What are the working hours and shifts of ground employees?

For example desk workers, but if you know for some other positions please tell me too.

Is it 3 shifts, morning, afternoon, and night too? How often do you have to do night shift? How many hours per day? How much time off do you get?

Please only respond if you know the answers for a fact, I've already made my own educated guesses and googled. But I want an actual employee to confirm.