Interesting tidbit of information for you. The radio station credited with starting the trend to all Christmas music is KVIL in Dallas, actually licensed to Highland Park. They did this many years ago and the industry watched to see what would happen because this station was a major player in the ratings back then with legendary morning man, Ron Chapman. They were actually nationally ranked, very heavy hitter and they're suspending their normal programming for all Christmas in the most important ratings sweep of the year? As ballsy a move any station has ever made. The results came in and stations began to follow suit and as many as 4 were doing it in Dallas the last time I lived there.
In my 9 years in my last radio gig in OK, I had my Oldies, soon to be known as Classic Hits because us old folks don't like the old word anymore than we like the no word, flip to Christmas music every year to mixed reviews but by far to the positive side but it was generational, the younger listeners into the Oldies didn't care for Christmas music so I played my regular format online since they were more likely to be net savvy.
If you ever get the chance to see the research on Christmas music and it's effect, done by The Research Group, it is really interesting. The dichotomy is that more people get the blues and depression during the holidays than any other time of year and you would think that the reminder with Christmas music would exacerbate that but it does just the opposite. It is a testament to the power of music to change the mood and lift the spirits.
The exceptions to that have been known to drive people to homicidal rages, which if I were a juror would accept as an insanity defense. "Grandma Got Run Over By A Reindeer", any Chipmunks Christmas song and the barking dogs Christmas song are responsible for drinking too much during the holidays and murder.