Day of the Week Calculator
Enter a date and see what day of the week it was or will be. The form starts with today.
Day of the week
Worked examples
- January 1, 2000 was a Saturday.
- February 29, 2024 was a Thursday.
- January 1, 2026 was a Thursday.
- March 1, 2030 will be a Friday.
- December 25, 2030 will be a Wednesday.
Frequently asked questions
What does "day of the week" mean here?
It is the weekday name for any date in the Gregorian calendar, including historical and future dates.
Do leap days change the weekday calculation?
No. The weekday is determined by the absolute date, so February 29, 2024 was a Thursday regardless of being a leap day.
What format should I use for the date?
Pick the MM-DD-YYYY, DD-MM-YYYY, or YYYY-MM-DD format selector that matches how you read the date. The result is the same weekday.
Will the same date always have the same weekday?
Yes. The weekday is deterministic for any valid Gregorian date and does not depend on your locale or time zone.