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Pi Day: March 14

The popularity of Pi Day (3.14) has taken off in recent years. This symbol, the Greek letter π, is used to represent a constant numerical figure in mathematics. The ratio of the circumference of a circle to its diameter — which is approximately 3.14159.

Pi has been calculated to over a trillion digits as it is said to repeat infinitely without repetition or pattern. Many people now celebrate this quirky numeric day by baking their favorite flavor pie, hosting pie-eating contests, and doing basic math equations.