Event Name: Pi Day Date: March 14 Description: in 212 BC Archimedes discovered something that would revolutionize math.. he discovered a rather irrational number that would allow anyone to calculate the area of a circle.. Pi has made otherwise impossible math rather easy... On march 14 around the world millions of people celebrate the day of this remarkable number.. So grab your protractors, sharpen your pencils and charge your calculators because Pi day is coming your way!