So it’s here again: Pi Day! Pi is the symbol used for the ratio of the circumference of a circle to its diameter. The Greek letter Pi is celebrated by math enthusiasts– who appreciate the mathematical constant’s beauty– around the world every March 14th because of its rough equivalence to 3.14. Pi is the symbol used for the ratio of the circumference of a circle to its diameter.

To get even geekier about it Pi minute occurs at 1:59 PM because when Pi is truncated to several decimal points you get 3.14159.26. This of course making 3/14 at 1:59 and .26 seconds Pi Second.

The first Pi celebration was held in 1988 at the San Francisco Exploriatorium speared headed by physicist Larry Shaw and involved marching around a circular space and eating pies. MIT often mails out its acceptance letters on this date in celebration.

So go ahead get some pies, order up a pizza, make round a part of your menu today.

Here are a few Pi images to get you in the spirit: