Unfortunately I don’t have a single favorite Christmas movie. I can, though, doff me hat to ‘Miracle On 34th Street’ and ‘It’s A Wonderful Life’, both from 1947; ‘A Christmas Carol’, from 1951; and the inevitable ‘The Christmas That Almost Wasn’t’ from 1966, featuring Paul Tripp. That last one came out when I was in the second grade.
There are all kinds of other movies, too, that take place during Christmas, including ‘Edward Scissorhands’, and ‘Home Alone’, both from 1990. I don’t usually think of them, though, as being about Christmas. They’re just really good and interesting.