then why havent i seen julia in the living room in my 40 days once?Since those both happen at night, obviously it's when you've got the options for him to wake up/go back to sleep.
The game doesn't consider times like 20:00/21:00/22:00/23:00 to be night, because KST has "night" set up as being after 23:00.
For... reasons, I guess.