Date et Heure
Instantané, privé et gratuit
Calculatrice du Jour de la Semaine.
Découvrez quel jour de la semaine tombe n'importe quelle date — passée, présente ou future — dans votre propre langue.
Saisissez vos valeurs
Les résultats se mettent à jour pendant la saisie.
Comment utiliser
FAQ
What day of the week was I born on?
Enter your date of birth into the date field and the calculator shows the weekday immediately, along with the ISO weekday number and whether it was a weekend.
What is the ISO weekday number?
ISO-8601 numbers weekdays Monday = 1 through Sunday = 7. JavaScript and many spreadsheets instead use Sunday = 0 through Saturday = 6. This calculator shows both so you can match whichever system your software uses.
Does the calculator work for dates before 1900?
Yes. It handles dates before 1970 and even years below 100 correctly. It uses the proleptic Gregorian calendar, so results match standard software date functions rather than the Julian calendar historically used before 1582.
Will the weekday name show in my language?
Yes. The weekday name is generated from your selected site language using the browser's internationalization support, so it appears in your own language and script rather than always in English.
Which dates count as the weekend?
This calculator labels Saturday and Sunday as the weekend, the most common convention. Some countries use Friday-Saturday or a different pairing, so adjust for your local working week.