Three things to remember about Christmas music and why these songs differ from the other playlists the rest of the year.
1. The reason people like Christmas music is to remember happy holidays from years past. An unfamiliar song can't do that. It has no happy memories attached to it. Inserting the words "snow" or "holly" into a new song doesn't make it special.
2. During our youthful memories of Christmas, someone else was in charge of the music we heard, parents or grandparents. That's why stations that don't want to play anything before 2000 the rest of the year play almost no holiday songs written in this century. It was our elders who chose Frank Sinatra, Nat King Cole, The Carpenters and Burl Ives, not us. But we want to hear these familiar songs and pass them down to our kids.
3. The Christmas music season, even if you start in early November, is only seven weeks long. That's too short a time to introduce more than one or two new songs that year. If you start playing an unfamiliar Christmas song, it doesn't have enough time to become a favorite. You'll put it away for the year on Dec. 26, well before it becomes familiar.