Time before an event (за ... до)

To state that something happens a certain amount of time before an event, Russian uses the construction за ... до.

before (in 'за ... до ...')
за ... до

The Formula

The phrase requires two cases:

  • за
    • amount of time (Accusative)
  • до
    • event (Genitive)
I always arrive half an hour before the departure.
Я всегда приезжаю за полчаса до вылета.

Since the amount of time is in the Accusative case, masculine inanimate nouns like день (day) or час (hour) match their dictionary forms.

I woke up an hour before the meeting.
Я проснулся за час до встречи.

Feminine nouns like минута (minute) or неделя (week) take standard Accusative endings ( to , to ).

It is necessary to warn the clients a week before the premiere.
Нужно предупредить клиентов за неделю до премьеры.
The teacher started the lesson a minute before the bell.
Учитель начал урок за минуту до звонка.

Expressing Approximate Time

To express an approximate amount of time, swap the order of the number and the noun, placing the time noun before за.

For example, за два часа means "two hours before," but часа за два means "about two hours before."

We arrived about two hours before the flight departure.
Мы приехали часа за два до вылета.

More Examples