[kbart]

I can get up early and do things, but I feel best when going to bed at 2-3am and getting up at 10-11am. By "natural" cycle I meant that if woken up without an alarm clock and go to bed when feeling sleepy (i.e. during lazy holidays) I tent to align to the mentioned hours.

Has there been any scientific evidence suggesting this is the case?

Can't find it after quick googling, but I've read about a study which claims that there are no such things as "night owl persons", but it didn't convince me as it was talking about extreme cases as staying up all night long and sleep during the whole day.

[mitola]

But yes, I remember reading in science journals regarding the natural rhythm of averagely around 10-11 o'clock in the morning. As the person mentioned before it was naturally for him to wake up later, or it was harder for him to wake up, until he god used to the unnatural rhythm.

But there was also some evidence regarding the era before modern technology and electricity about the time when people go to sleep naturally. which is actually surprisingly due to instead of spending time on screens they spent it socially or with other activities and still ended up in bed quite a bit later