I used to be a developer/dev manager and in that life, if you booked a 9 or even 9:30 am meeting with me, the odds of me being in by then were low. I loved sleeping in.
Then I moved to the business side and my life was that quite often, I had to be at the airport say 7am. So now there was a REASON to move my life to an earlier schedule and it was doable.
Now we have little kids, who get up super early so there's yet another pull towards an earlier start to the day, and I am able to do it fine.
If there was no pull, I'd probably sleep till 10 but I don't think I'd be happier or more productive.
Trying to shift my sleep schedule for a "REASON" does not work. In fact I used to be late so often that my boss let me have an exception and work slightly shifted hours, this gave him more of my productivity.
All I wanted to do growing up was sleep. We were the first ones on the bus at 6:30am every weekday, and then my parents dragged us to some kind of sport extracurricular on Saturday mornings and church on Sunday. I would have been so much easier to deal with if I'd just had a chance to sleep.
Why is it so difficult to imagine that people have different sleep schedules? Like, we do not blink at the thought that, say, height exists on a bell curve. Why wouldn't a circadian rhythm?
God save me from the early-riser moralists.
Of tremendous importance to me was learning that not all sleep is of the same “quality”, and that quality affects you the next day. You can learn how to improve sleep quality. Matt Walker is a good start in case your interested. Andrew Huberman has some episodes on it, too, as does Rhonda Patrick.
If you’re happy with 1AM then by all means, don’t change. I wasn’t happy with how I felt during waking hours. I was getting enough sleep, but it was low quality.
That being said, when I used to be on aderall for my ADHD I would often take my second dose of the day right before going to bed, as it would help me calm my brain down and fall asleep.
Caffeine does not affect me or my sleep cycles, it does help me focus though by quieting my mind down, and on the weekends I enjoy drinking a cup of coffee and going back to sleep for 30 - 90 minutes of deep relaxing sleep.
No, this shift does not reverse in adulthood for some people... I am in my 30's and I still fall asleep midnight to 1 AM, and wake up "late" by most adult standards at around 8/9 AM.
I can not shift my sleep schedule to earlier, I've tried many times, it's just not how I am wired.