Come spring, everyone's a joker about math. That's because every March 14 — 3.14, that is — is Pi Day, so named for the set of numerals that make up its date. Sure, pi is technically the ratio of the ...

Happy Pi Day! For decades, math lovers have been honoring this crucial irrational constant on March 14 (or 3/14, the first three digits of the ratio of a circle's circumference to its diameter) every ...

Pi Day is such a huge holiday that it's hard to imagine it didn't exist until 1988. The first party in honor of the amazing mathematical entity known as "pi" began that year when Larry Shaw, a ...