13:10 - it's ten past one
15:20 - it's twenty past three
17:50 - it's ten to six
19:30 - it's half past seven
18:45 - it's a quarter to seven
16:15 - it's a quarter past four
13:10 - it's ten past one
15:20 - it's twenty past three
17:50 - it's ten to six
19:30 - it's half past seven
18:45 - it's a quarter to seven
16:15 - it's a quarter past four