I am now 58 years old and something happened and I wake up at 6 in the morning every day for 6 months, if I have to get up or not. I was never a morning person, but now I am and I have no explanation for it. I like it, but I try to not bother others with it.
Yeah there’s a reason retirement homes serve breakfast at like 5AM and dinner by like 5PM. As you get older, your circadian rhythm tends to drift more towards waking and sleeping early.