The Question and Answer section for We is a great resource to ask questions, find answers, and discuss the novel.
The Table of Hours was the daily schedule designated by the One State. Everything was regimented, timed, and scheduled..... the hours for sleep, eating, and even sex are regulated, no exceptions allowed.
The second part of your question calls for...
Which character is Zero?
Extripating the fancy is an operation remove the soul. No one had a soul... D503 did, though he didn't understand it. The one thing he did know, was that he didn't want anyone performing an operation while he was working on the rocket ship.