Like HighHurdler, I seemed to recall that The Wizard of Oz airings back in the day were connected with holidays like Thanksgiving, but evidently it wasn't also so.
The photo is of then-CBS-TV personality Danny Kaye hosting the annual airing for the network, which was scheduled for January 17, 1965. Certainly a post-holiday treat, but not quite spot on the holidays. The annual airings, which started on CBS in 1959, were a big deal back then, getting huge audience viewing shares, back when movies could get huge audience shares on TV. I'm not sure about the holiday thing, though. Back in a previous life I had a nifty book that listed all the network airdates of feature films from back in the 60s, but can't seem to lay my hands on it right now, nor can I find the dates online. Hard to believe that! It would be good to check when TWOZ become a holiday tradition. Perhaps an Oz aficionado out there has a list of the broadcast dates….
I seem to recall TWOZ being broadcast traditionally over the Easter holiday. This was in the late 60s/early 70s.