Why Is The Wizard of Oz Associated with Christmas?

We recently posted a review of The Wizard of Oz , one of two movies we consider "honorary Christmas" films despite lacking actual holiday credentials, but we didn't really investigate why it's associated with Christmas in the first place. Fair warning: the background here is a bit murky, so this is going to involve a bit of speculation when it comes time to connect the dots. That said, I think I've put together a fairly strong case for how an adaptation of a kid's book from 1900 became tangled with the holidays despite having no obvious yuletide connections. I think there are five primary factors at play: the movie's central theme, its star, its signature song, its most obvious imitators, and the decision to air it around Christmas in 1959. Let's start with that air date, because I think it's the simplest connection. Assuming the list on Wikipedia is right, The Wizard of Oz was first aired on television in 1956, when it was shown in early November.