π Day March 14, 2019
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, participate in π-related activities and enjoy a piece of pie. And join us for After Dark: Pi(e) from 6:00–10:00 p.m.
Founded at the Exploratorium by our own Prince of Pi, physicist Larry Shaw, π Day has become an international holiday, celebrated live and online all around the world.
Learn about the long and rich history of pi.
Try these fun pi activities at home.
Learn about how pi inspired a celebration and became a national holiday.
Celebrate the endless number π with mathematical antics and plenty of pie.
Don’t miss Pi Day, the Exploratorium’s favorite holiday.
Pi Day isn't just a day—it's a way of life.
