meeting_schedule", kwargs=dict(num=meeting.number))
@@ -3001,7 +3081,9 @@ class EditTests(TestCase):
         room = Room.objects.get(meeting=meeting, session_types='regular')
         base_timeslot = TimeSlot.objects.create(meeting=meeting, type_id='regular', location=room,
                                                 duration=datetime.timedelta(minutes=50),
-                                                time=datetime.datetime.combine(meeting.date + datetime.timedelta(days=2), datetime.time(9, 30)))
+                                                time=meeting.tz().localize(
+                                                    datetime.datetime.combine(meeting.date + datetime.timedelta(days=2), datetime.time(9, 30))
+                                                ))
 
         timeslots = list(TimeSlot.objects.filter(meeting=meeting, type='regular').order_by('time'))
 
@@ -3223,7 +3305,12 @@ class EditTests(TestCase):
         self.assertIn("#scroll=1234", r['Location'])
 
         test_timeslot = TimeSlot.objects.get(meeting=meeting, name="IETF Testing")
-        self.assertEqual(test_timeslot.time, datetime.datetime.combine(meeting.date, datetime.time(8, 30)))
+        self.assertEqual(
+            test_timeslot.time,
+            meeting.tz().localize(
+                datetime.datetime.combine(meeting.date, datetime.time(8, 30))
+            ),
+        )
         self.assertEqual(test_timeslot.duration, datetime.timedelta(hours=1, minutes=30))
         self.assertEqual(test_timeslot.location_id, break_room.pk)
         self.assertEqual(test_timeslot.show_location, True)
@@ -3265,7 +3352,12 @@ class EditTests(TestCase):
         })
         self.assertNoFormPostErrors(r)
         test_timeslot.refresh_from_db()
-        self.assertEqual(test_timeslot.time, datetime.datetime.combine(meeting.date, datetime.time(9, 30)))
+        self.assertEqual(
+            test_timeslot.time,
+            meeting.tz().localize(
+                datetime.datetime.combine(meeting.date, datetime.time(9, 30))
+            ),
+        )
         self.assertEqual(test_timeslot.duration, datetime.timedelta(hours=1))
         self.assertEqual(test_timeslot.location_id, breakfast_room.pk)
         self.assertEqual(test_timeslot.show_location, False)
@@ -3710,7 +3802,7 @@ class SessionDetailsTests(TestCase):
     def test_session_details(self):
 
         group = GroupFactory.create(type_id='wg',state_id='active')
-        session = SessionFactory.create(meeting__type_id='ietf',group=group, meeting__date=datetime.date.today()+datetime.timedelta(days=90))
+        session = SessionFactory.create(meeting__type_id='ietf',group=group, meeting__date=date_today() + datetime.timedelta(days=90))
         SessionPresentationFactory.create(session=session,document__type_id='draft',rev=None)
         SessionPresentationFactory.create(session=session,document__type_id='minutes')
         SessionPresentationFactory.create(session=session,document__type_id='slides')
@@ -3729,7 +3821,7 @@ class SessionDetailsTests(TestCase):
         session = SessionFactory.create(
             meeting__type_id='ietf',
             group=group,
-            meeting__date=datetime.date.today() + datetime.timedelta(days=90),
+            meeting__date=date_today() + datetime.timedelta(days=90),
         )
         session_details_url = urlreverse(
             'ietf.meeting.views.session_details',
@@ -3781,7 +3873,7 @@ class SessionDetailsTests(TestCase):
     def test_session_details_past_interim(self):
         group = GroupFactory.create(type_id='wg',state_id='active')
         chair = RoleFactory(name_id='chair',group=group)
-        session = SessionFactory.create(meeting__type_id='interim',group=group, meeting__date=datetime.date.today()-datetime.timedelta(days=90))
+        session = SessionFactory.create(meeting__type_id='interim',group=group, meeting__date=date_today() - datetime.timedelta(days=90))
         SessionPresentationFactory.create(session=session,document__type_id='draft',rev=None)
         SessionPresentationFactory.create(session=session,document__type_id='minutes')
         SessionPresentationFactory.create(session=session,document__type_id='slides')
@@ -3800,7 +3892,7 @@ class SessionDetailsTests(TestCase):
         group = GroupFactory.create(type_id='wg',state_id='active')
         group_chair = PersonFactory.create()
         group.role_set.create(name_id='chair',person = group_chair, email = group_chair.email())
-        session = SessionFactory.create(meeting__type_id='ietf',group=group, meeting__date=datetime.date.today()+datetime.timedelta(days=90))
+        session = SessionFactory.create(meeting__type_id='ietf',group=group, meeting__date=date_today() + datetime.timedelta(days=90))
         SessionPresentationFactory.create(session=session,document__type_id='draft',rev=None)
         old_draft = session.sessionpresentation_set.filter(document__type='draft').first().document
         new_draft = DocumentFactory(type_id='draft')
@@ -3966,7 +4058,7 @@ class InterimTests(TestCase):
     def do_interim_skip_announcement_test(self, base_session=False, extra_session=False, canceled_session=False):
         make_meeting_test_data()
         group = Group.objects.get(acronym='irg')
-        date = datetime.date.today() + datetime.timedelta(days=30)
+        date = date_today() + datetime.timedelta(days=30)
         meeting = make_interim_meeting(group=group, date=date, status='scheda')
         session = meeting.session_set.first()
         if base_session:
@@ -4036,12 +4128,10 @@ class InterimTests(TestCase):
         self.do_interim_skip_announcement_test(extra_session=True, canceled_session=True, base_session=True)
 
