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Pi (π) Day

A procession at the pier led by a dark-haired woman holding up a red, white, and blue flag with Pi on it
Pi (π) Day

Join the 37th annual celebration of our 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 for the STEAM and stay for the slice! 

Pi Procession
1:59 p.m.
Gordon and Betty Moore Gallery 4: Living Systems
With Mission Delirium

Grab a pi digit and get in line for the annual Pi Procession! A high-spirited crowd parades through the museum and circles the Pi Shrine 3.14 times, waving the digits of pi and dancing along to San Francisco brass band Mission Delirium. All participants will enjoy a free slice of pie following the parade.

Mission Delirium is a 12-piece brass and percussion band featuring some of the most enthusiastic musicians whose mission is to put a groove in your step.

Pie Serving
2:15 p.m.
Gallery 5: Outdoor Exhibits
With Seaglass Restaurant

A sweet treat awaits celebrants at the end of the Pi Procession. Grab a slice of pie and enjoy live music by brass band Mission Delirium while you eat.

Helmed by Chef Loretta Keller, Seaglass Restaurant is located inside the Exploratorium.

Why Pi?
Bechtel Gallery 3

Find out what’s so special about the famous mathematical constant through its history and interactive demos. 

Pi Demos
10:30 a.m.–1:30 p.m. and 2:30–5:00 p.m.
Bechtel Gallery 3

There’s more than one way to slice it! Learn how to calculate pi with a variety of hands-on demos.