9:15 — a quarter past nine. 16:00 — four o'clock. 10:45 — a quarter to eleven. 1:00 — one o'clock. 6:18 — eighteen minutes past six. 17:30 — half past five. 20:00 — eight o'clock. 8:16 — sixteen minutes past eight. 21:00 — nine o'clock. 12:00 — twelve o'clock.
16:00 — four o'clock.
10:45 — a quarter to eleven.
1:00 — one o'clock.
6:18 — eighteen minutes past six.
17:30 — half past five.
20:00 — eight o'clock.
8:16 — sixteen minutes past eight.
21:00 — nine o'clock.
12:00 — twelve o'clock.