At ~ We use AT when talking about specific times (hour / minutes)
- I wake up at 6 o’clock every morning.
- School starts at 9am everyday.
- Maria starts work at 9pm.
- We went to the beach at 11am and left at 4pm.
Tip: Midnight, midday and noon is considered to be specific hour, so we also use at.
- The party started at midnight and didn’t finish until sunrise.
- I am meeting Joan at midday for lunch.
12am = midnight
12pm = midday/noon
We also use at when talking about a holiday that lasts over a period of two or more days.
- What do you normally eat at Christmas?
- Did you see Maria at Easter?
On ~ We use on when talking about specific days and dates.
- I am going sailing with Maria on Saturday.
- We won the lottery on May 5th, 2020.
- I have an English review class on the 16th of every month.
- I always eat too much turkey on Christmas Day.
In ~ We use in when talking about specific months, years, seasons, centuries and periods of time.
- My brother was born in 1927.
- In Victorian times, people wore really beautiful clothes.
- Apple was founded by Steve Jobs in the 20th century.
- We have to finish our homework in 20 minutes.
Tip: Sometimes you will hear at the weekend and other times on the weekend. These are both correct. At is used in British English, while on the weekend is used in United States.
- Where would you like to go on the weekend? (American English)
- Where would you like to go at the weekend? (British English)
Prepositions with Parts of the Day
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