Overview

• National Pi Day celebrates the mathematical constant π (pi), representing the ratio of a circle's circumference to its diameter.
• The day also honors the history of π, dating back to the Babylonians and Greek mathematician Archimedes.
• In 1988, physicist Larry Shaw initiated Pi Day at San Francisco's Exploratorium to make math more fun.
• The U.S. House of Representatives recognized March 14 as National Pi Day in 2009, with deals on pies and pizzas becoming a tradition.
• Famous scientists born on March 14 include Albert Einstein, enhancing the day's significance.