National Pi Day

Category
National Pi Day around the world in 2021

About National Pi Day

How long until National Pi Day?
This holiday next takes place in 140 days.
Dates of National Pi Day
2022 InternationalMar 14
International Mon, Mar 14Observances Holiday
2021 InternationalMar 14
International Sun, Mar 14Observances Holiday
2020 InternationalMar 14
International Sat, Mar 14Observances Holiday
2019 InternationalMar 14
International Thu, Mar 14Observances Holiday
Summary
Find out the dates, history and traditions of National Pi Day

Third month, fourteenth day. Pi Day, as in 3.14. Pi Day has become an annual celebration of the mathematical constant pi (π), founded by physicist Larry Shaw. The day also happens to be Albert Einsteins birthday. In 2009, March 14 was officially sanctioned as a U.S. holiday.

Calculating record digits of pi has been a pastime of mathematicians for millennia. Until the 1900s, these calculations were done by hand and reached records in the 500s. Once computers came onto the scene, that number jumped into the thousands, millions and now trillions. In 2019, Google developer Emma Haruka Iwao broke the record held by scientist and pi enthusiast Peter Trueb by calculating pi to 31 trillion digits – 31,415,926,535,897 digits to be exact.

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