justyourcalculatorDay of the Week Calculator
Find the weekday for any date, past or future.
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Day of the Week Calculator
What day of the week any date falls on
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How the day of the week calculator works
The weekday comes from the Gregorian calendar, which repeats every 400 years. The worked steps use Zeller's congruence, a formula that turns the day, month and year into a number from 0 (Saturday) to 6 (Friday).
Dates before the Gregorian calendar was adopted (1582 in much of Europe, 1752 in Britain and its colonies) are shown in the proleptic Gregorian calendar, so they may differ from historical records.
Using and checking your result
Published by JustYourCalculator. Check the units and assumptions above, and compare a known example before relying on the output. Calculations use browser arithmetic and may round displayed values.
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