Some examples that I've either seen or heard of:
KQTV-TV, Ch. 2 in St. Joseph, MO, would, in the mid 90's, tape delay ABC's Saturday Morning showing of the Bugs Bunny & Tweety Show (Which aired at 9-10AM CT Saturdays at that time.) for a hour long newscast. The show would air at 5:30-6:30AM on, I think, Sunday morning.
WDAF-TV, Ch. 4 in Kansas City, MO would, for several years in the 80's-early 90's, during it tenure with NBC, preempt NBC's Sunday night 6-7PM programming for Hee Haw.
KMBC-TV, Ch. 9 in Kansas City, MO, for close to a few decades, refused to clear ABC's World News Sunday opting to instead air reruns of Rescue 911 (Or other syndicated programming.) followed by a half hour newscast & later a full hour newscast from 5-6PM on Sundays. They wouldn't clear WNS until sometime in the mid 2010's when the Sunday 5PM hour long newscast was shortened to a half hour at 5-5:30PM.
There is a bunch of others that I can also think of that I may make a post about later.