     def do_interim_send_announcement_test(self, base_session=False, extra_session=False, canceled_session=False):
-        make_interim_test_data()
+        make_interim_test_data(meeting_tz='America/Los_Angeles')
         session = Session.objects.with_current_status().filter(
             meeting__type='interim', group__acronym='mars', current_status='apprw').first()
         meeting = session.meeting
-        meeting.time_zone = 'America/Los_Angeles'
-        meeting.save()
 
         if base_session:
             base_session = SessionFactory(meeting=meeting, status_id='apprw', add_to_schedule=False)
@@ -4247,7 +4337,7 @@ class InterimTests(TestCase):
         self.do_interim_approve_by_secretariat_test(extra_session=True, canceled_session=True, base_session=True)
 
     def test_past(self):
-        today = datetime.date.today()
+        today = date_today()
         last_week = today - datetime.timedelta(days=7)
         ietf = SessionFactory(meeting__type_id='ietf',meeting__date=last_week,group__state_id='active',group__parent=GroupFactory(state_id='active'))
         SessionFactory(meeting__type_id='interim',meeting__date=last_week,status_id='canceled',group__state_id='active',group__parent=GroupFactory(state_id='active'))
@@ -4266,7 +4356,7 @@ class InterimTests(TestCase):
         if querystring is not None:
             url += '?' + querystring
 
-        today = datetime.date.today()
+        today = date_today()
         interims = dict(
             mars=add_event_info_to_session_qs(Session.objects.filter(meeting__type='interim', meeting__date__gt=today, group__acronym='mars')).filter(current_status='sched').first().meeting,
             ames=add_event_info_to_session_qs(Session.objects.filter(meeting__type='interim', meeting__date__gt=today, group__acronym='ames')).filter(current_status='canceled').first().meeting,
@@ -4386,9 +4476,9 @@ class InterimTests(TestCase):
     def do_interim_request_single_virtual(self, emails_expected):
         make_meeting_test_data()
         group = Group.objects.get(acronym='mars')
-        date = datetime.date.today() + datetime.timedelta(days=30)
-        time = datetime.datetime.now().time().replace(microsecond=0,second=0)
-        dt = datetime.datetime.combine(date, time)
+        date = date_today() + datetime.timedelta(days=30)
+        time = time_now().replace(microsecond=0,second=0)
+        dt = pytz.utc.localize(datetime.datetime.combine(date, time))
         duration = datetime.timedelta(hours=3)
         remote_instructions = 'Use webex'
         agenda = 'Intro. Slides. Discuss.'
@@ -4457,13 +4547,14 @@ class InterimTests(TestCase):
     def test_interim_request_single_in_person(self):
         make_meeting_test_data()
         group = Group.objects.get(acronym='mars')
-        date = datetime.date.today() + datetime.timedelta(days=30)
-        time = datetime.datetime.now().time().replace(microsecond=0,second=0)
-        dt = datetime.datetime.combine(date, time)
+        date = date_today() + datetime.timedelta(days=30)
+        time = time_now().replace(microsecond=0,second=0)
+        time_zone = 'America/Los_Angeles'
+        tz = pytz.timezone(time_zone)
+        dt = tz.localize(datetime.datetime.combine(date, time))
         duration = datetime.timedelta(hours=3)
         city = 'San Francisco'
         country = 'US'
-        time_zone = 'America/Los_Angeles'
         remote_instructions = 'Use webex'
         agenda = 'Intro. Slides. Discuss.'
         agenda_note = 'On second level'
@@ -4504,16 +4595,17 @@ class InterimTests(TestCase):
 
