Effects of time zones on North American broadcasting ...
https://en.wikipedia.org/wiki/Effects_of_time_zones_on_North_American_broadcasting
Many Fox, CW and MyNetworkTV affiliates, and some independent stations carry a prime time newscast that is similarly affected by the timeshifting of the prime time schedule, meaning that if said late evening newscast starts at 9:00 p.m. Mountain Time on one network station, an affiliate of the same network in the Pacific time zone would air its ...
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