Ticket #14752: dates.diff

django/views/generic/dates.py

@@ -348 +348 @@
         week = self.get_week()
 
         date_field = self.get_date_field()
+        allowable_week_formats = {'%U':'0', '%W':'1' } # week start on Sunday, Monday
+        day_of_week = allowable_week_formats[self.get_week_format()]
         date = _date_from_string(year, self.get_year_format(),
-                                 '0', '%w',
+                                 day_of_week, '%w',
                                  week, self.get_week_format())
 
         # Construct a date-range lookup.