Day of the Week Calculator: Find Any Date’s Weekday
Enter a past or future date to find its day of the week and ordinal day of the year.
How to use Day of the Week Calculator: Find Any Date’s Weekday
Enter a calendar date to see its weekday and ordinal day of the year.
Displayed values follow the definitions stated above.
Find the weekday for any calendar date
Check the weekday of a past or future birthday, anniversary, deadline or event without paging through a calendar. The result also shows the date’s ordinal position in the year.
The calculation uses the local calendar date without a clock time or time-zone conversion.
Recommended steps
- Enter the year, month and day.
- Read the weekday and ordinal day of the year.
- Open the ISO week calculator if you also need the week number.
How to interpret the result
- The calculator uses the modern Gregorian calendar.
- January 1 is ordinal day one.
- After February 29, a leap year’s ordinal day is one greater than in a common year.
Frequently asked questions
Can it calculate future weekdays?
Yes. Past and future dates use the same Gregorian calendar rules within the browser’s supported range.
Are leap years handled automatically?
Yes. February 29 and the ordinal day are calculated with Gregorian leap-year rules.
Does it also show the week number?
This page shows the weekday and ordinal day. Use the ISO week number calculator for the week-numbering year and week.