What are the 3 dials on a watch?

chronograph watch
A chronograph watch typically has three dials to register the time elapsed – a second dial (also referred to as a sub-second dial), a minute dial and an hour dial.

How do I set the small dials on my watch?

The first sub dial you should set is the calendar on the middle right. Pull the crown out 2 stops (as far as it will go) and turn the crown clockwise. Keep turning and for every 24 hours turned, the sub dial will move on 1 day. Keep turning until it reaches the correct date.