08
Prepositions of Time
In January, on Monday, at 3 o'clock.
Visual Explanation
Time preposition + time expression
in / on / at+time expression
Examples
The meeting is at half past ten.
Her birthday is on the 9th of July.
We usually go on holiday in August.
When to Use
- at
- Use with clock times and fixed points: at 3 o'clock, at noon, at midnight, at the weekend.
- on
- Use with days and dates: on Monday, on 25th December, on my birthday.
- in
- Use with months, seasons, years, and longer periods: in March, in winter, in 2024, in the morning.
Tip
Say 'at night' but 'in the morning / afternoon / evening.' This is an exception — there is no rule, just memorise it.