     def test_interim_request_multi_day(self):
         make_meeting_test_data()
-        date = datetime.date.today() + datetime.timedelta(days=30)
+        date = date_today() + datetime.timedelta(days=30)
         date2 = date + datetime.timedelta(days=1)
-        time = datetime.datetime.now().time().replace(microsecond=0,second=0)
-        dt = datetime.datetime.combine(date, time)
-        dt2 = datetime.datetime.combine(date2, time)
+        time = time_now().replace(microsecond=0,second=0)
+        time_zone = 'America/Los_Angeles'
+        tz = pytz.timezone(time_zone)
+        dt = tz.localize(datetime.datetime.combine(date, time))
+        dt2 = tz.localize(datetime.datetime.combine(date2, time))
         duration = datetime.timedelta(hours=3)
         group = Group.objects.get(acronym='mars')
         city = 'San Francisco'
         country = 'US'
-        time_zone = 'America/Los_Angeles'
         remote_instructions = 'Use webex'
         agenda = 'Intro. Slides. Discuss.'
         agenda_note = 'On second level'
@@ -4570,9 +4662,9 @@ class InterimTests(TestCase):
 
     def test_interim_request_multi_day_non_consecutive(self):
         make_meeting_test_data()
-        date = datetime.date.today() + datetime.timedelta(days=30)
+        date = date_today() + datetime.timedelta(days=30)
         date2 = date + datetime.timedelta(days=2)
-        time = datetime.datetime.now().time().replace(microsecond=0,second=0)
+        time = timezone.now().time().replace(microsecond=0,second=0)
         group = Group.objects.get(acronym='mars')
         city = 'San Francisco'
         country = 'US'
@@ -4607,7 +4699,7 @@ class InterimTests(TestCase):
     def test_interim_request_multi_day_cancel(self):
         """All sessions of a multi-day interim request should be canceled"""
         length_before = len(outbox)
-        date = datetime.date.today()+datetime.timedelta(days=15)
+        date = date_today() + datetime.timedelta(days=15)
 
         # Set up an interim request with several sessions 
         num_sessions = 3
@@ -4630,7 +4722,7 @@ class InterimTests(TestCase):
     def test_interim_request_series(self):
         make_meeting_test_data()
         meeting_count_before = Meeting.objects.filter(type='interim').count()
-        date = datetime.date.today() + datetime.timedelta(days=30)
+        date = date_today() + datetime.timedelta(days=30)
         if (date.month, date.day) == (12, 31):
             # Avoid date and date2 in separate years
             # (otherwise the test will fail if run on December 1st)
@@ -4640,14 +4732,15 @@ class InterimTests(TestCase):
         if date.year != date2.year:
             date += datetime.timedelta(days=1)
             date2 += datetime.timedelta(days=1)
-        time = datetime.datetime.now().time().replace(microsecond=0,second=0)
-        dt = datetime.datetime.combine(date, time)
-        dt2 = datetime.datetime.combine(date2, time)
+        time = time_now().replace(microsecond=0,second=0)
+        time_zone = 'America/Los_Angeles'
+        tz = pytz.timezone(time_zone)
+        dt = tz.localize(datetime.datetime.combine(date, time))
+        dt2 = tz.localize(datetime.datetime.combine(date2, time))
         duration = datetime.timedelta(hours=3)
         group = Group.objects.get(acronym='mars')
         city = ''
         country = ''
-        time_zone = 'America/Los_Angeles'
         remote_instructions = 'Use webex'
         agenda = 'Intro. Slides. Discuss.'
         agenda_note = 'On second level'
@@ -4789,14 +4882,14 @@ class InterimTests(TestCase):
         self.assertFalse(can_manage_group(user=user,group=group))
 
