Don't get me wrong, I love Christmas too, but I really like the Advent Calendars that wind up the year. 

24 ways
Drew McLellan and his crew have been putting together web development tricks to round out the year for the last few years.

Perl Advent Calendar
None too late and looking like it was designed by a Perl programmer.

Two advent calendars I'd love to see:
1. Microsoft .NET
2. [Iron] Python