diff --git a/src/agenda_culturel/models.py b/src/agenda_culturel/models.py
index 18e0523..b461a25 100644
--- a/src/agenda_culturel/models.py
+++ b/src/agenda_culturel/models.py
@@ -1120,7 +1120,11 @@ class Event(models.Model):
             )
             self._proposed_events = sorted(
                 self._proposed_events,
-                key=lambda e: (e.start_day, e.start_time, e.title),
+                key=lambda e: (
+                    e.start_day,
+                    e.start_time if e.start_time else datetime.min.time(),
+                    e.title,
+                ),
             )
 
         return self._proposed_events