Dialogue: Telling Time and Scheduling

Almost nothing exposes an English speaker's assumptions faster than trying to arrange a meeting in Czech. Three short lines about when to meet hide a system that runs on ordinal numbers, counts toward the coming hour rather than the one just past, and vocalises its prepositions to keep the mouth comfortable. Get "half three" wrong and you'll show up an hour early for the rest of your life. We'll read a scheduling exchange line by line and pull out every clock construction in it.

The text

— V kolik hodin se sejdeme? V deset, nebo radši ve dvě? — Sejdeme se v půl třetí.

"What time shall we meet? At ten, or better at two? — Let's meet at half past two." Two people pinning down a time — and in the process using the time question, two clock times, a vocalised preposition, and the notorious půl třetí.

Word by word

Grammar in action 1: V kolik hodin? — the time question

The standard way to ask a clock time is V kolik hodin? — literally "At how many hours?" Two things trip up English speakers here. First, the preposition v ("at") is part of the question, mirroring the answer v deset ("at ten"); you don't ask a bare "how many hours" the way English asks a bare "what time." Second, kolik ("how many") forces the counted noun into the genitive plural, so hodina ("hour") becomes hodin — the same genitive-plural rule that follows every quantifier and every number from five up.

There's also a shorter, very common variant that drops hodin entirely: V kolik se sejdeme? In everyday speech this is if anything more frequent than the full form.

Grammar in action 2: v deset — clock time takes the accusative

To say "at [a time]," Czech uses v plus the number in the accusative case. For the plain cardinal numbers this is almost invisible, because deset ("ten") and most numbers look identical in the nominative and accusative — v deset, v sedm, v jedenáct all just stack the preposition onto the bare number. The accusative only becomes visible with numbers that actually inflect, which is exactly what the next section is about.

The full clock-time system — quarters, minutes past and to the hour, the 24-hour railway style — lives on telling the time with ordinals, and the broader "at / in / on" time frame is on time expressions with prepositions.

Grammar in action 3: ve dvě — the vocalised preposition and the feminine "two"

Now two small features collide in two syllables. First, dvě is the special feminine/neuter form of "two" used with hodina (a feminine noun), as opposed to masculine dva — so "two o'clock" is dvě (hodiny), never dva. Second, the preposition v cannot comfortably sit in front of the consonant cluster dv-, so it vocalises to ve: ve dvě, not v dvě. The extra -e is purely to make the phrase pronounceable, and the same thing happens before other awkward clusters — ve tři? no, but ve dvě, ve středu (on Wednesday), ve škole (at school).

When v vocalises and when it doesn't is a small system in its own right; it's laid out on vocalized preposition forms. The feminine numeral dvě itself belongs to the low numbers on the numbers zero to four.

Grammar in action 4: v půl třetí — why "half three" is 2:30

This is the single most counter-intuitive piece of Czech time-telling for an English speaker, and it's worth slowing right down. Půl třetí does not mean "half past three." It means half past two — 2:30.

The logic is that Czech counts the half-hour toward the hour that is coming, not the one that has passed. Třetí is the ordinal "third," in the feminine genitive form, and hodina ("hour") is understood: the phrase is literally "half of the third hour." You are halfway through the third hour of the clock — and the third hour runs from 2:00 to 3:00 — so you are at 2:30. German does exactly the same thing (halb drei = 2:30); English is the odd one out by naming the hour just past.

Notice that the ordinal after půl is always in the feminine genitive (druhé, třetí, čtvrté, páté), agreeing with the silent hodiny. And when you want to say at half past, you add v: v půl třetí.

The ordinals that make all this run — their formation and their case endings — are on ordinal formation and declension.

Grammar in action 5: sejdeme se — the reciprocal se and the perfective future

The verb driving the whole exchange is sejít se ("to meet up, to get together"), and it carries a reflexive se that here is reciprocal: the se means the parties meet each other. You can't drop it — sejdeme without se would be an incomplete, wrong-sounding verb for this meaning.

Sejít se is perfective, so — like every perfective verb — it has no separate future tense; its present-tense conjugation already points to the future. That's why sejdeme se ("we'll meet up") needs no budu auxiliary: the single, bounded event of meeting can only be read as forthcoming.

The reciprocal use of se is treated on the reciprocal se. Note the everyday alternative potkat se ("to run into / meet"), and the imperfective scházet se for habitual meetings (Scházíme se každý týden — "We meet every week").

Common Mistakes

Key Takeaways

• Ask the time with V kolik hodin? — the v is in the question too, and kolik forces the genitive plural hodin.
• Clock times take v + the number in the accusative: v deset, v sedm, ve dvě.
• Before dv- the preposition vocalises: ve dvě, not v dvě. And "two o'clock" is the feminine dvě, not dva.
• Půl + ordinal = half an hour before that ordinal hour: v půl třetí is 2:30, because Czech counts toward the coming hour.
• Sejdeme se is the perfective future of sejít se; the reciprocal se ("each other") is obligatory.