You don't have to be a math geek to love Pi Day (March 14)--but it helps! Like many others throughout the world, the Imagine Learning family celebrates Pi Day with pie, from blueberry to lemon chiffon--the more flavors, the better. But eating a slice of pie is only one time-honored tradition on Pi Day. Fun 'Pi Day' Facts How much do you really know about Pi Day? Test your knowledge with a few fun facts: