Pi Day

March 14, Thursday

Pi Day
© ShutterStock
Pi Day is an annual celebration of the mathematical constant π (pi). Pi Day is observed on March 14 (3/14 in the month/day format) since 3, 1, and 4 are the first three significant figures of π. It was founded in 1988 by Larry Shaw, an employee of the San Francisco, California science museum, the Exploratorium. Celebrations often involve eating pie or holding pi recitation competitions. In 2009, the United States House of Representatives supported the designation of Pi Day. UNESCO's 40th General Conference designated Pi Day as the International Day of Mathematics in November 2019. Alternative dates for the holiday include July 22 (22/7, an approximation of π) and June 28 (6.28, an approximation of 2π or tau).

Pi Day

Pi Day – days left: 129. Create Countdown to Event

Pi Day in other years

Pi Day in other countries

This site uses cookies. By continuing to use this website, you agree to our policies regarding the use of cookies.