To be annoyed at DS sleeping from 4pm-10pm every day?

[oliverandmacy]

DS is currently at university, this is really big for him and I appreciate it's important.

I get home at a similar time and just don't see him, he goes to sleep, then I see him from about 10-11 and then I go to sleep and he starts to study. He says he studies much better at night time.

He had a spell of depression which is why he is at our home town university. Part of me then wants to leave him to do what he is happy but I'm concerned doing that will make him worse?

I'm not sure, don't like it. AIBU?

@HoobaHooba

Most people with a degree of autonomy and not working in “production line” operations - especially at management level- will structure their day to reflect energy levels though?

Eg I don’t book meetings for directly after lunch (energy slump) and I try to do the majority of extended writing/ mid morning and mid afternoon.
I often take more detailed or nuanced work home to take advantage of the quiet at night