As everyone in the UK knows Raymond Briggs, "The Snowman" is a firmly established favourite tradition. The book was first published way back in 1978, can you believe!
(i'm not sure how well known it is outside the UK, would love you to let me know though.)
However it has become a firm tradition in our family to go and see Christopher Bell conducting the Royal Scottish National Orchestra performing The Snowman live, while the animated story is shown on a huge screen. Christmas music, carols and songs make up an evening of entertainment. I always take my niece who just loves the silly song where all the audience has to stand up and join in with all the actions! This year it was the penguin song, so the whole audience was hopping about like penguins at one point!!!