Day of Week Calculator
Pick a date to find the weekday (Monday, Tuesday, etc.). Uses your local timezone and formats weekday names using your browser locale.
Day of Week Calculator tool
Tip: use the date picker to avoid ambiguous formats. The calculation uses local time (midnight).
“Auto” uses your browser locale. A fixed locale can be useful for screenshots or consistent output.
Privacy: runs locally in your browser. No inputs or results are stored or transmitted.
This tool interprets the chosen date as local midnight and uses your selected locale to format the weekday name. That avoids region-specific ambiguity from manual date formats.
Examples
- 2026-03-02 → shows the weekday for that date
- Change locale to “ko-KR” to display 요일 in Korean
FAQ
- Does this use my locale?
Yes. The weekday name is formatted using your browser’s locale settings (for example, English or Korean).
- Does this use my timezone?
Yes. The date is interpreted in your device’s local timezone (midnight local time).
- Do you store any dates I enter?
No. Everything runs locally in your browser. Inputs are not stored or transmitted.
- What date formats are supported?
Use the date picker (YYYY-MM-DD). It avoids ambiguity across regions.
- Can I calculate for past or future dates?
Yes. Any valid date supported by your browser can be used.