4-6am to ~1pm. Whenever some unforeseen external factor forces me to change it (usually an unwelcome social obligation in the morning), I quickly gravitate back to it.
4am-7am - 11am-2pm, all week, very consistent, extremely stable against perturbations
Sun-Thurs: I try to go to bed by 9pm, read/watch some show and hopefully fall asleep around 10pm, wake up at 5:45am.
Fri/Sat varies.
00:00 to 06:30 but I wish I could sleep an extra hour. Zero dream recall these days.