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I know it’s a bit late, but 22 July (22/7) was Pi Approximation Day.

Piece of pieThe fraction 22/7 is an approximation of pi, the mathematical constant that describes the ratio of a circle’s circumference to its diameter. Pi has an infinite number of non-repeating digits after the decimal point – see this site for the first million digits (or not…) Pi Day is 14 March (3.14), of course!

Pi Day is on 14 March  (3.14).

Piece of pie

Pi has an infinite number of digits but has been calculated to 206,158,430,000 digits.

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