Pi Day recognizes the mathematical constant Pi (Greek letter “ π ”) which represents the ratio of the circumference of a circle to its diameter. Pi is roughly equal to 3.1415… with an infinite number of decimals and is consequently celebrated on March 14 or 3/14.

Pi Quiz

What do you get when a bunch of sheep stand around in a circle? Shepherd's pi.

What do you get when you take the sun and divide its circumference by its diameter? Pi in the sky.

What do you get when you divide a jack-o-lantern by its diameter? Pumpkin pi.