Thanks @Paul Raven for the details on FC. Odd to know that CBS scheduled new episodes on holidays like Christmas and NYE. I believe Knots also had new eps air on Thanksgiving New Year’s Day as well. Then again, perhaps for some watching FC on Christmas was perhaps a nice excuse/escape from real family chaos lol.

Yes it was odd to schedule FC Xmas Day. Just throw on a movie. Dallas was pre-empted so why not FC?

FC had just started and needed that Dallas lead in to establish itself.

If anything, I would've aired a Christmas-themed episode that stood outside the ongoing stories, in case the regular viewers weren't tuning in.