And?
I've done local news on Christmas for years now (as the newsroom Jew, I'm always happy to have something to do and let my colleagues enjoy the day off), and over 30 Christmases, I can only think of one that had anything that would pass as "local news" of significance.
That's in a market ten times bigger than Yuma, and one that actually has severe winter weather.
If the kids making minimum wage to put on a newscast get the holiday off instead of standing at the airport talking about travel advice or getting MOS at the highway rest area... is anything of real value lost?
It's not like local TV news is the appointment viewing it might have been a generation ago. I suspect NP&G would have been programming to fewer than 1000 viewers that day.