Rotating shifts are a death sentence, IMHO. I turned down a great paying job at a local factory when I found out it would be monthly rotating shifts.
Day shift is just my worst nightmare. From birth, I always wanted to stay up all night, and go to sleep at around dawn or 5am. Needless to say, school was just an unending horror show. I was sick constantly, and many times by the time Friday came, I was such a mess from lack of sleep that I just refused to go to school. I missed over half of K,1,2,3,4 and almost half of 5th and 6th. I missed 37 days of freshman year of high school, but only 17 my senior year, and 10 of those was when I had the flu and then came back too soon. I would repeat the flu nightmare the first year of college, when I got the flu vaccine and about 12 days later, got the worst flu ever. I ended up dropping a lot of classes due to that flu bout.
I've worked from 1130pm to 8am for the last 12 years, and 12am-830am for almost 10 years before that. My only day shifts were the result of people dying, or me getting severely hurt. Both times were near disasters. The first one, my boss's mother and brother died a day apart, and he had to go about 450 miles for the funeral, etc. I worked as the boss for 14 days in a row. On the way home from the last day, I fell asleep twice and the first time I just missed hitting a railroad overpass support by inches, and less than a minute after that scaring the hell out of me, I fell asleep again, and blew a red light at a very busy intersection. I swore I would never work more than one day shift in a row again. I couldn't keep that promise. When I got hurt and had to have knee surgery, the HR head decided that I needed to work day shift. I explained to her that that wasn't compatible with my basic life functions, but I ended up doing it for 3 months, complaining constantly and fighting the urge to sleep all day. Finally, I was able to go to 2nd, which I didn't like all that much, but it was tolerable. Finally about 8 months after my knee nightmares began, I went back on 3rds.
You day timers have my respect. I don't know how you can live like that!