It's March 14th,  which means it's Pi Day!  Pi Day is celebrated all around the world on 3/14.  Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159. Those of you have been paying attention in math probably already knew that.

Pi has been calculated to over one trillion digits beyond its decimal point. Pi’s infinite nature makes it a fun challenge to memorize and as an irrational and transcendental number, it will continue infinitely without repetition or pattern.