It may seem irrational to some, but we celebrate the number pi (π) every year on March 14, since 3/14 represent the first three digits of pi's decimal expansion. NBC News reports that pi is more than ...

Pi Day,” which is March 14, 3.14, is a day meant to recognize the special, infinite number that can also be recognized by its ...

Saturday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its diameter and equals 3.14... Schools and museums often plan events to ...

Today is Pi Day for 2026, the universal celebration of an amazing, mysterious, and irrational mathematical constant. What's ...