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National Pi Day

March 14th, 2025

Web site: http://www.piday.org

National Pi Day celebrates the mathematical constant number 3.14 ..., which refers to the ratio of the circumference of a circle to its diameter. Pi is an infinite number, and has been calculated to millions of decimal points. It's an opportunity for math enthusiasts to discuss Pi and mathematics in general. Many people also enjoy eating pie on this day, in relation to Pi's homonym "pie."

Restaurants that serve pizza and pie often offer discounts on items today in honor of National Pi Day. Some may feature prices of $3.14 that coordinate to Pi.

 
Additional March Events

National School Breakfast Week
March 3rd - March 7th

National Healthy Fats Day
March 21st, 2025

 
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