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Doomsday rule
(
wikipedia.org
)
2 points
by
eru
on Dec 16, 2010
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1 comment
eru
on Dec 16, 2010
[–]
> Conway can usually give the correct [weekday for any given date] in under two seconds. To improve his speed, he practices his calendrical calculations on his computer, which is programmed to quiz him with random dates every time he logs on.
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