From schoolkids learning about constant numbers to pizza deals to school serious math equations, here’s a slice of Pi Day fun.

From there a day of celebrating science and mathematics was born: Pi Day. More than three decades on and the day is celebrated worldwide, with the sharing of pi trivia, mathematical problems, and the baking of the most famous of circular deserts: the pie.

March 14 is officially recognized as Pi Day, as 3.14 represents the first three digits of the infinite, non-repeating number. Many remember using pi in school as the ratio of