the ticket: ​http://code.djangoproject.com/ticket/2443

by the autor: ​http://gulopine.gamemusic.org/2007/nov/03/storing-passages-of-time/

Relevant links:

• ​http://groups.google.com/group/django-developers/browse_thread/thread/d32316ce7964dbaf?hl=en