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.
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.
How it works
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
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you perform quick utility operations directly in your browser. It runs entirely in your browser without sending data to a server.
You can use this tool when handling simple tasks without installing additional software. The results should be interpreted as a processed output based on your input data.
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.