Pi Day in 2023

Pi Day Quick Facts - US 2023

2023 DateMarch 14, 2023
2024 DateMarch 14, 2024

Pi Day

Pi Day in
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Pi Day in 2023

Pi Day celebrates the mathematical constant π (pi), 3.141592653... Pi is the ratio of a circle's circumference to its diameter. The circumference of a circle is defined as its arc length while the diameter is defined as the longest chord of the circle.

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