re: "Week Zero" - How does it work?

Essentially if you play at Hawaii, the NCAA says you can schedule an extra home game to recoup the costs, which means there are some teams that play 13 games. Those teams obviously have to play a week 0 game to fit a full schedule with a bye week. If you are on the schedule for one of those teams then potentially your game against them will get moved to week 0, which gives you an extra bye during the season.