Date Weekday Calculator
Enter a calendar date to see its weekday and a clear, copy-ready result.
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How to use
- Choose a date in the date field.
- Select Calculate weekday.
- Copy the formatted date and weekday result.
Strict calendar validation
The calculator checks that the entered year, month, and day form a real Gregorian calendar date, including leap years.
English date output
Results use an English weekday and month name so they are easy to read and copy into notes or documents.
Private browser calculation
Date parsing and formatting happen locally in your browser. No date is uploaded or stored.
Frequently asked questions
You may also want to know
Does it handle leap years?
Yes. February 29 is accepted only in a valid leap year.
Which date format should I enter?
Use the date picker or enter a date in YYYY-MM-DD format.
Does this send my date to a server?
No. The weekday is calculated entirely in your browser.