# Pi Written on a Pi Pie on Pi Day

Whether you’re looking for an excuse to eat dessert or just love mathematics, March 14th is a good day for geeks, nerds, and the rest of the world too. The third month and the fourteenth day, 3.14, is known as Pi day, after the simplest and most ubiquitous constant in nature (no disrespect to c, e, g, or h). Defined as the ratio of a circle’s circumference and it’s diameter, Pi is an irrational number, meaning there is no end to its digits. Most people know 3.14159, but some people have memorized hundreds more digits. Mathematicians armed with supercomputers have calculated Pi to...