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Nov 9, 2020 · One especially remarkable algorithm he developed around 1970 is the Doomsday rule. The name may sound a little odd, but the algorithm is amazing: It allows you to calculate the day of the week for any given date in your head.
A doomsday device is a hypothetical construction — usually a weapon or weapons system — which could destroy all life on a planet, particularly Earth, or destroy the planet itself, bringing "doomsday", a term used for the end of planet Earth.
The Doomsday rule, Doomsday algorithm or Doomsday method is an algorithm of determination of the day of the week for a given date. It provides a perpetual calendar because the Gregorian calendar moves in cycles of 400 years.
Apr 26, 2020 · Doomsday method: Year code = 0, Century adjustment = 3, so Doomsday was a Wednesday in 1900. Closest Doomsday = Jan. 3 (since 1900 isn’t a leap year), so January 30 (27 = 28 – 1 days later) was a Tuesday.
John Conway Doomsday Device: John Conway is a legendary mathematician who among his many achievements, devised a simple algorithm for figuring out in your head on what day of the week any calendar date would fall.
The Doomsday algorithm is a method devised largely by John Conway for mental calculation of the day of the week. There is a key step in this that is the most work, and there are many different ways that step can by done.
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Luckily, there exists a method, devised by John Conway, to calculate the day of the week of any given day, known as The Doomsday Algorithm. With a little memorization and some practice, you can calculate an answer without needing a phone or an online calendar.
