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There are two days held in honour of the mathematical constant π ( Pi): Pi Day and Pi Approximation Day.1 Pi day
March 14, written 3/14 in the USA date format, is the official day 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, say that 1:59 PM is actually 13:59 and celebrate it at 1:59 AM instead. Parties have been held by mathematics departments of various schools around the world.
March 14 is also Albert Einstein's birthday.
This day has been celebrated in a variety of ways. Groups of people, typically pi clubs, give thought to the role that the number π has played in their lives and imagine the world without π. During such an event, pi celebrants may devise alternative values for π, eat pi ( pie), play pi ( piñata), or drink pi ( piña colada).
2 Pi Approximation Day
Pi Approximation Day is one of two days: either July 22 (written 22/7 — 22 divided by 7 is an approximation to π — in some date formats), or April 26, the day on which planet Earth completes approximately two Astronomical units' worth of its annual orbit: on this day the total length of Earth's orbit, divided by the length already travelled, equals π.
3 See also
Mole Day, Square root day, A simple proof that 22/7 exceeds piThe rational number 22/7 is a common approximation of the transcendental value &pi . Its value is greater than π, as can be readily seen in the initial, established decimal places for these values: 22/7 ≈ 3. pi; ≈ 3. What follows is a mathe
4 External links
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