Possibly my favorite Christmas movie ever and my family had the same tradition. This is the movie that puts me in a real Christmas mood, mostly because of all the great memories it evokes from my childhood.
I didn’t know it before, but the Bing Crosby version of the song ‘White Christmas’ is the best-selling single recording in the world (sorry, for some reason the direct link isn’t working):
https://en.wikipedia.org/wiki/White_Christmas_(song)