Okay, so, it doesn't give you an excuse to dress up like a pirate or go door to door begging for mind-altering substances (or "candy" as many choose to call it), but it's still good to remember and mark the day, at least if you're some stripe of Protestant: Today is the 490th anniversary of the day Martin Luther posted his 95 theses on the door of the local church and, unbeknownst to him, altered the course of the Christian church. Celebrate by reading your Bible in your own language (he was the first to translate it to a language the common man could read, assuming, of course, the common man was German) and watching Luthur, the really great movie about Luther's experiences that led him to post the theses (featuring hottie Joseph Feinnes as Luther, who isn't quite as hot as a monk, I'll admit, but an excellent actor for the role).
Weird how I grew up in the church and NEVER ONCE heard this guy's name. Had no clue who Martin Luther King Jr. was named after. Had no idea there had been a time when the Catholic Church was the only game in town. Sad.
Dan's got a link to a great site with lots of cool reformation stuff; check it out!