PREPOSITIONS (TIME)

AT,IN,ON,FROM....TO.

at.. + a specifc time on the clock
at..+night

in..+specific month,year,the morning,afternoon,evering

on..+a specific day of the week,date.

from.. to from(specific time)to (specific time)

example:

1. we have class at two o`clock.
2. my brithday is in october
3. i have class on monday