I have done some pretty weird shifts in my life.
The most weird was three days on for 8 hours, one day on call for 24 hours and four days off.
Yes, a eight day week. 🙃
Actually loved it. Yet you got to be ready within a one hour notice on the fourth on call day. And it could last the full 24 hours. Which was rare though. Usually 8 hours if you get called at all.
The hardest schedule had to be 12 hour days and no days off for three months straight. Benefit? A full months paid vacation.