Math fanatics from all around the world and everyone else who just loves ancient Greek pi (or pie) celebrate on March 14.

March 14 — a day you’re more likely than most others to eat — or throw — a pie and get a reduced price on your pizza. It’s ...

Happy Pi Day! The special day is celebrated around the world on March 14 in honor of the Greek letter Pi, which is also the ...

Simply put, pi is a mathematical constant that expresses the ratio of a circle’s circumference to its diameter. It figures into numerous formulas used in physics, astronomy, engineering and other ...