Pi Day 2020

Welcome to our 33rd annual π Day! Help us celebrate this never-ending number (3.14159 . . .) and Einstein's birthday as well. 

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.