Day of the week calculator

Choose any date, past or future, and the calculator shows its weekday and whether it falls on a weekday or a weekend. It opens with this year's Christmas Day so you can see straight away what day Christmas falls on.

Common questions it answers:

• What day of the week was I born?
• What day is Christmas, New Year's Day or July 4th this year?
• Does my birthday fall on a weekend next year?
• What day of the week was a historical date?

The table lists the weekday of the same date in the chosen year and the five years after it. A date usually moves forward one weekday each year, and two after a February 29 has passed (because 366 days is 52 weeks plus 2 days).

Example: December 25 is a Friday in 2026, a Saturday in 2027 and a Monday in 2028 (skipping Sunday because 2028 is a leap year).

For February 29, the table shows "no such date" in years that aren't leap years.

The calculator uses the Gregorian calendar, the calendar used in the U.S. and most of the world. The Gregorian calendar repeats exactly every 400 years. If you look up very old dates, keep in mind that Britain and its American colonies switched from the Julian calendar in 1752, so dates before then in historical records may be written in the older calendar.

Want to work out weekdays in your head? In any given year, these dates all fall on the same weekday, called the year's "doomsday": 4/4, 6/6, 8/8, 10/10, 12/12, 5/9, 9/5, 7/11, 11/7 and the last day of February. In 2026 they're all Saturdays, so July 4, exactly one week before 7/11, is a Saturday too. Once you know one doomsday, you can count from it to any date.

To count the days until a date, use days left in the year or the date calculator. To find your exact age and the weekday you were born, try the age calculator. Everything runs in your browser.