Pi Day 2025 is on Friday, 14 March 2025.

How is Pi Day calculated?

This event is observed every year on 14 March.

When is Pi Day 2025?

Name: Pi Day
Start: 2025-03-14
End: 2025-03-14
Location: Worldwide

Friday, 14 March 2025

Pi Day is celebrated on 14 March in honour of the mathematical constant pi (3.14), with educational activities, mathematics events, and playful traditions such as eating pie.

Frequently asked questions

When is Pi Day 2025?: Pi Day 2025 is on Friday, 14 March 2025.
What day of the week is Pi Day 2025?: It falls on Friday.
How is Pi Day calculated?: This event is observed every year on 14 March.