Day of Week Finder
Find the weekday for a selected calendar date with localized weekday names.
How to use
- Choose a date.
- Run the calculation.
- Read the weekday and the normalized YYYY-MM-DD date.
Capabilities and scope
Use a single date to determine which day of the week it falls on, for past or future scheduling checks.
How it works
The input becomes a UTC calendar date; its UTC weekday index (Sunday 0 through Saturday 6) is then mapped to the localized weekday label.
Example
January 1, 2026 is reported as Thursday.
Useful for
- Check the weekday of a past event
- Review a future schedule by weekday
- Verify weekday fields in date data
Before you use it
- This is a proleptic software-calendar calculation, not a reconstruction of historical local calendar reforms.
Frequently asked questions
Can time zones change the result?
The tool calculates the weekday of the selected YYYY-MM-DD itself using a UTC date-only representation.
Can I check past and future dates?
Yes, within the date range supported by the browser input.