I really haven't received any non-emergency calls at midnight for years. App notifications, on the other hand..., uh.

I just set my phone to DnD with calls allowed and notifications silenced, and it works wonders. Maybe it should be the default?

Generally no. But we had former presidents that tweet at 3am, does that count?

Some people are just set up differently. I have to mute my phone at night because of this with one person in mind. I tend to do that anyway but there are certain people I'd like to be able to contact me then if there's an emergency. Unfortunately there isn't a straightforward way to allow just them to cause ringng on my phone either.

This person just doesn't get it either. When we were in school they'd walk into my dorm room at about 3 in the morning too if I didn't lock it

The friendly people from Windows Technical Department keep calling me at various times of the day and night to tell me about the malware I supposedly have on my computer. I now ignore all calls unless I know the number or am expecting a call from a doctor or similar.