     def test_interim_request_details(self):
-        make_interim_test_data()
+        make_interim_test_data(meeting_tz='America/Chicago')
         meeting = Session.objects.with_current_status().filter(
             meeting__type='interim', group__acronym='mars', current_status='apprw').first().meeting
         url = urlreverse('ietf.meeting.views.interim_request_details',kwargs={'number':meeting.number})
         login_testing_unauthorized(self,"secretary",url)
         r = self.client.get(url)
         self.assertEqual(r.status_code, 200)
-        start_time = meeting.session_set.first().official_timeslotassignment().timeslot.time.strftime('%H:%M')
+        start_time = meeting.session_set.first().official_timeslotassignment().timeslot.local_start_time().strftime('%H:%M')
         utc_start_time = meeting.session_set.first().official_timeslotassignment().timeslot.utc_start_time().strftime('%H:%M')
         self.assertIn(start_time, unicontent(r))
         self.assertIn(utc_start_time, unicontent(r))
@@ -4804,7 +4897,7 @@ class InterimTests(TestCase):
     def test_interim_request_details_announcement(self):
         '''Test access to Announce / Skip Announce features'''
         make_meeting_test_data()
-        date = datetime.date.today() + datetime.timedelta(days=30)
+        date = date_today() + datetime.timedelta(days=30)
         group = Group.objects.get(acronym='mars')
         meeting = make_interim_meeting(group=group, date=date, status='scheda')
         url = urlreverse('ietf.meeting.views.interim_request_details',kwargs={'number':meeting.number})
@@ -5322,7 +5415,7 @@ class InterimTests(TestCase):
     def test_send_interim_minutes_reminder(self):
         make_meeting_test_data()
         group = Group.objects.get(acronym='mars')
-        date = datetime.datetime.today() - datetime.timedelta(days=10)
+        date = timezone.now() - datetime.timedelta(days=10)
         meeting = make_interim_meeting(group=group, date=date, status='sched')
         length_before = len(outbox)
         send_interim_minutes_reminder(meeting=meeting)
@@ -5337,7 +5430,11 @@ class InterimTests(TestCase):
         a1 = s1.official_timeslotassignment()
         t1 = a1.timeslot
         # Create an extra session
-        t2 = TimeSlotFactory.create(meeting=meeting, time=datetime.datetime.combine(meeting.date, datetime.time(11, 30)))
+        t2 = TimeSlotFactory.create(
+            meeting=meeting,
+            time=meeting.tz().localize(
+                datetime.datetime.combine(meeting.date, datetime.time(11, 30))
+            ))
         s2 = SessionFactory.create(meeting=meeting, group=s1.group, add_to_schedule=False)
         SchedTimeSessAssignment.objects.create(timeslot=t2, session=s2, schedule=meeting.schedule)
         #
@@ -5347,8 +5444,8 @@ class InterimTests(TestCase):
         self.assertContains(r, 'BEGIN:VEVENT')
         self.assertEqual(r.content.count(b'UID'), 2)
         self.assertContains(r, 'SUMMARY:mars - Martian Special Interest Group')
-        self.assertContains(r, t1.time.strftime('%Y%m%dT%H%M%S'))
-        self.assertContains(r, t2.time.strftime('%Y%m%dT%H%M%S'))
+        self.assertContains(r, t1.local_start_time().strftime('%Y%m%dT%H%M%S'))
+        self.assertContains(r, t2.local_start_time().strftime('%Y%m%dT%H%M%S'))
         self.assertContains(r, 'END:VEVENT')
         #
         url = urlreverse('ietf.meeting.views.agenda_ical', kwargs={'num':meeting.number, 'session_id':s1.id, })
@@ -5539,7 +5636,7 @@ class MaterialsTests(TestCase):
     def test_upload_bluesheets_interim_chair_access(self):
         make_meeting_test_data()
         mars = Group.objects.get(acronym='mars')
-        session=SessionFactory(meeting__type_id='interim',group=mars, meeting__date = datetime.date.today())
+        session=SessionFactory(meeting__type_id='interim',group=mars, meeting__date = date_today())
         url = urlreverse('ietf.meeting.views.upload_session_bluesheets',kwargs={'num':session.meeting.number,'session_id':session.id})
         self.client.login(username="marschairman", password="marschairman+password")
         r = self.client.get(url)
@@ -5782,7 +5879,7 @@ class MaterialsTests(TestCase):
         for type_id in ['ietf','interim']:
             session = SessionFactory(meeting__type_id=type_id)
             chair = RoleFactory(group=session.group,name_id='chair').person
-            session.meeting.importantdate_set.create(name_id='revsub',date=datetime.date.today()+datetime.timedelta(days=20))
+            session.meeting.importantdate_set.create(name_id='revsub',date=date_today() + datetime.timedelta(days=20))
             newperson = PersonFactory()
             
