diff --git a/ietf/meeting/helpers.py b/ietf/meeting/helpers.py
index dea02605b..3ba280514 100644
--- a/ietf/meeting/helpers.py
+++ b/ietf/meeting/helpers.py
@@ -618,3 +618,14 @@ def populate_important_dates(meeting):
     assert meeting.type_id=='ietf'
     for datename in ImportantDateName.objects.filter(used=True):
         ImportantDate.objects.create(meeting=meeting,name=datename,date=meeting.date+datetime.timedelta(days=datename.default_offset_days))
+
+def update_important_dates(meeting):
+    assert meeting.type_id=='ietf'
+    for datename in ImportantDateName.objects.filter(used=True):
+        date = meeting.date+datetime.timedelta(days=datename.default_offset_days)
+        d = ImportantDate.objects.filter(meeting=meeting, name=datename).first()
+        if d:
+            d.date = date
+            d.save()
+        else:
+            ImportantDate.objects.create(meeting=meeting, name=datename, date=date)
diff --git a/ietf/meeting/management/commands/update_important_dates.py b/ietf/meeting/management/commands/update_important_dates.py
new file mode 100644
index 000000000..841c5ba06
--- /dev/null
+++ b/ietf/meeting/management/commands/update_important_dates.py
@@ -0,0 +1,45 @@
+# Copyright The IETF Trust 2018, All Rights Reserved
+from __future__ import unicode_literals
+
+import sys
+import datetime
+
+from django.core.management.base import BaseCommand, CommandError
+from django.core import serializers
+
+import debug                            # pyflakes:ignore
+
+from ietf.name.models import ImportantDateName
+from ietf.meeting.helpers import get_meeting, update_important_dates
+from ietf.meeting.models import Meeting, ImportantDate
+
+class Command(BaseCommand):
+
+    help = 'Updates the important dates for the given meeting'
+
+    def add_arguments(self, parser):
+        parser.add_argument('meeting', nargs='+', type=int)
+
+    def handle(self, *args, **options):
+        datenames = ImportantDateName.objects.all()
+        slugs = list(datenames.values_list('slug', flat=True))
+        max_offset = - min(list(datenames.values_list('default_offset_days', flat=True)))
+        #
+        for m in options['meeting']:
+            meeting = Meeting.objects.filter(number=m).first()
+            if not meeting:
+                self.stderr.write("\nMeeting not found: %s\n" % (m, ))
+                continue
+            if meeting.date < datetime.date.today() + 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, ))
+            pre_dates = dict( (d.name_id, d) for d in ImportantDate.objects.filter(meeting=meeting) )
+            update_important_dates(meeting)
+            post_dates = dict( (d.name_id, d) for d in ImportantDate.objects.filter(meeting=meeting) )
+            for slug in slugs:
+                if slug in pre_dates:
+                    if pre_dates[slug].date == post_dates[slug].date:
+                        self.stdout.write('%-16s  %s    unchanged\n' % (slug, pre_dates[slug].date ))
+                    else:
+                        self.stdout.write('%-16s  %s > %s\n' % (slug, pre_dates[slug].date, post_dates[slug].date))