#1--Someone else made the point that if one thinks that if Die Hard is a Christmas movie, then one should also consider Stalag 17 a Christmas movie.
#2--Because of this debate, I refer to Casablanca as my favorite WWII movie. It's not a war movie really, but it is certainly all about World War II.
On Her Majesty’s Secret Service must be a Christmas movie too.
One of the songs is “Do You Know How Christmas Trees Are Grown?”