Basically the title speaks for itself, I'm going to show you how you can start your campaigns at, say, 08:00 AM and stop them at 23:00 PM - all in a single rule. It requires two tasks and a custom schedule:

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So this rule would run twice a day at the times I defined in the custom schedule. When it runs at 8:00 AM it would check conditions in both tasks but only one of them will be met, the one in the start task, cause 8:00 AM is less than 9:00 AM. Hence the start task gets triggered at 8:00 AM and the pause task goes off at 11:00 PM.

Note: the timezone in conditions is usually defined automatically but if it doesn't match your ad account timezone you can always change it.

Rules like this are very popular among our customers so maybe you'll find use for it too. Try it yourself!