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Day of the Week Calculator
Find out what day of the week any date falls on — past or future — along with the day of the year and the ISO week number for that date.
About Day of the Week Calculator
Enter any date — a birthday, a historical event, a future deadline — and this calculator tells you which day of the week it falls on, using the proleptic Gregorian calendar. It also shows the day of the year and the ISO week number, so you can place the date precisely within its year.