There is definitely a link between sunlight and healthiness. Mental health as well as physical health. Look at places like Northern Scandinavia, Russia and Alaska, they all get almost total darkness through the winter months and their suicide and alcoholism rates are sky high compared to countries on the equator.
I like to start around 1100 after waking naturally at 1000, getting my act together, ablutions, coffee etc and then I’m good until about 0300. I wake feeling refreshed and I’m on my game all day.
But, if I get up by an alarm clock, whether it’s 0930 or 0400 it makes no difference, I’m tired all day and often need a kip in the afternoon, I still stay awake until 0300 too so an early start always means less sleep for me.
I’m fortunate that my job fits my circadian rythym, we do a lot of Midnight to 0300 deliveries and I do mine at the end of my day, rather than the beginning, if I get a long tip it means I’m on hourly pay for laying in bed too, which is nice
I did a spell doing the fruit markets in the early 90s, only a couple of months, that was all night work and it never gave me any problems, I was going clubbing all night at weekends too, so I never had to revert back to days at the weekend as lots of night men do.
Although at that time I was having a break from running over the water. In those days it was all go go go, one hit everywhere you went and then get on the ■■■■ when you had free time, I was a lot younger obviously, but it took its toll all the same, especially in my sleep pattern and the fact that I’m useless before 1100 (not much cop after it either) probably has something to do with those times.
We work in a stressful environment, have a poor diet, don’t rest, sleep or exercise enough, it’s no wonder we get old before our time