Happy Pi Day everyone! Today, March 14th is the official day to celebrate the number pi and all things related to it, including pies from rhubarb to pizza. According to Wikipedia it started in 1988 by a bunch of museum staff with too much time on their hands.
The really scary part is that there is also a Pi Approximation Day that is celebrated on July 7th, since pi is also calculated as 22/7ths.
In any case, a good excuse to go eat some pie today!