White-shift cabs are generally available from 4:00am to 4:00pm.
The night shift cab is usually 4-5pm to 4-5am the next morning, and you have to start working at nightfall.
Driving a night taxi, in addition to staying up late and easily fatigued driving, but also need to pay attention to safety issues, especially some accident-prone road, the gathering of undesirable and illegal people, etc., to identify each passenger, and early preparedness, just in case.
Relatively speaking, night shifts are more grueling than day shifts. And whether you run a day shift or a night shift also depends on your own situation.