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Day of the Week Calculator

Find what day of the week any date falls on. Enter any past or future date to instantly see whether it's a Monday, Wednesday, Saturday, or any other day.

How to Find the Day of the Week for Any Date

The Gregorian calendar repeats on a precise 400-year cycle, so every date's weekday can be calculated exactly.

• Example: July 4, 1776 = Thursday

• Example: January 1, 2030 = Tuesday

JavaScript's Date object uses the Doomsday algorithm internally for accurate weekday calculation.



See also