This entry was published at least two years ago (originally posted on March 7, 2006). Since that time the information may have become outdated or my beliefs may have changed (in general, assume a more open and liberal current viewpoint). A fuller disclaimer is available.
Inspired by the Wikipedia’s list of Geek Holidays, I’ve assembled them all into an iCal file ready for download and import: Geek Holidays.ics (28k .ics). Never miss another Pi Day, Yellow Pig’s Day, or Day of the Ninja again!
Update: This file has now been revised, expanded, and supplanted by this newer version.