13:00
one o'clock

13:05
five past one

13:10
ten past one

13:15
quarter past ten

13:20
twenty past one

13:25
twenty-five past one

13:30
half past one

13:35
twenty-five to two

13:40
twenty to two

13:45
quarter to two

13:50
ten to two

13:55
five to two