National Pi Day – March 14

March 14, 2019

Pi Day is a holiday which is celebrated on March 14th every year. This day was created to celebrate the mathematical constant π – the most famous constant in math and physics: the number you get when you divide the circumference of a circle by its diameter. It falls on 3/14 since three, one and four are the first three digits of PI. It is a holiday that has been celebrated large-scale since 1988 and has been celebrated by millions upon millions of math students and teachers since.

While PI Day may have existed in one form or another, the first official large-scale celebration occurred on March 14th, 1988 at the San Francisco Exploratorium. This event was organized by physicist Larry Shaw. 

One of funniest activities on PI Day is having people recite PI and see who can get the furthest. While this may seem like an easy game at first, it really isn’t once you realize that PI has been calculated to over 5 trillion digits past its decimal point.
 

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