Back in my earliest shift days, I rotated day/night. I routinely offered to work New Years Eve night shift, ending my shift at 7AM Jan. 1. Unfortunately, Jan 1 was considered my “day off” and I was always bounced back to day shift Jan. 2. Eventually, I did a gig with straight nights. Then I got out of hospital work.
Were you the one who volunteered to test for red ant repellants too?