24th Annual Pi Day March 14, 2012

From San Francisco to Shanghai, in museums, universities, classrooms, and in private homes around the world, people are celebrating the 24th Annual Pi Day -- an international holiday born at San Francisco’s Exploratorium. The number is Pi (π), 3.1415926535…ad infinitum. It’s the number you get when you divide the circumference of a circle by its diameter. It’s also the date and time of festivities at the Exploratorium and a special occasion to celebrate some of the Exploratorium’s quirky scientific traditions before the museum moves to Pier 15 in 2013.

Official Website: http://press.exploratorium.edu/24th-annual-pi-day-march-14th-2012/