I woke up at 7pm today. Tomorrow I'll probably get up at 9pm. Around this time next week, I'll be waking up at 7am.
This is normal for me. I have a rare-ish circadian rhythm disorder known as #Non24. My sleep cycle doesn't track with the sun. It's not at all rare amongst people who are blind, but it's rare amongst sighted people.
I also suspect it's actually more common than believed & there are people out there reputed to be lazy, immature, or erratic when they just can't sleep normally.
@sysop408 I too have sighted non-24, clinically diagnosed after sharing my sleep actigraphy data from a Garmin watch which I wore for a few years prior to diagnosis.
Pre-diagnosis, I was struggling to entrain to the day/night cycle for all of my life, since literally as early as I can remember. It has affected my life in so many ways, the most recent being becoming unemployed directly due to my disability.
@TrinitronX I wonder if other people who have undiagnosed or late diagnosed Non24 have the same fascination with stories about people who can't sleep.
Even before I realized I had a bonafide sleep disorder, I had been fascinated with stories about sleep, or especially people who couldn't sleep. It's as if subconsciously, I recognized that was my own representation in front of me.
I remember watching the 2002 remake of the movie Insomnia and being completely riveted, not by the suspense or mystery, but by its depiction of #sleep deprivation.
Sheldon
TrinitronX 
šµLuke