Pi Day

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:

    “Re-born, he was in the other life, the greater day of the human consciousness. And he was lone and apart from the little day, and out of contact with the daily people.”
    —D.H. (David Herbert)