Pi Day is celebrated every year on March 14, written as 3/14, because those are the first three digits of the number pi: 3.14.

Quick Scoop: What Day Is Pi Day?

  • Pi Day is on March 14 each year.
  • The date comes from the beginning of π (pi), which is approximately 3.14.
  • It’s recognized as National Pi Day in the United States and is also celebrated around the world by math fans and pie lovers.

A fun extra: March 14 is also Albert Einstein’s birthday, which adds a bit of science-nerd charm to the day.

TL;DR: Pi Day is March 14 (3/14) every year, chosen because it matches the first digits of π, 3.14.

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