Explanations » A1 Grammar Explanations » At, in, on – prepositions of time

At, in, on – prepositions of time

Detailed grammar chart explaining the use of time prepositions 'at', 'in', and 'on' with examples for days, months, seasons, years, and specific times of day.

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Use at with times of day, including mealtimes, bedtime, etc.

  • at 3 o’clock, at 10.30 am, at noon, at dinnertime, at bedtime, at sunrise, at sunset, at the moment

Use at in the following common expressions:

  • 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/at the moment: He’s not home at present. Try later.


Use in with months, seasons, years, decades, centuries and long periods of time in general.

  • in May, in the summer, in 1990, in the 1990s, in the 20th century, in the Ice Age, in the past/future


Use on followed by days and dates.

  • on Sunday, on Tuesday mornings, on 6 March, on 25 December 2010, on Christmas Day, on Independence Day, on my birthday, on New Year’s Eve

Parts of the day:

  • in the morning
  • in the afternoon
  • in the evening
  • at night

Last, next, every and this

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

  • I went to London last June. blank
  • I went to London in last June. blank
  • He’s coming back next Tuesday. blank
  • He’s coming back on next Tuesday. blank
  • I go home every Easter. blank
  • I go home at every Easter. blank
  • We’ll call you this evening. blank
  • We’ll call you in this evening. blank