We tell time by looking at the hands of a clock. At the hour, the long hand (minute hand) points to 12. The short hand points to the hour. At half past, the long hand will point to the six and the short hand will point to just after the hour.
The time is 6 o'clock (or 06:00).
This clock shows half past 6 (or 06:30).
This clock shows 2 o'clock (or 02:00).
The time is half past 11 (or 11:30).