March 14th is the U.S. House of Representatives-approved Pi Day! Pi (π) is the mathematical constant that is the ratio of a circle’s circumference to its diameter, and is approximately equal to 3.14–hence the date March 14th (3.14)!

You can celebrate Pi Day by checking out one of our many books on the subject. Rather read something a little less technical? Try “Sir Cumference and the Dragon of Pi: A Math Adventure” by Cindy Neuschwander:

*When Sir Cumference drinks a potion which turns him into a dragon, his son Radius searches for the magic number known as pi which will restore him to his former shape.*

Pi is not to be confused with the protagonist of Life of Pi.

Pi Day is also not to be confused with Pie Day, which is January 23rd. You know what? Go ahead and confuse them, because…pie.

Mmm…pie.