diff --git a/eodb/events/management/commands/common.py b/eodb/events/management/commands/common.py
index 287bf2d..bc286dc 100644
--- a/eodb/events/management/commands/common.py
+++ b/eodb/events/management/commands/common.py
@@ -46,7 +46,10 @@ class GraphCommand(BaseCommand):
         datetime_var = 'author_datetime'
         if options.get('committime'):
             datetime_var = 'commit_datetime'
-        return make_aware(make_naive(getattr(event, datetime_var)))
+        try:
+            return make_aware(make_naive(getattr(event, datetime_var)))
+        except:  # maybe pytz.exceptions.AmbiguousTimeError
+            return getattr(event, datetime_var)
 
     def get_events(self, options):
         if options.get('entrouvert'):