             session_overview_url = urlreverse('ietf.meeting.views.session_details',kwargs={'num':session.meeting.number,'acronym':session.group.acronym})
@@ -5830,7 +5927,7 @@ class MaterialsTests(TestCase):
 
     def test_disapprove_proposed_slides(self):
         submission = SlideSubmissionFactory()
-        submission.session.meeting.importantdate_set.create(name_id='revsub',date=datetime.date.today()+datetime.timedelta(days=20))
+        submission.session.meeting.importantdate_set.create(name_id='revsub',date=date_today() + datetime.timedelta(days=20))
         self.assertEqual(SlideSubmission.objects.filter(status__slug = 'pending').count(), 1)
         chair = RoleFactory(group=submission.session.group,name_id='chair').person
         url = urlreverse('ietf.meeting.views.approve_proposed_slides', kwargs={'slidesubmission_id':submission.pk,'num':submission.session.meeting.number})
@@ -5848,7 +5945,7 @@ class MaterialsTests(TestCase):
     def test_approve_proposed_slides(self):
         submission = SlideSubmissionFactory()
         session = submission.session
-        session.meeting.importantdate_set.create(name_id='revsub',date=datetime.date.today()+datetime.timedelta(days=20))
+        session.meeting.importantdate_set.create(name_id='revsub',date=date_today() + datetime.timedelta(days=20))
         chair = RoleFactory(group=submission.session.group,name_id='chair').person
         url = urlreverse('ietf.meeting.views.approve_proposed_slides', kwargs={'slidesubmission_id':submission.pk,'num':submission.session.meeting.number})
         login_testing_unauthorized(self, chair.user.username, url)
@@ -5873,7 +5970,7 @@ class MaterialsTests(TestCase):
         submission = SlideSubmissionFactory(session__meeting__type_id='ietf')
         session1 = submission.session
         session2 = SessionFactory(group=submission.session.group, meeting=submission.session.meeting)
-        submission.session.meeting.importantdate_set.create(name_id='revsub',date=datetime.date.today()+datetime.timedelta(days=20))
+        submission.session.meeting.importantdate_set.create(name_id='revsub',date=date_today() + datetime.timedelta(days=20))
         chair = RoleFactory(group=submission.session.group,name_id='chair').person
         url = urlreverse('ietf.meeting.views.approve_proposed_slides', kwargs={'slidesubmission_id':submission.pk,'num':submission.session.meeting.number})
         login_testing_unauthorized(self, chair.user.username, url)
@@ -5890,7 +5987,7 @@ class MaterialsTests(TestCase):
         submission = SlideSubmissionFactory(session__meeting__type_id='ietf')
         session1 = submission.session
         session2 = SessionFactory(group=submission.session.group, meeting=submission.session.meeting)
-        submission.session.meeting.importantdate_set.create(name_id='revsub',date=datetime.date.today()+datetime.timedelta(days=20))
+        submission.session.meeting.importantdate_set.create(name_id='revsub',date=date_today() + datetime.timedelta(days=20))
         chair = RoleFactory(group=submission.session.group,name_id='chair').person
         url = urlreverse('ietf.meeting.views.approve_proposed_slides', kwargs={'slidesubmission_id':submission.pk,'num':submission.session.meeting.number})
         login_testing_unauthorized(self, chair.user.username, url)
@@ -5904,7 +6001,7 @@ class MaterialsTests(TestCase):
     def test_submit_and_approve_multiple_versions(self):
         session = SessionFactory(meeting__type_id='ietf')
         chair = RoleFactory(group=session.group,name_id='chair').person
-        session.meeting.importantdate_set.create(name_id='revsub',date=datetime.date.today()+datetime.timedelta(days=20))
+        session.meeting.importantdate_set.create(name_id='revsub',date=date_today()+datetime.timedelta(days=20))
         newperson = PersonFactory()
         
