National Pi Day is celebrated on March 14 to recognize the mathematical constant, with the first three digits as 3.14, according to National Day Calendar. The Pi symbol represents the ratio ...

Pi Day, celebrated on March 14, honours mathematical constant Pi, recognising its significance in mathematics, particularly ...

Simply put, pi is a mathematical constant that expresses the ratio of a circle’s ... It wasn’t given its name until 1706, ...

Simply put, pi is a mathematical constant that expresses the ratio of ... when Welsh mathematician William Jones began using the Greek symbol for the number. Why that letter?

When is National Pi Day 2025? What to know about Pi Day activities for kids, songs, movies, jokes, deals, snack ideas and more.