Pi Day
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Pi day is a holiday celebrating mathematics.
March 14 marks Pi Day, a facetious holiday on which the mathematical constant is celebrated. The date comes from the first three digits of pi; some people begin their celebration at 1:59 pm, derived from the following three digits.
Pi Approximation day is a similar holiday, celebrated on July 22 (from the approximation 22/7). [3]
See also: pi