         propose_url = urlreverse('ietf.meeting.views.propose_session_slides', kwargs={'session_id':session.pk, 'num': session.meeting.number})          
@@ -6285,8 +6382,8 @@ class HasMeetingsTests(TestCase):
         self.assertEqual(r.status_code, 200)
         q = PyQuery(r.content)
         self.assertTrue(q('#id_group option[value="%d"]'%group.pk))
-        date = datetime.date.today() + datetime.timedelta(days=30+meeting_count)
-        time = datetime.datetime.now().time().replace(microsecond=0,second=0)
+        date = date_today() + datetime.timedelta(days=30+meeting_count)
+        time = time_now().replace(microsecond=0,second=0)
         remote_instructions = 'Use webex'
         agenda = 'Intro. Slides. Discuss.'
         agenda_note = 'On second level'
@@ -6382,7 +6479,7 @@ class HasMeetingsTests(TestCase):
             session = SessionFactory(
                 group__type_id = gf.type_id,
                 meeting__type_id='interim', 
-                meeting__date = datetime.datetime.today()+datetime.timedelta(days=30),
+                meeting__date = timezone.now()+datetime.timedelta(days=30),
                 status_id='sched',
             )
             sessions.append(session)
@@ -6398,7 +6495,7 @@ class HasMeetingsTests(TestCase):
         sessions=[]
         for gf in GroupFeatures.objects.filter(has_meetings=True):
             group = GroupFactory(type_id=gf.type_id)
-            meeting_date = datetime.datetime.today() + datetime.timedelta(days=30)
+            meeting_date = timezone.now() + datetime.timedelta(days=30)
             session = SessionFactory(
                 group=group,
                 meeting__type_id='interim', 
@@ -6419,7 +6516,7 @@ class HasMeetingsTests(TestCase):
         sessions=[]
         for gf in GroupFeatures.objects.filter(has_meetings=True):
             group = GroupFactory(type_id=gf.type_id)
-            meeting_date = datetime.datetime.today() + datetime.timedelta(days=30)
+            meeting_date = timezone.now() + datetime.timedelta(days=30)
             session = SessionFactory(
                 group=group,
                 meeting__type_id='interim', 
@@ -7145,7 +7242,7 @@ class ProceedingsTests(BaseMeetingTestCase):
 
     def test_proceedings_no_agenda(self):
         # Meeting number must be larger than the last special-cased proceedings (currently 96)
-        meeting = MeetingFactory(type_id='ietf',populate_schedule=False,date=datetime.date.today(), number='100')
+        meeting = MeetingFactory(type_id='ietf',populate_schedule=False,date=date_today(), number='100')
         url = urlreverse('ietf.meeting.views.proceedings')
         r = self.client.get(url)
         self.assertRedirects(r, urlreverse('ietf.meeting.views.materials'))
@@ -7254,7 +7351,7 @@ class ProceedingsTests(BaseMeetingTestCase):
         """Generate a meeting for proceedings material test"""
         # meeting number 123 avoids various legacy cases that affect these tests
         # (as of Aug 2021, anything above 96 is probably ok)
-        return MeetingFactory(type_id='ietf', number='123', date=datetime.date.today())
+        return MeetingFactory(type_id='ietf', number='123', date=date_today())
 
     def _secretary_only_permission_test(self, url, include_post=True):
         self.client.logout()

ietf/meeting/utils.py

@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 import datetime
 import itertools
+import pytz
 import requests
 import subprocess
 
