Netflix is planning to provide plenty of gifts for viewers of its two Christmas Day games, including Mariah Carey kicking it all off with a taped performance of “All I Want for Christmas is You.”.

Creating the NFL schedule is a complicated process that requires tens of thousands of computers coming up with countless possibilities over a process that lasts about four months.

Game kickoff shifted

Tom Brady had just retired, Russell Wilson was in Seattle and the free-agent frenzy hadn’t even started when the NFL schedule makers started to dig in after the Super Bowl on putting together the complex puzzle of a 272-game schedule.