10:03 - ten oh three / three past ten.
2:59 - two fifty-nine / one to three.
10:00 - ten o'clock.
15:25 - twenty-five past three.
3:06 - three oh six / six past three.
4:15 - a quarter past four.
8:45 - a quarter to nine.
11:55 - five to twelve.
16:20 - twenty past four.