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Prepositions of Time

Overview | Prepositions of Movement | Prepositions of Place | Prepositions of Time
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Prepositions can also be used to show when something happened.

The prepositions at, on, and in

We use at for specific times.

For example:-
I start work at 7.00 a.m. 
I don't work at night.

We use on for specific days and dates .    

For example:
My birthday is on Monday.   
We're having a party on 7th September.   

We also use on for some special days.   

For example:
On Christmas day.

We use in for nonspecific times during a day, a month, a season, or a year.   

For example:
In summer it's too hot to work.   
I started this web site in 1999.
She woke up in the night.

More prepositions of time

Prepositions of Time

Examples

Point in Time
 
at
6 o'clock
midnight
the latest
on
Saturday
April 10th
Christmas Day
by
(indicates a deadline = at the latest)
the end of July
10 o'clock
tomorrow
till / until / up to
(indicates an end point)
March 10 o'clock tomorrow next week
since
(indicates a beginning point in time)
April
10th March
   
Length of Time
 
in
July
the autumn
the morning
the middle of …….
at
night
the weekend
during
the meeting
the lesson
for
two days
twelve months
throughout
August
the project
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