Night Owl or Early Bird May be DNA based?

I've always been a night-owl. I work nights as a Registered Nurse, and I do my best writing at night. It's interesting that something like this could be hard-wired into us from the beginning.
https://www.sciencenews.org/blog/science-ticker/dna-may-determine-if-youre-early-bird-or-night-owl?tgt=nr