Doomsday rule (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Doomsday rule" in English language version.

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  • John Horton Conway, "Tomorrow is the Day After Doomsday" (PDF). Eureka. October 1973. p. 29-30. Each ordinary year has its Doomsday 1 day later than the previous year, and each leap year 2 days later. It follows that within any given century a dozen years advances Doomsday by 12 + 3 = 15 days = 1 day. ('A dozen years is but a day.') So we add to the Doomsday for the century year the number of dozens of years thereafter, the remainder, and the number of fours in the remainder.

arxiv.org

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  • John Horton Conway, "Tomorrow is the Day After Doomsday" (PDF). Eureka. October 1973. p. 28-32.

worldcat.org

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