how long have we been celebrating pi day
1988 2009
title: Pi Day text: the "month/day" format). In 1988, the earliest known official or large-scale celebration of Pi Day was organized by Larry Shaw at the San Francisco Exploratorium, 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 March 12, 2009, the U.S. House of Representatives passed a non-binding resolution (), 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; title: Pi Day text: Pi Day Pi Day is an annual celebration of the mathematical constant (pi). Pi Day is observed on March 14 (3/14 in the "month/day" format) since 3, 1, and 4 are the first three significant digits of . In 2009, the United States House of Representatives supported the designation of Pi Day. Pi Approximation Day is observed on July 22 (22/7 in the "day/month" format), since the fraction is a common approximation of, which is accurate to two decimal places and dates from Archimedes. Two Pi Day, also known as Tau Day, is lightly observed on June 28 (6/28 in title: Pi Day text: and for the 30th anniversary in 2018, it was a Dominique Ansel pie with the circumference divided by its diameter. The entire month of March 2014 (3/14) was observed by some as "Pi Month". In the year 2015, March 14 was celebrated as "Super Pi Day". It had special significance, as the date is written as 3/14/15 in month/day/year format. At 9:26:53, the date and time together represented the first 10 digits of . Pi Day has been observed in many ways, including eating pie, throwing pies and discussing the significance of the number , due to a pun based title: Pi Day text: 2, also known by the Greek letter tau (τ) is a common multiple in mathematical formulae. Some have argued that τ is the more fundamental constant, and that Tau Day should be celebrated instead. Celebrations of this date jokingly suggest eating "twice the pie". Princeton, New Jersey, hosts numerous events in a combined celebration of Pi Day and Albert Einstein's birthday, which is also March 14. Einstein lived in Princeton for more than twenty years while working at the Institute for Advanced Study. In addition to pie eating and recitation contests, there is an annual Einstein look-alike contest. Pi Day title: Larry Shaw (Pi) text: 1:59 p.m. with visitors holding a sign with a digit of pi, a pi shrine, eating of pies (fruit and pizza), singing happy birthday to Albert Einstein, and more. Larry Shaw would lead the parade in his red cap with the digits of pi. Pi Day was recognized as a national holiday in 2009 and is internationally celebrated. Also, 2015 was a special year with it being written 3/14/15, calling it "Pi Day of the Century". Shaw felt the best thing about Pi Day was making math more accessible, fun for those who may have had problems in school. When