exploratorium

Community Pi (π) Day

Thursday, March 14, 2019 • 10:00 a.m.–5:00 p.m.

All Ages

Note: Pay what you wish on Community Days, when museum entry is on a first-come, first-served basis. Entry is subject to capacity; admission is not guaranteed. We don't accept group or field trip reservations; group entry is discouraged due to large crowds.


Welcome to our 32nd annual π Day! Help us celebrate this never-ending number (3.14159 . . .) and Einstein's birthday as well. On the afternoon of Thursday, March 14, 2019, visit us for Community Pi (π) Day, participate in π-related activities, and enjoy a piece of pie. 

Founded at the Exploratorium by our own Prince of π, physicist Larry Shaw, π Day has become an international holiday, celebrated live and online all around the world.

Be sure to share your π Day spirit with #PiDaySF and @Exploratorium.

Schedule of Events

10:00 a.m.–5:00 p.m.
Nanojems:® Million Digits of π
Gallery 4 Corridor, Microscope Imaging Station

10:00–4:30 p.m.
π Activities with the Explainers
Bechtel Gallery 3

Noon
Why π? with Ron Hipschman and Lori Lambertson
Bechtel Gallery 3, Wattis Webcast Studio

1:30 p.m.
π Procession Gathers
Gallery 4

1:59 p.m.
π Procession Begins
Gallery 4

1:59–2:45 p.m.
π Day Band a.k.a. Mission Delirium
Gallery 5

2:15 p.m.
Pie Serving!
Gallery 5


V-I-Pi Day Donor Reception
4:00–6:00 p.m.
Osher Gallery 1, Kanbar Forum

Exploratorium donors are invited to join us for special access and all-ages activities as part of our community-wide celebration of Community Pi (π) Day. RSVP required—watch your inbox for your invitation.