I've similarly shifted my sleep patterns to more normal hours compared to my 20s, but I think a lot of it is just down to a natural shift in sleep cycles with a

I've similarly shifted my sleep patterns to more normal hours compared to my 20s, but I think a lot of it is just down to a natural shift in sleep cycles with age. At least, I tried quite hard to change my sleep patterns in my 20s and failed, whereas now in my 30s they've changed without much effort on my part.