March 14 is pi day. Explore math fun, pie and pizza deals, and creative ways to celebrate the number π this year.

Pi Day 2026 is celebrated on March 14 to honour the mathematical constant π (3.14). Learn its history, significance, world records and fun ways people celebrate this global math day.

Every year, math nerds and dessert enthusiasts unite to celebrate Pi Day on March 14, a date whose digits represent the first ...

March 14 is celebrated as Pi Day because the date, when written as 3/14, matches the start of the decimal expansion 3.14159… of the most famous mathematical constant. By itself, pi is simply a number, ...

Unlike pi, these Pi Day jokes won't go on forever—but the LOLs will keep going for a while! Punny Pi Day jokes everyone will ...