In case you were wondering

When you need to find out the time, ask: Который (сейчас) час?

You'll hear in reply:

Сейчас час.It's one o'clock.
Сейчас два часа.It's two o'clock.
Сейчас десять часов.It's ten o'clock.

When you need to know WHEN? you may use one of the following two

questions: Когда? and В котором часу?

There are two ways of answering these questions:

  1. Когда? This is less specific and may be answered by saying:

    Утром.In the morning (from about 5:00 am to noon)
    Днём.In the daytime (from noon to about 6:00 pm)
    Вечером.In the evening (from 6:00 pm to midnight)
    Ночью.At night (from midnight to about 5:00 am)
  2. В котором часу? This is more specific and indicates the hour:

    В час.At one o'clock.
    В два/три/четыре (часа).At two/three/four o'clock.
    В пять/шесть/семь (часов)At five/six/seven o'clock.

    В восемь /девять /десять (часов)

    В одиннадцать /двенадцать (часов)

    At eight /nine /ten

    At eleven /twelve o'clock.

То indicate am add ночи or утра after the hour:

For p_m, add дня or вечера.

То indicate partial hours, Russian uses a very complex system which is gradually being replaced by a simpler one based on the 24-hour clock. Study the following examples:

В час.At 1:00 am.
В четыре тридцать.At 4:30 am.
В девять сорок пять.At 9:45 am.
В тринадцать десять.At 1:10 pm. (13:10)
В семнадцать тридцать.At 5:30 pm. (17:30)
В двадцать пятнадцать.At 8:15 pm. (20:15)
В двадцать три тридцать.At 11:30 pm. (23:30)

But you will also hear these:

В половине пятого утра.At 4:30am. (lit. half five in the morning)
Без пятнадцати десять утра.At 9:45am. (lit. 10 less 15 [minutes])
В десять минут второго.At 1:10pm. (lit. 10 minutes of the second hour)
В половине шестого вечера.At 5:30pm. (lit. half six in the evening)

Russian uses the Genitive case and the unchanging negative verb forms НЕТ (present tense) HE БЫЛО (past tense) and HE БУДЕТ (future tense) to show that someone or something is lacking/missing.

Compare the following sentences:

Russian uses special forms of the numerals with the words:

and a few others which exist only in the plural.

одни сутки(but: один ребенок, один сын, одна дочь)
двое сутокдвое детей
трое сутоктрое детей
четверо сутокчетверо детей
пятеро сутокпятеро детей

Note that these numerals are ALWAYS followed by the noun in the GENITIVE PLURAL CASE.

Study the following examples: