Despite our differences in social upbringing, nationality, language, religion, etc... We all agree in 1 thing, that Die Hard is a Christmas Movie, right?
Yippee Kay Yay... (The only movie that doesn't depresses me in Xmas)
If the only thing a Christmas movie takes is being set on or around Christmas, Batman Returns and Eyes Wide Shut are Christmas movies. Oppenheimer has a Christmas scene, is that a Christmas movie too? Clearly there's a line somewhere.
That's not the only reason, it literally is about a family man trying to reconcile with his family for Xmas, there's a Grinch trying to ruin the party, a Xmas miracle, let it snow, let it snow, let it snow. It's Christmas Theo.