Pi Day, Pi Day - Notes, Pi Day - Pi Approximation Day, Pi Day - Pi Day, Newtonmas, Darwin Day, Mole Day, Square root day, Towel Day, Proof that 22 over 7 exceeds π
Pi Approximation Day is one of two days: either July 22 (written 22/7 — in commonwealth/international date format— 22 divided by 7 is an approximation to π), or April 26 (April 25 on leap years), the day on which planet Earth completes two Astronomical units' worth of its annual orbit: on this day the total length of Earth's orbit, divided by the length already traveled, equals π (that is, the Earth has travelled two radians in its orbit).
Another day of approximation is on the 355th day of each year at 1:13pm, based on the approxi ...
March 14, written 3-14 in the USA date format, is an unofficial celebration for Pi Day derived from the common three-digit approximation for the number π: 3.14. It is usually celebrated at 1:59 PM (in recognition of the six-digit approximation: 3.14159). Some, using a twenty-four-hour clock rather than a twelve hour clock, say that 1:59 PM is actually 13:59 and celebrate it at 1:59 AM or 3:09 PM (15:09) instead. Parties have been held by the mathematics departments of ...
