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Pi Day

Ted Fitzgerald/MediaNews Group/Boston Herald via Getty Images

What is Pi Day and why do we celebrate the holiday?

  • Mar 14, 2025

Pi Day mates math with pizza, dessert

  • Mar 14, 2023
Shutterstock

Indiana once tried to define pi as 3.2; the bill almost passed

  • Mar 14, 2022

Celebrating Pi Day 2022: Pizza deals, circles and math

  • Mar 14, 2022

Latest Videos

2:57

Celebrating Pi Day 2022: Pizza deals, circles and math

  • Mar 14, 2022
2:54

Celebrate Pi Day 2021 with circles, crafts, pizza

  • Mar 14, 2021
1:37

Which will you choose: Pi or Pie Day?

  • Mar 14, 2019
2:25

Geneva elementary school student recites Pi to the 1011th digit

  • Mar 15, 2017