Doomsday rule

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

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.

Excerpt from the Wikipedia article “Doomsday rule”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: "Thane Plambeck", CC BY 2.0, via Wikimedia Commons.