Pi

May not be noticeable in most calendars, but if you're math nerd (or a nerd in general - which we consider ourselves, obviously), and you know what the March 14. It is 3 / 14, known as the first three digits of the BP. It has become a holiday since a slight geek of some kind, and prompted some celebrations unique to a certain extent over the years. One of the newest music comes from John Michael