strftime function you find in the major scripting languages like Perl, PHP, and Ruby -- it's a truly indispensible tool for anyone who has to twist and manipulate dates into different formats for display.
Not wanting to reinvent the wheel of course, I looked around and found what looks like a nice implementation by Jonathan Buhacoff. Unfortunately, it's GPL-licensed, and all the Scooby code is released under the more permissive Apache License v. 2, so we can't use it.
strftime for us to use with the Scooby project, and like all other Scooby code, it's Apache-licensed. You can download the latest stable version of the date.js file from OSAF's SVN server. I've also created some basic documentation on the OSAF Wiki.
I hope this thing can be useful for other folks besides just us. Please send me patches for fixes and improvements.