@@ -12,6 +13,7 @@ from urllib.error import HTTPError
 from django.conf import settings
 from django.contrib import messages
 from django.template.loader import render_to_string
+from django.utils import timezone
 from django.utils.encoding import smart_text
 
 import debug                            # pyflakes:ignore
@@ -26,6 +28,7 @@ from ietf.person.models import Person
 from ietf.secr.proceedings.proc_utils import import_audio_files
 from ietf.utils.html import sanitize_document
 from ietf.utils.log import log
+from ietf.utils.timezone import date_today
 
 
 def session_time_for_sorting(session, use_meeting_date):
@@ -33,13 +36,17 @@ def session_time_for_sorting(session, use_meeting_date):
     if official_timeslot:
         return official_timeslot.time
     elif use_meeting_date and session.meeting.date:
-        return datetime.datetime.combine(session.meeting.date, datetime.time.min)
+        return session.meeting.tz().localize(
+            datetime.datetime.combine(session.meeting.date, datetime.time.min)
+        )
     else:
         first_event = SchedulingEvent.objects.filter(session=session).order_by('time', 'id').first()
         if first_event:
             return first_event.time
         else:
-            return datetime.datetime.min
+            # n.b. cannot interpret this in timezones west of UTC. That is not expected to be necessary,
+            # but could probably safely add a day to the minimum datetime to make that possible.
+            return pytz.utc.localize(datetime.datetime.min)
 
 def session_requested_by(session):
     first_event = SchedulingEvent.objects.filter(session=session).order_by('time', 'id').first()
@@ -64,12 +71,12 @@ def group_sessions(sessions):
 
     sessions = sorted(sessions,key=lambda s:s.time)
 
-    today = datetime.date.today()
     future = []
     in_progress = []
     recent = []
     past = []
     for s in sessions:
+        today = date_today(s.meeting.tz())
         if s.meeting.date > today:
             future.append(s)
         elif s.meeting.end_date() >= today:
@@ -101,7 +108,7 @@ def get_upcoming_manageable_sessions(user):
     # .filter(date__gte=today - F('days')), but unfortunately, it
     # doesn't work correctly with Django 1.11 and MySQL/SQLite
 
-    today = datetime.date.today()
+    today = date_today()
 
     candidate_sessions = add_event_info_to_session_qs(
         Session.objects.filter(meeting__date__gte=today - datetime.timedelta(days=15))
@@ -158,7 +165,12 @@ def create_proceedings_templates(meeting):
 
 def finalize(meeting):
     end_date = meeting.end_date()
-    end_time = datetime.datetime.combine(end_date, datetime.datetime.min.time())+datetime.timedelta(days=1)
+    end_time = meeting.tz().localize(
+        datetime.datetime.combine(
+            end_date,
+            datetime.time.min,
+        )
+    ).astimezone(pytz.utc) + datetime.timedelta(days=1)
     for session in meeting.session_set.all():
         for sp in session.sessionpresentation_set.filter(document__type='draft',rev=None):
             rev_before_end = [e for e in sp.document.docevent_set.filter(newrevisiondocevent__isnull=False).order_by('-time') if e.time <= end_time ]
@@ -322,7 +334,9 @@ def preprocess_constraints_for_meeting_schedule_editor(meeting, sessions):
     # synthesize AD constraints - we can treat them as a special kind of 'bethere'
     responsible_ad_for_group = {}
     session_groups = set(s.group for s in sessions if s.group and s.group.parent and s.group.parent.type_id == 'area')
-    meeting_time = datetime.datetime.combine(meeting.date, datetime.time(0, 0, 0))
+    meeting_time = meeting.tz().localize(
+        datetime.datetime.combine(meeting.date, datetime.time(0, 0, 0))
+    )
 
     # dig up historic AD names
     for group_id, history_time, pk in Person.objects.filter(rolehistory__name='ad', rolehistory__group__group__in=session_groups, rolehistory__group__time__lte=meeting_time).values_list('rolehistory__group__group', 'rolehistory__group__time', 'pk').order_by('rolehistory__group__time'):
@@ -511,7 +525,7 @@ def swap_meeting_schedule_timeslot_assignments(schedule, source_timeslots, targe
             if max_overlap > datetime.timedelta(minutes=5):
                 for a in lts_assignments:
                     a.timeslot = most_overlapping_rts
-                    a.modified = datetime.datetime.now()
+                    a.modified = timezone.now()
                     a.save()
                 swapped = True
 

