Date Weekday 計算機
「Date Weekday 計算機」はコード、データと QRに使えるブラウザツールです。入力内容と結果は通常この端末内で処理され、登録は必要ありません。
使い方
使い方
- 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.
よくある質問
あわせて知りたいこと
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.