I learned today that Tuesday comes from the Old English version of Tiw's Day, where Tiw is a Saxon war god. (Maybe THE Saxon war god? I dunno). Apparently, he is better known as the Norse god Tyr.
Speaking of Tyr, have you seen this?: http://boardgamegeek.com/image/953922/yggdrasil
Sorry, I've been reading a bit about the historical background of the Druids.
Oh, that reminds me, don't forget, the festival of Samhain is November 1st
I have thought for a while of adding obscure holidays and celebrations to my calender. Well, obscure for my neck of the woods, anyway.
Bastille Day on July 14, 1789 (also commemorating F. Scott Fitzgerald)
The Boston Tea Party on December 16, 1773 (grab a Sam Adams)
First Contact Day on April 5, 2063 (the Vulcans land and meet humans)
Talk Like a Pirate Day on Sept 19
Do you nominate a poorly appreciated date?