Maybe this isn't a hint exactly, but I spent some time this morning putting together an iCal calendar for Canadian holidays. If you'd like to subscribe, go to this link. Please let me know if I've made any mistakes, at chad (dot) hogan (at) mac (dot) com.
Predictable holidays are scheduled forever, and the oddballs are included through 2004. I included both national and provincial holidays.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020912065601518