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

Explore the origins of Pi Day from San Francisco's Exploratorium to global recognition, blending math, culture, and pie in a ...

Add Yahoo as a preferred source to see more of our stories on Google. Today marks National Pi Day in the United States and around the world. The holiday commemorates a timeless symbol beloved by many ...

The mathematical calculation is honored every March 14.

Learn these interesting facts about pi before Pi Day on March 14 Facts about pi you don’t want to miss How much do you really know about pi? Sure, you’ve heard about it in math class, but this famous ...