Prepositions of Time - at, in, on

Prepositions of Time - at, in, on

We use:

  • at for a PRECISE TIME

  • in for MONTHS, YEARS, CENTURIES and LONG PERIODS

  • on for DAYS and DATES

 

at
PRECISE TIME

in
MONTHS, YEARS, CENTURIES and LONG PERIODS

on
DAYS and DATES

at 3 o'clock

in May

on Sunday

at 10.30am

in summer

on Tuesdays

at noon

in the summer

on 6 March

at dinnertime

in 1990

on 25 Dec. 2010

at bedtime

in the 1990s

on Christmas Day

at sunrise

in the next century

on Independence Day

at sunset

in the Ice Age

on my birthday

at the moment

in the past/future

on New Year's Eve



Look at these examples:

  • I have a meeting at 9am.

  • The shop closes at midnight.

  • Jane went home at lunchtime.

  • In England, it often snows in December.

  • Do you think we will go to Jupiter in the future?

  • There should be a lot of progress in the next century.

  • Do you work on Mondays?

  • Her birthday is on 20 November.

  • Where will you be on New Year's Day?



Notice the use of the preposition of time at in the following standard expressions:

Expression

Example

at night

The stars shine at night.

at the weekend*

I don't usually work at the weekend.

at Christmas*/Easter

I stay with my family at Christmas.

at the same time

We finished the test at the same time.

at present

He's not home at present. Try later.



*Note that in some varieties of English people say "on the weekend" and "on Christmas".

Notice the use of the prepositions of time in and on in these common expressions:

in

on

in the morning

on Tuesday morning

in the mornings

on Saturday mornings

in the afternoon(s)

on Sunday afternoon(s)

in the evening(s)

on Monday evening(s)



When we say last, next, every, this we do not also use at, in, on.

  • I went to London last June. (not in last June)

  • He's coming back next Tuesday. (not on next Tuesday)

  • I go home every Easter. (not at every Easter)

  • We'll call you this evening. (not in this evening)

 


Mini Quiz

Test your understanding with this quick quiz.

1. Choose the correct prepositions: "Let's meet _______ midday _______ Saturday."

 at, at
 in, on
 at, on

2. Choose the correct prepositions: "The manager isn't here _______ present, but she'll be back _______ half an hour."

 at, in
 at, at
 in, in

3. Which are correct? "You won't be working _______ Saturday nights _______ the future, will you?"

 at, in
 on, in
 on, at

4. Which are correct? "I'm busy _______ moment, but I'll be free ______ evening."

 at the, in this
 in the, at this
 at the, this



https://english-grammarblog.blogspot.com/2022/03/all-about-completing-sentences.html
https://english-grammarblog.blogspot.com/2020/12/rules-of-changing-voice-active-to-passive.html
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