At, on and in (time) | tomorrow afternoon preposition
Weuseat:I’llseeyouatfiveo’clock.Thehelicoptertookoffatmiddayandheadedfortheisland.Whatareyoudoingattheweekend?AttheNewYear,millionsofpeopletravelhometobewiththeirfamilies(butwesayonyourbirthday).Wedon’tuseatwiththequestionWhattime…?ininformalsituations:Whattimeareyouleaving?(preferredtoAtwhattimeareyouleaving?)Weuseon:Wemovedintothishouseon25October1987.I’vegottogotoLondononFriday.TheofficeisclosedonFridays.(everyFriday)Ininformalsituations,weoftenleaveoutonbeforepluraldays:DoyouworkSaturday...
We use at:
I’ll see you at five o’clock.
The helicopter took off at midday and headed for the island.
What are you doing at the weekend?
At the New Year, millions of people travel home to be with their families (but we say on your birthday).
We don’t use at with the question What time …? in informal situations:
What time are you leaving? (preferred to At what time are you leaving?)
We use on:
We moved into this house on 25 October 1987.
I’ve got to go to London on Friday.
The office is closed on Fridays. (every Friday) In informal situations, we often leave out on before plural days:
Do you work Saturdays?
What do you normally do on your birthday?
We use in:
I’ll come and see you in the morning for a cup of c...