Home » City Guide »

Pi Day 2018 (3.14)

Free day at the Exploratorium, nerd parties and $3.14 food truck specials
By - posted 3/12/2018 No Comment

Any day can be a holiday, and so for math nerds and pie lovers, March 14th is an extra special mathematical date.

Pi (aka π) is the ratio of a circle’s circumference to its diameter which comes out to roughly 3.14. So March 14th has been dubbed “Pi Day”-  a quirky and fun celebratory day of both Pi (and pie) which was actually popularized right here in San Francisco back in 1988.


Thursday, March 14

2024 Pi (π) Day Celebration at The Exploratorium
2024 Pi (π) Day Celebration at The Exploratorium
Join the 37th annual celebration of Exploratorium’s own homegrown holiday! March 14th (3/14) commemorates the irrational, transcendent, and never-ending ratio that helps describe circles of all sizes. Explore math-inspired activities and presentations, then join our Pi parade and eat a free piece of pie. Come ...