Coming as I do from a family of geeks, I'm surprised I never heard of this until I heard of it from a friend. But apparently today is International Star Wars Day because -- are you ready? -- it's May 4th. As in, "May the fourth be with you."
So Happy Star Wars Day! May the Fourth be with you!
UPDATE: Oops. Today is May the Third. That's what happens when you work at home -- you totally lose track of the calendar.