I had that my entire life, and then one day started having the strangest medical condition where it is literally impossible to sleep past ~6:30am.

It sounds unbelievable but you’d have to experience it to understand. But the end result is it “fixed” the delayed sleep issue.

I’d give just about anything to be able to just sleep and keep sleeping, but on the up side now I’m an early bird with extreme regularity and quite like it.

I also have sleep drift problem and consistenyly had it for the past 7 years.

I discovered that it helps when I actually put in effort to fix my sleep schedule. Like getting off screen 1 hour before I sleep. Boxing bedtime to 23:00-08:00. And similar things.

It is just really difficult to fix for me but it doesn't feel impossible. I have made progress in last 6 months but trying different methods and only some portion of that progress stays permanent.

Also have the same experience fighting depression-like symptoms and anxiety. It just takes a lot of time and is difficult. Some people just don't have these problems and I do but this doesn't mean I am genetically attuned to be like this and I can't do anything. It is just difficult.

I've found my sleep regularity to be pretty malleable. It can become a habit. When I was in grad school I went to bed at midnight and woke up at 7am. Once I started running more in the mornings, I gradually shifted to going to sleep at 9pm and waking up at 5am.

The first couple days or week will feel pretty bad, but if you give yourself enough time then you'll shift your sleep schedule around. Now I get tired at 8:30pm and fall asleep at 9ish like clockwork. grad school me would have considered that insane considering I'm doing less work on average during the day. My day is just shifted now so that I do more stuff in the mornings and really relax in the afternoons, which is the opposite of before.

A key is actually giving yourself enough time to fall asleep. Most people think they can hop into bed and just get 8hrs, when you actually need to hop into bed around 30mins beforehand and really relax with a book or something.

I also think it's important to not stress about sleep a lot. Unless you're literally feeling miserable or have apnea, I think it's better to just let yourself relax if you wake up in the middle of the night. Sometimes I'll snap awake at 2am and just read for 2hrs, then get 2 more hours of sleep and generally feel fine.

Do you have non24 sleep disorder? Eliezer Yudkowsky has it and @exfatloss150 . Both have written about how they manage it.

You are not alone.

Recalling from college neuroscience classes and subsequent reading of research, the studies show the ordinary human sleep cycle when unrestrained adds about a half hour per day, so 24.5 hours is 'natural'. Long-term studies with all time cues carefully removed ended up with subjects on a ~50 hour sleep schedule, as in awake 36-38 hours and sleeping 12-14hrs.

This is also why it is easier to travel across time zones to the west than to the east.