Pi Day is an annual celebration of the mathematical constant π (pi). Pi Day is observed on March 14 since 3, 1, and 4 are the first three significant figures of π, and it was first celebrated in the United States. It was founded in 1988 by Larry Shaw, an employee of the San Francisco science museum, the Exploratorium. Celebrations often involve eating pie or holding pi recitation competitions. In 2009, the United States House of Representatives supported the designation of Pi Day. UNESCO's 40th General Conference designated Pi Day as the International Day of Mathematics in November 2019.
Larry Shaw, the organizer of the first Pi Day celebration at the Exploratorium in San Francisco
Pi Day related offering at Delicious Orchards, a country food market in Colts Neck, New Jersey
Pi Pie at Delft University
A grocery store selling pies for $3.14 on Pi Day
The Exploratorium is a museum of science, technology, and arts in San Francisco, California. Founded by physicist and educator Frank Oppenheimer in 1969, the museum was originally located in the Palace of Fine Arts and was relocated in 2013 to Piers 15 and 17 on San Francisco's waterfront.
Main entrance to the Exploratorium at Pier 15
Frank Oppenheimer, founder of the Exploratorium
Outdoors "Rust Wedge" display shows the enormous expansive force of rusting iron
The design scheme for the Exploratorium's Seaglass Restaurant was inspired by the exhibit Color of Water.
