March 14 is Pi Day — here’s what that means

March 14, written out as 3/14 in the US and a few other countries, is π day, as those are the first three digits of the famous number. π is one of the most important and fascinating numbers in math.

Happy π day! 

March 14, when written out in the American date style of month/day, comes out as 3/14. That coincides with the three first digits of π: 3.14.

π is one of the most

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