Prepositions of Time

Reference

Common mistakes

1. I will see you in Monday. → I will see you on Monday.
   on + day name
2. See you in Monday morning. → See you on Monday morning.
   day + part of the day → on
3. I sleep in the night. → I sleep at night.
   at night (exception)
4. My birthday is in 25th April. → My birthday is on 25th April.
   on + specific date

Prepositions of Time — Exercises

at, on or in?

1. I wake up _____ 7am. (at / on / in)
2. My birthday is _____ March. (in / at / on)
3. We have English class _____ Monday. (on / at / in)
4. She goes to the gym _____ the morning. (in / at / on)
5. They got married _____ 2019. (in / at / on)
6. I don't work _____ the weekend. (at / in / on)
7. The concert is _____ 15 June. (on / in / at)
8. It's cold _____ winter. (in / at / on)
9. I always feel tired _____ night. (at / in / on)
10. We visit my grandparents _____ Christmas. (at / in / on)

Fill in at, on or in

1. She was born _____ 1990. 
2. The shop opens _____ 9am. 
3. My exam is _____ Friday. 
4. I love going to the beach _____ summer. 

Prepositions of Time — Answer Key

at, on or in?

1. at — Exact clock times → at 7am.
2. in — Months → in March.
3. on — Days of the week → on Monday.
4. in — Parts of the day → in the morning.
5. in — Years → in 2019.
6. at — British English: at the weekend.
7. on — Specific dates → on 15 June.
8. in — Seasons → in winter.
9. at — at night — fixed expression.
10. at — at Christmas — fixed expression for holidays.

Fill in at, on or in

1. in
2. at
3. on
4. in