Certified tool
Day of Week Calculator
Find the weekday for any valid calendar date.
Weekday
Thursday
Thursday, February 29, 2024 is a Thursday.
ISO-8601 weekday number: 4 (Monday = 1, Sunday = 7). Calendar date 2024-02-29.
Assumptions
- The weekday is computed from the Gregorian civil date.
- ISO weekday numbers use Monday = 1 through Sunday = 7.
- Invalid calendar dates such as 2023-02-29 are rejected.
- No timezone conversion is applied to the entered date.