13:45 it is a quarter to two.12:00 it is twelve o'clock.16:45 it is a quarter to five.17:30 it is half past five.12:55 it is five minutes to one.20:15 it is a quarter past eight.19:10 it is ten minutes past seven.20:25 it is twenty five minutes past eight.21:10 it is ten minutes past nine.