Did you know that March 14th (3/14) is National Pi Day, as officially designated by the US congress this year?
Traditional festivities are to study the mathematical constant pi in school (which took place yesterday since 3/14 fell on Saturday this year), bake and eat a pie, and sing Pi Day Carols. Evil Mad Scientist Laboraties constructed a Pi Pie Trivet for the occasion, and posted instructions for making your own.
Study the mathematical constant pi in school
Eat a pie
Sing Pi Day Carols.