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thar is a large variety of ways of celebrating Pi Day and most of them include eating pie and discussing the relevance of π.[1] The first Pi Day celebration was held at the San Francisco Exploratorium in 1988, with staff and public marching around one of its circular spaces, then consuming fruit pies. The museum has since added pizza to its Pi Day menu.[2] The founder of Pi Day was Larry Shaw,[3] a now-retired physicist at the Exploratorium who still helps out with the celebrations.
Pi Day is observed on March 14, because of the Ancient Greek mathematician Archimedes' first rough approximation of π as being 3.14. (A few years later, Archimedes was able to calculate a much better approximation of π.) However, this date may be considered misleading, because 22/7 is actually a closer approximation of π than 3.14 is. Thus, a "correct" Pi Day could be found in the European calendar, 22/7, or July 22.
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