diff --git a/ietf/meeting/forms.py b/ietf/meeting/forms.py
index 3618ce59a..d20275259 100644
--- a/ietf/meeting/forms.py
+++ b/ietf/meeting/forms.py
@@ -1,5 +1,6 @@
 import os
 import codecs
+import datetime
 
 from django import forms
 from django.db.models import Q
@@ -33,6 +34,32 @@ class GroupModelChoiceField(forms.ModelChoiceField):
     def label_from_instance(self, obj):
         return obj.acronym
 
+class CustomDurationField(DurationField):
+    '''Custom DurationField to display as HH:MM (no seconds)'''
+    def prepare_value(self, value):
+        if isinstance(value, datetime.timedelta):
+            return duration_string(value)
+        return value
+
+def duration_string(duration):
+    '''Custom duration_string to return HH:MM (no seconds)'''
+    days = duration.days
+    seconds = duration.seconds
+    microseconds = duration.microseconds
+
+    minutes = seconds // 60
+    seconds = seconds % 60
+
+    hours = minutes // 60
+    minutes = minutes % 60
+
+    string = '{:02d}:{:02d}'.format(hours, minutes)
+    if days:
+        string = '{} '.format(days) + string
+    if microseconds:
+        string += '.{:06d}'.format(microseconds)
+
+    return string
 # -------------------------------------------------
 # Forms
 # -------------------------------------------------
@@ -160,7 +187,7 @@ class InterimMeetingModelForm(forms.ModelForm):
 class InterimSessionModelForm(forms.ModelForm):
     date = DatepickerDateField(date_format="yyyy-mm-dd", picker_settings={"autoclose": "1"}, label='Date', required=False)
     time = forms.TimeField(widget=forms.TimeInput(format='%H:%M'), required=True)
-    requested_duration = DurationField(required=True)
+    requested_duration = CustomDurationField(required=True)
     end_time = forms.TimeField(required=False)
     remote_instructions = forms.CharField(max_length=1024, required=True)
     agenda = forms.CharField(required=False, widget=forms.Textarea, strip=False)