I just work the days, we don't have a night shift on the weekend, but during the week there is someone in the shop from 5 am to midnight, sometimes earlier, sometime later. Many times someone is working throughout the night, too.
Of course, I'm also on call basically any time I'm not working unless I'm taking vacation time off.
That 3rd shift is a killer. We in school learned that when in a hospital this can be dangerous.
We went on a 3rd shift for 2 weeks, and found that the body goes with the cycle of the bio- cycle that effects all creatures on earth.
Not just the patients but us the care givers.
My daughter was in ICU and I went in to bath her body and brush her hair. A bad accident had taken place at about 3 am and all hell broke out in the next room.
A bit later the Charge nurse came in wanting to know what the heck I was doing. I knew from her stance the poor nurse was under the what I call night stress.
Happens from time to time there is a reason humans and animals sleep at night, not easy to turn a day creature of any kind into a night creature.
Frank, when going in for an operation, try to get the first time in the AM. The Doctors are wide awake. the first shift crew of the Nurses are alert.
Second shift not so bad unless an emergency comes at 10 in the evening, by then the nurses and doctors are tired out and just want to go home. They will do their job but perhaps miss something they should see due to having spent 10 hours with 22 patients.