diff --git a/AKModel/availability/forms.py b/AKModel/availability/forms.py
index 27d3887a3f96d6a7de5c85fb1e76e05f45e23cef..c6abc863cc06bf327bb44c19635c7dcd91e4c39b 100644
--- a/AKModel/availability/forms.py
+++ b/AKModel/availability/forms.py
@@ -80,7 +80,7 @@ class AvailabilitiesFormMixin(forms.Form):
         if not obj:
             raise TypeError
         if obj.tzinfo is None:
-            obj = obj.astimezone(tz)
+            obj = obj.replace(tzinfo=tz)
 
         return obj