1. in the evening
2. on Monday morning
3. at night
4. at five o'clock
5. on St Valentine's Day
6. in March
7. in 2014
8. in the afternoon
9. on holiday
10. at 12.30 a.m
11. at Easter
12. on 16 September
13. on Saturday night
14. on a hot day
15. at half past three
16. on New Year's Eve
17. at the end of the week
18. in 1988
19. at a quarter to six
20. at the weekend (в американском английском часто on the weekend)
