Pi Approximation Day
From Giftypedia
When Celebrated
Always on July 22nd
Gifty-ness
About the Holiday
Pi Approximation Day is a Math Holiday held on 7/22 as 22/7 is a commonly used simple approximation for Pi. The Pi constant represents the ratio between the circumference of a circle to its diameter. It's a number of extreme usefulness in science and engineering and its approximation has great intrigue.
Similarly, Pi Day is held on 3/14. We were unable to locate the origination or creator of Pi Approximation Day.
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