Larry Shaw created Pi Day in 1988. The holiday was celebrated at the San FranciscoExploratorium, where Shaw worked as a physicist, with staff and public marching around one of its circular spaces, then consuming fruit pies. The Exploratorium continues to hold Pi Day celebrations.
On Pi Day 2004, Daniel Tammet recited 2 964 decimal digits of π.
http://www.pi-world-ranking-list.com/lists/details/tammet.htm
On March 12, 2009, the U.S. House of Representatives passed a non-binding resolution (HRES 224), recognizing March 14, 2009, as National Pi Day.
For Pi Day 2010, Google presented a Google Doodle celebrating the holiday, with the word Google laid over images of circles and pi symbols.
At 9:26:53 on Pi Day 2015, the date will be 3/14/15 at 9:26:53, corresponding to 3.141592653.
http://en.wikipedia.org/wiki/Pi_Day
http://www.piday.org/
Happy Pi Approximation Day today!
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