Telling the time on the hour in Russian looks deceptively small, but it quietly drills one of the most important habits in the language: numerals govern the case of the noun that follows them. The word for "o'clock" is just час ("hour"), and it changes shape depending on the number — час (1:00), два часа́ (2:00), пять часо́в (5:00) — for exactly the same reason that два до́ма but пять домо́в. Learn the clock and you have rehearsed the whole numeral-government rule on a single, high-frequency word. This page covers asking the time, saying whole hours, saying at a time, and adding the AM/PM-style day-parts. Halves and quarters come later.
Asking the time
Two questions, both completely standard. Кото́рый час? is the textbook-classic; Ско́лько вре́мени? is what people more often actually say in conversation (informal, but extremely common).
— Кото́рый час? — Три часа́.
'What time is it?' 'Three o'clock.'
Извини́те, вы не ска́жете, ско́лько вре́мени?
Excuse me, could you tell me what time it is? (the polite street version)
The whole hour — and why час changes shape
To say a whole hour you give the number plus час in the form the number demands. This is the numeral-government rule (full treatment on the numeral government rule) applied to one noun. The pattern splits the numbers into three groups:
| Number | Form of "hour" | Case | Clock time |
|---|---|---|---|
| 1 (оди́н) | час | nominative singular | 1:00 — час |
| 2, 3, 4 | часа́ | genitive singular | 2:00 — два часа́ |
| 5–20 | часо́в | genitive plural | 5:00 — пять часо́в |
The logic is the standard one. After 2, 3, 4 the noun takes the genitive singular (часа́) — a frozen remnant of the old "dual" number Russian once had for pairs. After 5 and up the noun takes the genitive plural (часо́в). And 1 behaves like an adjective: it agrees as a nominative singular, so you say simply час (not "оди́н час" when telling the clock — the bare час is normal). Notice the stress moves: ча́с (one syllable, no mark) → часа́ → часо́в.
Сейча́с ро́вно час.
It's exactly one o'clock. (1:00 — bare час, nominative)
Уже́ четы́ре часа́, а он ещё спит.
It's already four o'clock and he's still asleep. (4:00 — часа́, genitive singular after 4)
По́езд прихо́дит в семь, а сейча́с то́лько шесть часо́в.
The train arrives at seven, and it's only six o'clock now. (6:00 — часо́в, genitive plural after 6)
Compound numbers follow their last digit
For hours past twelve in 24-hour speech (timetables, the army, official announcements), the form of час is decided by the final digit of the number. So двена́дцать часо́в (12:00) but два́дцать два часа́ (22:00), because the number ends in 2.
Магази́н закрыва́ется в два́дцать два часа́.
The shop closes at 22:00 (10 PM). (ends in 2 → часа́; this 24-hour phrasing is the formal/official register)
Рейс в два́дцать оди́н час со́рок мину́т.
The flight is at 21:40. (ends in 1 → час; formal timetable register)
Saying "at" a time — в + accusative
To say something happens at a given hour, use в plus the time. With час the accusative happens to look identical to the nominative/genitive forms you already have, so practically nothing changes in the words — but the в is obligatory.
Дава́й встре́тимся в два часа́.
Let's meet at two o'clock. (в + два часа́ — 'at')
Уро́к начина́ется в во́семь часо́в.
The lesson starts at eight o'clock. (в + во́семь часо́в)
Я позвоню́ тебе́ в час.
I'll call you at one o'clock. (в час — note the в is needed even though 'час' doesn't change)
AM and PM — the genitive day-parts
Russian has no AM/PM. Instead it pins the hour to a part of the day, and that part-of-day word goes in the genitive — literally "two of the afternoon," "seven of the morning." There are four:
| Day-part (genitive) | From (nominative) | Rough range | English |
|---|---|---|---|
| утра́ | у́тро | ≈ 4 AM – 11 AM | in the morning (AM) |
| дня | день | ≈ 12 PM – 5 PM | in the afternoon (PM) |
| ве́чера | ве́чер | ≈ 5 PM – 11 PM | in the evening (PM) |
| но́чи | ночь | ≈ 12 AM – 4 AM | at night (AM, late) |
The day-part comes after the hour: семь часо́в утра́ (7 AM, "seven of the morning"), два часа́ дня (2 PM, "two of the afternoon"). The ranges are approximate and feel-based, not legal — Russians split the 12-hour clock by what they're doing (sleeping = но́чи, working = дня), so eleven at night is оди́ннадцать часо́в ве́чера, while two in the morning is два часа́ но́чи.
Я встаю́ в семь часо́в утра́.
I get up at seven in the morning. (7 AM — утра́, genitive of у́тро)
Обе́д у нас в два часа́ дня.
We have lunch at two in the afternoon. (2 PM — дня, genitive of день)
Конце́рт зако́нчился в оди́ннадцать часо́в ве́чера.
The concert finished at eleven in the evening. (11 PM — ве́чера, genitive of ве́чер)
Он верну́лся домо́й в три часа́ но́чи.
