Tool capabilities
- Input
- TXT
- Output
- TXT · JSON
How to use Day of Week Finder
Find the localized weekday and ISO weekday number (Monday = 1) for a date. This day of week finder works directly in your browser and is free to use without an account.
- Paste or open your input in the editor.
- Run the tool and inspect the output. If the input is invalid, correct the reported error and run it again.
- Copy the result or download it to your device.
Day of Week Finder · Example
Input
2026-09-08
Output
{
"weekday": "Tuesday",
"isoWeekday": 2
}Find the localized weekday and ISO weekday number (Monday = 1) for a date.
Usage notes
Inputs and results are processed on this device. Tool content is not sent to a processing server.