Pi Day
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Pi day is a holiday celebrating mathematics.
Pi Day, a holiday celebrating the mathematical constant Pi is observed on March 14. Celebrations often involve eating pie, cookies or some other spherical delicacy. The date comes from the first three digits of pi (3/14) (in american notation) with some people beginning their celebration at 1:59:26.5 (the following digits (3.14159265)). Many Elementary and Middle School teachers use March 14 to introduce their students to the concept of Pi
Pi Approximation day is a similar holiday, celebrated on July 22 (from the approximation 22/7).