What defines a holiday movie?

One of the biggest debates I have with friends is whether Die Hard can be considered a holiday movie. On the one hand, the movie’s focus is around the action and struggles of main character John McClane, as he tries to stop the assault on Nakatomi Plaza by terrorists while also trying to protect his wife. On the other hand, the movie is riddled which Christmas themes, music, and an overall setting (the movie takes place on Christmas Eve). My question being: is a movie classified as a holiday movie just by nature of it’s setting, or is it required to utilize the overall themes and expectations of the holiday to gain that classification? More specifically, does the movie need to have some kind of moral lesson revolving around the holidays to make it a holiday movie, or are the settings and holiday themed visuals enough? Where is the line?