diff --git a/councilmatic_core/models.py b/councilmatic_core/models.py
index 90ac2d1..e0885c4 100644
--- a/councilmatic_core/models.py
+++ b/councilmatic_core/models.py
@@ -1,5 +1,6 @@
 import datetime
 import os
+import pytz
 
 from django.db import models
 from django.contrib.gis.db import models as geo_models
@@ -98,7 +99,7 @@ def sponsorship_sort(sponsorship):
             '''
             Sponsorships of bills without recent action dates should appear last.
             '''
-            return sponsorship.bill.last_action_date or datetime.date(datetime.MINYEAR, 1, 1)
+            return sponsorship.bill.last_action_date or pytz.utc.localize(datetime.date(datetime.MINYEAR, 1, 1))
 
         return sorted((s for s in primary_sponsorships), key=sponsorship_sort, reverse=True)