Happy Pi Day

Happy Pi Day! The annual celebration, held every March 14, is your chance to pay tribute to the most famous constant in math and physics. Pi Day is celebrated in countries that follow the month/day (m/dd) date format, because the digits in the date, March 14 or 3/14, are the first three digits of π (3.14).

Forgot what Pi means?
Pi is the number you get when you divide the circumference of a circle by its diameter. It is represented by the Greek letter “π” — in English, “pi.”