I'm 28 so maybe it will change as I continue to age. I used to be able to sleep until 3pm if I really wanted too(assuming I had no alarm clock to wake me up to

I'm 28 so maybe it will change as I continue to age. I used to be able to sleep until 3pm if I really wanted too(assuming I had no alarm clock to wake me up to do something productive). Now I naturally wake up around 7am-9am no matter how late I stay up.