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Day of the Week Calculator

Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can find day of the week for any given date and get answers to questions like What day you were born?

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Enter date:

* The Gregorian calendar is the most widespread civil calendar and de facto international standard.


Day of the week calculation

The formula for finding "What day of the week was?" (This method is valid for both the Gregorian calendar and the Julian calendar):
dotw = (d + m + y + ⌊y/4⌋ + c) mod 7, where:

If the result is 0, the date was a Sunday; if 1 it was a Monday, and so on through the week until 6 = Saturday.

See this Wikipedia entry for complete details and other ways for calculating day of week.

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