Telling the Time | Czech Grammar

Telling the time in Czech is mostly two skills welded together: the ordinary 2–4 versus 5+ counting agreement you already know from counting anything, and a famously head-spinning half-and-quarter system that counts toward the next hour. Get past those two hurdles — jsou dvě hodiny versus je pět hodin, and půl třetí meaning 2:30 rather than 3:30 — and the rest is just vocabulary. There is also a clean, agreement-free digital style (dvě třicet) that you can always fall back on.

Full hours: the counting agreement strikes again

The word for "o'clock" is hodina ("hour"), and it follows the exact same rule as counting any noun: one takes the singular, two–four take the nominative plural, five and up take the genitive plural. The verb být agrees too.

Time	Czech	Why
1:00	Je jedna hodina.	1 → singular noun, singular verb
2:00 / 3:00 / 4:00	Jsou dvě / tři / čtyři hodiny.	2–4 → nominative plural, plural verb
5:00 … 12:00	Je pět / … / dvanáct hodin.	5+ → genitive plural, singular verb

Kolik je hodin? — Je jedna hodina.

What time is it? — It's one o'clock. (jedna hodina — singular)

Už jsou tři hodiny, měli bychom jít.

It's already three o'clock, we should get going. (jsou tři hodiny — plural)

Je pět hodin a venku se pomalu stmívá.

It's five o'clock and it's slowly getting dark outside. (pět hodin — genitive plural, singular je)

Notice that "one" and "two" here are feminine — jedna, dvě — because they agree with the feminine noun hodina. (That gender split is the topic of the dva vs dvě page; for the 5+ genitive logic see five and up takes the genitive.)

Half past: půl counts to the coming hour

Here is the conceptual leap. Czech does not look back to the hour just gone ("half past two"); it looks forward and names the hour being filled. 2:30 is the half-way point of the third hour, so it is půl třetí — literally "half of the third." The number after půl is a feminine ordinal in the genitive (agreeing with an unspoken hodiny).

Clock	Czech	Literally
12:30	půl jedné	half of the first
1:30	půl druhé	half of the second
2:30	půl třetí	half of the third
3:30	půl čtvrté	half of the fourth
6:30	půl sedmé	half of the seventh

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The trap in one line: půl třetí is 2:30, not 3:30. Czech tells the time by how much of the upcoming hour has already passed. "Half of the third hour is done" → it's 2:30.

Je půl třetí, dáme si zatím kávu?

It's half past two — shall we have a coffee in the meantime? (půl třetí = 2:30)

Sejdeme se v půl sedmé před kinem.

Let's meet at half past six in front of the cinema. (v půl sedmé = at 6:30)

Quarters: čtvrt na and tři čtvrtě na

The same forward logic runs the quarters, but with a different grammar: čtvrt na ("a quarter onto") and tři čtvrtě na ("three quarters onto") plus the accusative of the coming hour (a plain cardinal, not an ordinal). So both quarters point at the same hour the half does.

Clock	Czech	Literally
2:15	čtvrt na tři	a quarter onto three
2:30	půl třetí	half of the third
2:45	tři čtvrtě na tři	three quarters onto three
12:15	čtvrt na jednu	a quarter onto one

So all three of čtvrt na tři, půl třetí, tři čtvrtě na tři circle the hour three — they are 2:15, 2:30 and 2:45. The one inconsistency to swallow: the quarters take na + accusative (na tři), but the half takes a bare ordinal genitive (třetí). There is no logic to recover here — it is simply how the two expressions are built, and you memorise them as set frames.

Začíná to čtvrt na osm, tak ať nejdeme pozdě.

It starts at 7:15, so let's not be late. (čtvrt na osm = 7:15)

Bylo už tři čtvrtě na dvanáct, když konečně dorazil.

It was already 11:45 by the time he finally turned up. (tři čtvrtě na dvanáct = 11:45)

The digital style: dvě třicet

In transport, broadcasting, and any formal or written setting, Czech uses a flat, agreement-free 24-hour style: just read the two numbers. 14:30 is čtrnáct třicet, 18:42 is osmnáct čtyřicet dva. No hodin, no půl, no forward counting. This is the safe register if the půl/čtvrt system has you tangled — you will always be understood.

Vlak odjíždí ve čtrnáct třicet z druhého nástupiště.

The train leaves at 14:30 from platform two. (digital 24-hour style)

Schůzka je naplánovaná na deset hodin.

The meeting is scheduled for ten o'clock. (na + accusative for scheduling)

"At what time?" — v / ve + accusative

To say at a time, ask V kolik hodin? ("at what time?") and answer with v / ve + accusative. The hour goes into the accusative, which for these numbers mostly looks like the nominative — except feminine jedna → jednu. The preposition vocalizes to ve before clusters: ve dvě, ve tři, ve čtyři, ve dvanáct.

Time	"At …"
at 1:00	v jednu (hodinu)
at 2:00 / 3:00 / 4:00	ve dvě / ve tři / ve čtyři
at 5:00–11:00	v pět … v jedenáct
at 12:00	ve dvanáct (v poledne = at noon)
at 2:30	v půl třetí

V kolik hodin ti to začíná? — Ve dvě.

What time does it start for you? — At two. (ve dvě — vocalized before dv-)

Obchod otevírá v devět a zavírá v šest.

The shop opens at nine and closes at six. (v devět, v šest)

Přišel jako vždycky za pět minut dvanáct.

He showed up, as always, at the very last minute. (za pět minut dvanáct — literally 'five minutes to twelve', also an idiom)

That last example shows the everyday "to the hour" frame: za + accusative minutes + the coming hour — za pět minut dvanáct is "five to twelve."

Common mistakes

❌ Je dvě hodiny.

Incorrect — 2/3/4 take the plural verb and nominative plural noun.

✅ Jsou dvě hodiny.

Correct: it's two o'clock.

❌ Je pět hodiny.

Incorrect — five and up takes the genitive plural hodin.

✅ Je pět hodin.

Correct: it's five o'clock.

❌ Sejdeme se v půl tři.

Incorrect — půl takes a feminine ordinal in the genitive, not a cardinal.

✅ Sejdeme se v půl třetí.

Correct: let's meet at half past two (2:30).

❌ Je půl třetí. (myšleno 3:30)

Incorrect if you mean 3:30 — půl třetí is 2:30; 3:30 is půl čtvrté.

✅ Je půl čtvrté.

Correct for 3:30: 'half of the fourth'.

❌ Začíná to v dvě hodiny.

Incorrect — the preposition vocalizes before the cluster dv-.

✅ Začíná to ve dvě hodiny.

Correct: it starts at two o'clock.

Key takeaways

Full hours follow normal counting agreement: jedna hodina (1), dvě/tři/čtyři hodiny (2–4, plural), pět hodin (5+, genitive plural).
půl + feminine ordinal genitive counts to the next hour: půl třetí = 2:30.
Quarters use na + accusative: čtvrt na tři = 2:15, tři čtvrtě na tři = 2:45.
The digital 24-hour style (čtrnáct třicet) is always available and needs no agreement.
"At a time" = v / ve + accusative: ve dvě, v půl třetí, v poledne.

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