8:10 it is ten minutes past eight.
8:15 it is a quarter past eight.
8:20 it is twenty minutes past eight.
20:30 it is half past 8 p.m.
20:45 it is a quarter to nine p.m.
8:10 - ten past eight
8:15 - quarter past eight
8:20 - twenty past eight
20:30 - half past ten
20:45 - quarter to eleven
