Pi Day is the international event invented by the Exploratorium in San Francisco and celebrated every year on 3/14 at 1:59 pm (the first five values of pi).
The Exploratoriumís 25th Annual Pi Day celebration will be from 1 to 3 p.m., Thursday, March 14, 2013 outside Pier 15. Pi Day activities will include the Pi Procession, pizza tossing, quirky pi presentations by Exploratorium staff e, and other interactive pi activities. In addition, a new Pi Shrine will be ceremoniously placed on the public plaza in front of the museum before the Pi Procession and pi rituals are performed and pie (in various forms) eaten.
As is customary on Pi Day, a delectable selection of edible pies will be available for participants to enjoy. But perhaps the most spectacular homage to pi on March 14 will be seen directly overhead at 1:59 p.m. as the artist ISHKY, in collaboration with AirSign, coordinates a team of five synchronized aircraft equipped with dot matrix technology to skywrite the first 314 numbers of piís infinite sequence at just over 10,000 feet altitude above the Exploratoriumís new home at Pier 15 (weather permitting). Each number will measure over a quarter-mile in height, and the aircraft will fly in a loop beginning over Pier 15 and across the waterfront and San Francisco Bay Area communities.
Pi Day is free and will be held outdoors, in front of the Exploratoriumís new home. The museum will not be open during Pi Day; the museumís grand opening is April 17, 2013. For details about Pi Day, please visit: http://www.exploratorium.edu/pi