Pi Day is an unofficial holiday commemorating the mathematical constant π (pi). Pi Day is observed on March 14 (or 3/14 in month/day date format), since 3, 1 and 4 are the three most significant digits of π in the decimal form. In 2009, the United States House of Representatives supported the designation of Pi Day.
Pi Approximation Day is observed on July 22 (or 22/7 in day/month date format), since the fraction 22⁄7 is a common approximation of π.
Read more about Pi Day: History, Date Abstractions From π, Observance
Famous quotes containing the word day:
“Boundless in your charity, but shrewd and cautious as a lender, you delight all those today whom you made beggars the day before.”
—Franz Grillparzer (1791–1872)