diff --git a/hknweb/events/forms/event/create.py b/hknweb/events/forms/event/create.py
index 7688ee35..5acba7d8 100644
--- a/hknweb/events/forms/event/create.py
+++ b/hknweb/events/forms/event/create.py
@@ -48,5 +48,11 @@ def clean(self):
         cleaned_data = super().clean()
         start_time = cleaned_data.get("start_time")
         end_time = cleaned_data.get("end_time")
-        if end_time < start_time:
+        if (start_time is None) or (end_time is None):
+            error_source = "start_time" if (start_time is None) else "end_time"
+            self.add_error(
+                error_source,
+                "Please use the time picker to select the time, the formatter is picky",
+            )
+        elif end_time < start_time:
             self.add_error("end_time", "End Time is not after Start Time")