Part of the problem is that I'm extremely routine-oriented. I don't mean that deviating from my daily routine upsets or something, but that my brain expects roughly the same things to happen at the same times every day and acts accordingly.
One way this manifests is that on weekends my brain expects to be working during work hours even though it's the weekend, so I end up doing "work"-like things to keep myself busy and then after work hours I can finally properly relax. The fact that it's a weekend doesn't even really register to my brain.
But naps are probably the most jarring example of this: if I take a nap and then stay awake past my typical bedtime my brain just kinda short circuits and doesn't know what to do. Like, I could in theory play games or do tasks or literally anything at all but my brain is just like "i'm supposed to be sleeping and you don't do anything while sleeping" so I'll just sit there sort of paralyzed not wanting to do anything at all because my brain is in "I'm supposed to be asleep mode" even though I'm not tired.