Find the day of the week for any calendar date, past or future, shown in your language.
Calculations happen locally. We do not send your values to our server.
The first Moon landing on July 20, 1969 fell on a Sunday, January 1, 2000 was a Saturday and the leap day February 29, 2024 was a Thursday. Future dates work too: January 1, 2100 will be a Friday.
The date you enter is treated as a local calendar day at midday, which keeps it clear of ordinary time-zone shifts, and its weekday is read from the Gregorian calendar. The full date is shown alongside the weekday so you can confirm that the right day was entered.
The Gregorian calendar is extended backwards for early dates, but countries adopted it at different times, so a date copied from an old document may belong to the Julian or another local calendar. Convert such a date before relying on the weekday shown here.
Enter a date and the calculator returns the day of the week in your language, along with the full date for confirmation. The first Moon landing on July 20, 1969 fell on a Sunday, January 1, 2000 was a Saturday and the leap day February 29, 2024 was a Thursday. Future dates work the same way: January 1, 2100 will be a Friday. This is useful for planning events, checking historical records or confirming what day a deadline lands on.
A normal year of 365 days is 52 weeks plus 1 day, so the same date usually moves one weekday later each year. A leap year adds a second extra day, so dates after February 29 move two weekdays. That is why September 15 was a Monday in 2025 and is a Tuesday in 2026. Leap years occur every four years, except century years not divisible by 400, which is why 2000 was a leap year and 2100 will not be.
The tool uses the Gregorian calendar extended backwards in time. The Gregorian calendar began on Friday, October 15, 1582 in several Catholic countries, the day after Thursday, October 4 in the older Julian calendar, but many countries switched later: Britain and its colonies in 1752, Japan in 1873 and Russia in 1918. A date written in an old document may use the Julian or another local calendar, so convert it before trusting the weekday shown here.
| Input | Result |
|---|---|
1969-07-20 | Sun |
2000-01-01 | Sat |
2024-02-29 | Thu |
2026-09-15 | Tue |
2100-01-01 | Fri |
1582-10-15 | Fri |
A normal year of 365 days is 52 weeks plus 1 day, so a date usually moves one weekday later each year. A leap year adds a second extra day, so dates after February 29 move two weekdays. That is why September 15 was a Monday in 2025 and is a Tuesday in 2026.
Every fourth year, except century years that are not divisible by 400. That is why 2000 was a leap year while 2100 will not be, and it is also why the weekday pattern repeats over a long cycle rather than a simple four-year one.
You can, but read the result carefully. The Gregorian calendar began on Friday, October 15, 1582 in several Catholic countries, the day after Thursday, October 4 in the older Julian calendar. Britain and its colonies switched in 1752, Japan in 1873 and Russia in 1918, so dates before those changes need conversion first.
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