Ticket #12467: 12467.diff

django/db/models/fields/__init__.py

@@ -517 +517 @@
 
         if not ansi_date_re.search(value):
             raise exceptions.ValidationError(
-                _('Enter a valid date in YYYY-MM-DD format.'))
+                _('Enter a valid date in YYYY-MM-DD format. Invalid value: %s') % value)
         # Now that we have the date string in YYYY-MM-DD format, check to make
         # sure it's a valid date.
         # We could use time.strptime here and catch errors, but datetime.date