These are the 7 blog posts written on December 13 of any year. (Nearby: December 12 and December 14.)
2014:
Seeing what the computer sees #python
2013:
Coverage.py 3.7.1 #coverage #my-code
2008:
Genetic image evolution #algorithms #art
2005:
Bliss #programming-languages
2003:
SmoothTeddy #graphics
Snow sculptures #art
2002:
Froogle and Zeitgeist #google