ietf/message/management/commands/show_messages.py

@@ -6,6 +6,7 @@ import email
 import datetime
 
 from django.core.management.base import BaseCommand
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -25,7 +26,7 @@ class Command(BaseCommand):
     """
 
     def add_arguments(self, parser):
-        default_start = datetime.datetime.now() - datetime.timedelta(days=14)
+        default_start = timezone.now() - datetime.timedelta(days=14)
         parser.add_argument(
             '-t', '--start', '--from', type=str, default=default_start.strftime('%Y-%m-%d %H:%M'),
             help='Limit the list to messages saved after the given time (default %(default)s).',

ietf/message/migrations/0012_use_timezone_now_for_message_models.py

@@ -0,0 +1,24 @@
+# Generated by Django 2.2.28 on 2022-07-12 11:24
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('message', '0011_auto_20201109_0439'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='message',
+            name='time',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AlterField(
+            model_name='sendqueue',
+            name='time',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+    ]

ietf/message/models.py

@@ -2,10 +2,10 @@
 # -*- coding: utf-8 -*-
 
 
-import datetime
 import email.utils
 
 from django.db import models
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -17,7 +17,7 @@ from ietf.utils.models import ForeignKey
 from ietf.utils.mail import get_email_addresses_from_text
 
 class Message(models.Model):
-    time = models.DateTimeField(default=datetime.datetime.now)
+    time = models.DateTimeField(default=timezone.now)
     by = ForeignKey(Person)
 
     subject = models.CharField(max_length=255)
@@ -62,7 +62,7 @@ class MessageAttachment(models.Model):
 
 
 class SendQueue(models.Model):
-    time = models.DateTimeField(default=datetime.datetime.now)
+    time = models.DateTimeField(default=timezone.now)
     by = ForeignKey(Person)
     
     message = ForeignKey(Message)

ietf/message/tests.py

@@ -5,6 +5,7 @@
 import datetime
 
 from django.urls import reverse as urlreverse
+from django.utils import timezone
 
 import debug                            # pyflakes:ignore
 
@@ -14,10 +15,13 @@ from ietf.message.utils import send_scheduled_message_from_send_queue
 from ietf.person.models import Person
 from ietf.utils.mail import outbox, send_mail_text, send_mail_message, get_payload_text
 from ietf.utils.test_utils import TestCase
+from ietf.utils.timezone import date_today
+
+
 
 class MessageTests(TestCase):
     def test_message_view(self):
-        nomcom = GroupFactory(name="nomcom%s" % datetime.date.today().year, type_id="nomcom")
+        nomcom = GroupFactory(name="nomcom%s" % date_today().year, type_id="nomcom")
         msg = Message.objects.create(
             by=Person.objects.get(name="(System)"),
             subject="This is a test",
@@ -87,7 +91,7 @@ class SendScheduledAnnouncementsTests(TestCase):
         q = SendQueue.objects.create(
             by=Person.objects.get(name="(System)"),
             message=msg,
-            send_at=datetime.datetime.now() + datetime.timedelta(hours=12)
+            send_at=timezone.now() + datetime.timedelta(hours=12)
             )
 
         mailbox_before = len(outbox)
@@ -113,7 +117,7 @@ class SendScheduledAnnouncementsTests(TestCase):
         q = SendQueue.objects.create(
             by=Person.objects.get(name="(System)"),
             message=msg,
-            send_at=datetime.datetime.now() + datetime.timedelta(hours=12)
+            send_at=timezone.now() + datetime.timedelta(hours=12)
             )
         
         mailbox_before = len(outbox)

ietf/message/utils.py

@@ -2,8 +2,9 @@
 # -*- coding: utf-8 -*-
 
 
-import re, datetime, email
+import re, email
 
+from django.utils import timezone
 from django.utils.encoding import force_str
 
 from ietf.utils.mail import send_mail_text, send_mail_mime
@@ -52,7 +53,7 @@ def send_scheduled_message_from_send_queue(queue_item):
         send_mail_mime(None, message.to, message.frm, message.subject,
                        msg, cc=message.cc, bcc=message.bcc)
 
-    queue_item.sent_at = datetime.datetime.now()
+    queue_item.sent_at = timezone.now()
     queue_item.save()
 
     queue_item.message.sent = queue_item.sent_at