German Numbers, Dates and Time: Master the Backwards Logic

Numbers are where German ambushes beginners twice: once with reversed two-digit numbers, and again with a clock system where halb acht is 7:30. Both become automatic with the right drills — here's the full map.

The backwards numbers

From 21 to 99, German says the ones digit first: einundzwanzig (one-and-twenty) = 21, vierundsechzig = 64. Written as one word, always. The traps:

• Hearing them: when someone dictates "vierundsechzig", learners write 46. Fix: always write the second-heard digit first. Drill with prices and phone numbers, not number lists.
• ein vs. eins: counting says eins, but inside numbers it's einund…, and before nouns it declines (ein Euro, eine Minute).
• Big numbers: no reversal above 99 — dreihundertvierundzwanzig = 324 (three hundred + four-and-twenty).

The clock: halb means half TO

Time	Colloquial German	Logic
7:30	halb acht	half of the way to 8
7:15	Viertel nach sieben	quarter past 7
7:45	Viertel vor acht	quarter to 8
7:25	fünf vor halb acht	5 before half-to-8 (yes, really)

Official contexts (train stations, TV) use the 24-hour clock plainly: neunzehn Uhr dreißig = 19:30. When in doubt, use that — it's always understood and unambiguous. Regional note: in parts of the south and east you'll hear Viertel acht (7:15) and drei viertel acht (7:45).

Dates and ordinals

• Format: day.month.year — 03.10.2026 is October 3rd, never March 10th.
• Spoken with ordinals + am: am dritten Oktober; the year plainly: zweitausendsechsundzwanzig.
• Ordinal rule: 1.–19. add -te (der zweite, der neunzehnte — irregular: erste, dritte, siebte), from 20. add -ste (der zwanzigste).

The phone-number survival drill

Germans often dictate numbers in pairs: 34 76 12 = vierunddreißig, sechsundsiebzig, zwölf. Three-minute daily drill: have any voice assistant or partner read 5 phone numbers and 5 prices; write, check, repeat. Two weeks of this beats any textbook chapter.

Numbers, times and dates run throughout our A1 and A2 courses — including listening exercises where you have to catch them at native speed.