Thank god I am retired and can sleep on my own schedule. I used to get up at 4:30 a.m. in the morning and it was pure hell. Now I follow my biological clock. I wake up at exactly 10:45 a.m. to 11 a.m., have my cup of coffee and I am wide awake, alert and do not tire until l0 p.m. at night. However, since I cram so much into my life during the day, I don’t get to sit down and do something for ME, like watch Netflix, etc. until 9:30 p.m. or l0:00 p.m. I try to be in bed by 1 a.m. Some nights I am dead to the world. Other nights I wake up and can’t sleep, so I get up and read or watch a movie or whatever, then I sleep. No two nights are alike. But I never take a shower at night - wakes me up. I do them in the morning. And I keep my room in the low 60’s with a.c. or if it is cold outside, then no a.c. but I have the windows/doors open - it feels great.