It not the NFL, it's the NHL, originally Bombers were to start @ 3:30 pm & Jets were to start @ 6:00 pm, Dec. 05th for those who watch both and or attend one or both, couldn't travel from one venue to the other, or get home in time, couldn't do so. As a result both CFL & NHL worked to solve the issue
Bombers moved earlier 30 minutes & Jets moved to start later 1 hour.
I started following the CFL in 1962 and for most of my childhood and teen age years, the games were on Saturdays. The Grey Cup was on Saturday, too. It was great. As a kid, I watched the AFL and NFL, but was only able to see a few CFL games because of where I lived and weather conditions. Still, I loved radio and remember how special fall Saturdays were. My recollection was that the Western games also were on Saturday but it was a long time ago. I think it would be great to move the games because when you have a good distance to travel, you can go home on Sunday instead of having to take a work day off just to go home. My opinion, anyway.