DOOMSDAY Learn how to mentally determine the day-of-the-week for any date in the year
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day Date to Day Day by Date day calculator day of the week doomsday algorithm determine DOW doomsday DOW guess week day day-in-year what day of the week

DOOMSDAY Description

Amaze your friends! Convince them that you're an idiot savant and not the just-plain-idiot they've always thought you were. Win bar bets! The so-called doomsday algorithm is a neat trick designed to help you to mentally determine day-of-the-week (DOW) for any date. It's amazing how frequently this trick will come in handy.

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