[siphor]

I would doubt genetic reasons until he tries without all the modern light/darkness. It’s insane how quickly my sleep schedule changes when I sleep in a tent and the sun is unavoidable at literally sunrise... I match the sun schedule pretty quickly, and then get out of it really quickly (1-3 days).

[kaybe]

I think walking around outside all day and not having to concentrate really hard sitting in front of a screen also helps a lot.