There are pendulum clocks and cuckoo clocks, ticking clocks and silent clocks. There are wrist watches and Pocket watches, lapel clocks and stopwatches.
There are clocks that ring solemn chimes, others that sound happily and others that wake you up at the time you want. But all the clocks, both pendulum and bracelet, they look alike.
All have hands and dial.
Hands and dial indicate time. Before watches with dial and hands, they used hourglasses, sundials water clocks and candle clocks.
How do clocks work?
How do they tell us what time it is?
keep reading and you know it.