David wasn't usually one to sit up until midnight. He was an "all tucked up in bed by 10pm" kind of guy usually, so it was a bit out of the ordinary that he sat up in his pyjamas reading a book still just before midnight. Perhaps it was the desire to see the old, bad year out, and see in a clean fresh start.
It was a little surprising to hear a knock on the door, and he looked up over his reading glasses and called out, "Come in," thinking it was likely one of his two children.