I have no medical knowledge, but intuitively this makes sense to me. If you stay up longer, you need longer to refresh. It's not like you can stay up for 24 hou

I have no medical knowledge, but intuitively this makes sense to me. If you stay up longer, you need longer to refresh. It's not like you can stay up for 24 hours and then just get a regular sleep. I have a similar pattern, but I need around 7-8 hours of sleep, so mine starts at 11 pm and waking up between 6 or 6:30 am.