Today, March 14th, is the annual celebration of the mathematical constant π (pi). Pi Day is observed on March 14 (3/14 in the month/day format) since 3, 1, and 4 are the first three significant digits of π. And it is not just because some mathematicians got together and said so, on March 12, 2009, the U.S. House of Representatives passed a non-binding resolution (111 H. Res. 224), recognizing March 14th as National Pi Day. So, its official… in a non-binding kind of way. Continue reading →