Prepositions in, on, at
Rule of thumb: "at" for exact points (times, addresses), "on" for days and surfaces, "in" for longer periods and enclosed or large spaces.
About: Prepositions in, on, at
Rule of thumb: "at" for exact points (times, addresses), "on" for days and surfaces, "in" for longer periods and enclosed or large spaces.
Worked examples
The meeting is ___ Monday.
Answer: on. Days and dates take "on".
I was born ___ 1995.
Answer: in. Years, months and seasons take "in".
See you ___ 7 p.m.
Answer: at. Exact times take "at".