He got home at three in the morning. (3 AM — но́чи, genitive of ночь — late-night hours take но́чи, not утра́)
In casual speech the word часо́в / часа́ is very often dropped once the day-part makes things clear: в семь утра́ (at seven AM), в два дня (at two PM). Both the full and the short versions are everyday and correct.
Дава́й созвони́мся за́втра в де́вять утра́.
Let's give each other a call tomorrow at nine in the morning. (informal short form: часо́в dropped)
Common Mistakes
❌ два час
Incorrect — after 2 the noun is genitive singular: часа́. The bare nominative час only goes with 1.
✅ два часа́
two o'clock (2:00) — часа́ (genitive singular after 2, 3, 4)
❌ пять часа́
Incorrect — after 5 the noun is genitive plural: часо́в, not the genitive singular часа́.
✅ пять часо́в
five o'clock (5:00) — часо́в (genitive plural after 5 and up)
❌ Встре́тимся два часа́.
Incorrect for 'at two' — without в this means 'let's meet for two hours.' To say AT a time you need в.
✅ Встре́тимся в два часа́.
Let's meet at two o'clock. (в + accusative = 'at')
❌ в семь часо́в у́тро
Incorrect — the day-part is genitive, not nominative: у́тро → утра́. Literally 'seven of the morning.'
✅ в семь часо́в утра́
at seven in the morning (7 AM) — genitive утра́
❌ в три часа́ утра́ (for 3 AM)
Misleading — 3 AM is the dead of night, so Russian uses но́чи, not утра́. Утра́ starts feeling right around 4–5 AM.
✅ в три часа́ но́чи
at three in the morning (3 AM) — the late-night hours take но́чи
Key Takeaways
- "O'clock" is just час, and it follows the numeral-government rule: час after 1 (1:00), часа́ after 2/3/4 (два часа́), часо́в after 5+ (пять часо́в). Compound numbers go by their last digit.
- Whole-hour time is the cleanest place to drill the 1 / 2–4 / 5+ case split that governs every noun after a number.
- Say at a time with в + accusative: в два часа́, в пять часо́в. Never drop the в.
- Russian has no AM/PM — it adds a genitive day-part after the hour: утра́ (AM), дня (afternoon), ве́чера (evening), но́чи (late night). Late-night hours take но́чи, not утра́.
- In speech часо́в / часа́ is often dropped once the day-part is there: в семь утра́, в два дня.
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- The Numeral Government Rule in DepthA2 — The single most important rule in Russian numbers, stated definitively for the nominative/accusative: a number ending in 1 (except 11) puts the noun in the NOMINATIVE SINGULAR (два́дцать оди́н дом); ending in 2, 3, 4 (except 12–14) → GENITIVE SINGULAR (два до́ма, три рубля́); ending in 0, 5–9, or being 11–14 → GENITIVE PLURAL (пять домо́в, двена́дцать книг). Plus where the rule comes from (the genitive singular is a fossilized dual), how adjectives agree inside a numeral phrase (два больши́х до́ма), and how compounds key on the final word (сто оди́н дом).
- Numbers 0-10A1 — The first ten Russian cardinals — ноль/нуль, оди́н, два/две, три, четы́ре, пять, шесть, семь, во́семь, де́вять, де́сять — with their stress and a first look at the rule that makes them so different from English: оди́н agrees like an adjective (оди́н стол, одна́ кни́га, одно́ окно́); два/две (the only cardinal that changes for gender), три and четы́ре put the counted noun in the GENITIVE SINGULAR (два стола́, три кни́ги); and пять through де́сять put it in the GENITIVE PLURAL (пять столо́в, де́сять книг).
- Genitive in Dates and TimeB1 — Saying something happens 'on the Nth' puts BOTH the ordinal and the month in the genitive: пе́рвого ма́я, два́дцать пя́того декабря́. Contrast naming a date (Сего́дня пе́рвое ма́я — nominative) with an event on it (Я прие́хал пе́рвого ма́я — genitive). The genitive also follows time prepositions с / от / до / по́сле / о́коло / во вре́мя (с утра́ до ве́чера, по́сле обе́да, о́коло ча́са) and marks the year in a full date (…две ты́сячи двадца́того го́да).
- Accusative in Time and DurationA2 — Beyond the direct object, the accusative runs Russian's time system. The bare accusative gives duration (Я ждал час 'I waited an hour'); в + accusative gives days and clock times (в понеде́льник, в три часа́); за + accusative means 'within / in' a span (сде́лал за час 'did it in an hour'); на + accusative means 'for' a planned span (на неде́лю 'for a week'). The classic hurdle is keeping час (spent it), за час (in an hour), and на час (for an hour ahead) apart.
- Genitive After Quantity WordsA2 — мно́го, ма́ло, немно́го, не́сколько, ско́лько, сто́лько, бо́льше, ме́ньше all govern the genitive: genitive PLURAL for things you can count (мно́го книг, ско́лько люде́й) and genitive SINGULAR for mass/abstract nouns (мно́го воды́, ма́ло вре́мени). Measures behave the same (килогра́мм я́блок, буты́лка вина́, ча́шка ко́фе). The count/mass split — invisible in English's much/many — decides singular vs plural.