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CalcWolf Everyday Life Wochentag-Rechner
Everyday Life

What Day Was It? Day of the Week Finder

Find out what day of the week any date falls on — past, present, or future. Works for any year.

📅 Updated April 2026 Formula verified 📖 4 min read 🆓 Free · No sign-up

Berechnung

Zellers Formel berechnet den Wochentag fuer jedes Datum im gregorianischen Kalender. Der 3. Oktober 1990 (Deutsche Wiedervereinigung) war ein Mittwoch. Der 9. November 1989 (Mauerfall) ein Donnerstag.

Trivia

Freitag der 13. kommt 1-3× pro Jahr vor. Der Kalender wiederholt sich alle 400 Jahre.

⚡ CalcWolf Insight

The day-of-week calculator is one of the most frequently used "curiosity" calculators — people check their birthday, historical events, and future holidays. Users often check multiple dates in one session, driving excellent time-on-page metrics.

Frequently asked questions
An welchem Tag bin ich geboren?
Datum eingeben und berechnen.
Im Kopf berechnen?
Doomsday-Methode von John Conway — lernbar in 30 Min.
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Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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