I have found the following usage of "on", "at" and "in" on the internet. Is there any other exception and/or rule for that?
Prepositions of Time
Use in for
- Months: in April / in September / in that month
- Seasons: in (the) summer / in (the) winter
- Years: in 1332 / in 1984 / in that year / in the next year
- Long Period(s) of Time: in former century / in 90's / in the Ice Age / in the past / in the future
Exceptions: in the morning / in the evening
Use at for
- Time: at 8 o'clock / at 9:30 / at bedtime / at sunset / at dinnertime / at 5:33:10 AM
Exceptions: at Christmas (= during the Christmas holidays but not necessarily on December 25th) / at Easter / at noon / at night / at the weekend / at the present time / at the moment
Use on for
- Days: on Monday / on Friday / on Christmas Day (= on December 25th) / on Easter Sunday / on Independence Day
- Dates: on February 18th / on her birthday / on 21 March 2015 / on
- We have in the morning and on Monday but we say on Monday morning, not in Monday morning, and so on.
- When we say last, next, every, this we do not also use at, in, on: She runs next Tuesday. (not on next Tuesday) / He leaves us every Easter. (not at every Easter) / I See you this evening. (not in this evening)
- Look at these examples for the combination of times in a sentence: We will meet next week at six o’clock on Monday. / I heard a funny noise at about eleven o’clock last night. / It happened last week at seven o’clock on Monday night.
Look at this answer as well which says:
This all hints at a coherent metaphor: hours and other short periods of time are places; days are surfaces; months and longer time periods are containers.