March 14 marks Pi Day, an annual celebration of the mathematical sign pi. Founded in 1988 by physicist Larry Shaw, March 14 was selected because the numerical date (3.14) represents the first three digits of pi, and it also happens to be Albert Einstein’s birthday—the perfect pi-incidence.

When Pi Day is celebrated around the world?

Every year on March 14, the world celebrates Pi Day to recognise the mathematical constant, Pi. It defines as the ratio of a circle’s circumference to its diameter and the value for Pi is 3.14.

Why is March 14th Pi Day?

Pi Day is held every year on March 14 to celebrate the mathematical constant, Pi (π). The date, when written in the format of month/day (3/14), matches the first three digits of the mathematical constant. Pi represents the ratio of the circumference of any circle to its diameter.