mathematical holiday on March 14
Pi Day is a celebration held on March 14th each year to honor the mathematical constant pi (π), which represents the ratio of a circle's circumference to its diameter. The date is chosen because it matches the first three digits of pi (3.14), and the day is observed by mathematicians and math enthusiasts around the world.
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Pi Day is an annual celebration of the mathematical constant π (pi) with events mostly in the United States. Pi Day is observed on March 14 (the 3rd month) since 3, 1, and 4 are the first three significant figures of π and was founded in 1988 by Larry Shaw, an employee of the Exploratorium, a science museum in San Francisco.
Celebrations often involve eating pie or holding pi recitation competitions. In 2009, the United States House of Representatives supported the designation of Pi Day. UNESCO's 40th General Conference designated Pi Day as the International Day of Mathematics in November 2019.
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