|A Pi pie created by Meg. See her profile on Flickr|
Pi Day is a holiday commemorating the mathematical constant π (pi). Pi Day is celebrated on March 14 (or 3/14 in month/day date format), since 3, 1 and 4 are the three most significant digits of π in the decimal form. In 2009, the United States House of Representatives supported the designation of Pi Day. ~Wikipedia
Easy Fun School has some great Pi Day Activities you might want to check out. If you have any more ideas for celebrating Pi Day, please leave a comment describing your plans.