It’s pi day, or pie day – time to grab a slice of pie and think about pi. Pi is the ratio between a circle’s diameter and circumference, and of course we all know what pie is.
March 13 was designated Pi day by Larry Shaw in 1988. Shaw, a physicist at the San Francisco Exploratorium, felt that the mathematic constant pi deserved celebration and marched with the staff and public in a circle – wrapping the day up by eating circular fruit pies.
The day caught on and is celebrated by mathematicians and pie lovers alike. On March 12, 2009, the U.S. House of Representatives passed a non-binding resolution, recognizing March 14, 2009 as National Pi Day.
Interested in celebrating by baking your own pie?
We’ve got some delicious pie recipes on our blog: