O'clock is a way of telling the exact hour on a clock. We say "o'clock" when the minute hand (the long hand) points to the number 12 on the clock. When the minute hand points straight up to 12 ...
So the hour hand was sitting down at six o’clock.” The city didn’t say what went wrong with the clock on the south face. But Myles-Scott said all four clock faces run off a master control box.