National Pi’e’ Day [3.14]
Pi day was originally observed March 14 because of the date being 3.14, a number very close to pi’s value. The holiday was created 1988 by Larry Shaw to celebrate the San Francisco “Exploratorium”. In recent years it’s become a day for making a pie as well as celebrating the ancient mathematical constant that relates the length a circle’s circumference to the perimeter of a square of the same area as the original circle. March 14 is also Albert Einstein’s birthday.