Each DateTimeField gets free JavaScript shortcuts. Dates get a "Today"
shortcut and calendar popup, and times get a "Now" shortcut and a
convenient popup that lists commonly entered times.
It's usually pretty easy to think through and figure out where to find
something, without having to wait for a mailing list reply...
The way to arrive at the answer is to start by looking at where the
admin app's code lives: the folder 'django/contrib/admin' in your
downloaded package:
http://code.djangoproject.com/browser/django/trunk/django/contrib/admin
This contains a subdirectory called 'media', which in turn contains a
subdirectory called 'js' (short for 'javascript'). Looking in there
reveals a file 'calender.js' which provides some of the logic for
creating the calendar. And there's also a subdirectory called 'admin'
which contains... DateTimeShortcuts.js:
--
"May the forces of evil become confused on the way to your house."
-- George Carlin
It's a JavaScript file... read through it to see what sort of HTML it
expects to work with, and tailor a page to suit.