Ticket #5794: widgetpatch.diff

newforms/widgets.py

@@ -161 +161 @@
             self.format = format
 
     def render(self, name, value, attrs=None):
+        if value is not None:
+            value = value.strftime(self.format)
         return super(DateTimeInput, self).render(name,
-                value.strftime(self.format), attrs)
+                value, attrs)
 
 class CheckboxInput(Widget):
     def __init__(self, attrs=None, check_test=bool):