Do we really have to tell you how to celebrate Pi Day?  Why is today Pi Day?  Well, it’s 3/14, right?You could start by learning more about the near-mystical number–3.14 in its most severely abbreviated form, hence the March 14 (3/14) honors–at the official Pi Day site. There you can find out about the history of pi, how to use the number in a classroom to good effect, and how other people are celebrating the occasion.Baker’s Square here we come, for our pi(e) to celebrate the day!