Weekday finder
Type any calendar date and get its weekday spelled out in the page language. Example: 2025-01-01 is a Wednesday and 2000-01-01 a Saturday.
What to know
The weekday page has one input, a single date, and one output, the full weekday name. Unlike the other modes it needs no end date, no day count and no reference to today.
The name is produced with the browser internationalisation API in the language of the page, so the same date reads Wednesday in English, 수요일 in Korean, 水曜日 in Japanese, 星期三 in Chinese and miércoles in Spanish. The weekday is read from the UTC calendar date, which keeps it stable across time zones.
Known anchors help you check the result: 2025-01-01 is a Wednesday, 2000-01-01 is a Saturday and 1988-05-05 is a Thursday. Dates in the distant past and future work too, using the proleptic Gregorian calendar that the browser applies uniformly.
Typical jobs are checking which weekday a birthday, a deadline or a historical event fell on, and finding out whether a planned date lands on a weekend before you send an invitation.
It also helps with planning around the Monday-to-Sunday cycle: a date that returns Saturday or Sunday needs a weekday alternative for a meeting, while a Friday deadline may call for earlier delivery. The page names the day but leaves the working-day logic to you.
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How to use Weekday finder
- Pick Start date 2025-01-01 in the date field.
- Read the Result line, which shows Wednesday.
- Change the date to 2000-01-01 and the result becomes Saturday.
- Switch the page language to compare the same weekday in another tongue.
Quick answers
What weekday was 1988-05-05?
It was a Thursday. You can verify any birth date the same way, from the page in your own language.
Does it tell me whether a date is a public holiday?
No. It names the weekday only and contains no holiday calendar for any country.
Why does the result change language with the page?
The weekday name comes from the browser locale matching the page language, so only the label differs and the underlying day stays the same.
Are very old dates reliable?
The Gregorian rules are extended backwards without change, which differs from the Julian dates used in many countries before their calendar reforms.