Happy Pi Day!

Pi Day and Pi Approximation Day are two holidays held to celebrate the mathematical constant π (pi) (in the mm/dd date notation: 3/14); since 3, 1 and 4 are the first three digits of π. March 14 is also the birthday of Albert Einstein and the two events are sometimes celebrated together. [...]
The U.S. House of Representatives passed a non-binding resolution (HRES 224), recognizing March 14, 2009 as National Pi Day.

- from here.

Eager for more?
Well, here's a website to help you memorise the digits of pi: Practice makes perfect, doesn't it? (: