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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 = 2, so Doomsday was a Tuesday in 1900. Closest Doomsday = Jan. 4 (since 2000 is a leap year), so January 30 (26 = 28 – 2 days later) was a Sunday.
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 Antikythera mechanism ( / ˌæntɪkɪˈθɪərə / AN-tik-ih-THEER-ə, US also / ˌæntaɪkɪˈ -/ AN-ty-kih-) [ 1][ 2] is an Ancient Greek hand-powered orrery (model of the Solar System), described as [weasel words] the oldest known example of an analogue computer [ 3][ 4][ 5] used to predict astronomical positions and eclipses decades in advance. [ 6][ 7...
May 17, 2017 · What is the Antikythera mechanism? At first glance, the piece of brass found near the wreck looks like something you might find in a junkyard or hanging on the wall of a maritime-themed dive...
Jan 1, 2022 · The device appears to be a geared astronomical calculation machine of immense complexity. Today we have a reasonable grasp of some of its workings, but there are still unsolved mysteries.
The Doomsday rule is a method devised by John Conway for computing the day of the week of any given date. The method is based on first computing Doomsday, which is the day of the week of the last day of February. First of all, we need a method of numbering the days of the week. We regard Sunday as Day 0, Monday as Day 1, Twosday as Day 2, etc.
