Pi Day 1969

Friday, 14 March 1969

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 1969?
Pi Day 1969 is on Friday, 14 March 1969.
What day of the week is Pi Day 1969?
It falls on Friday.
How is Pi Day calculated?
This event is observed every year on 14 March.