Practically nocturnal, it means that people who stay up really late do so because they love staying awake through the night, thus saying for these people that night is the time when they do things most do in the day. It also mean that they may wish that everyone did what people normally do in day was done at night instead.
Tash: Yeah I know
Jamie: I hate going to sleep early in the night. I love the night, I wish I was nocturnal.
Tash: That'd be sooo cool!
Jamie: Yeah, Night is the new Day!