Banner. Stolen.
'Die Hard' screenwriter confirms that it is, in fact, a Christmas movie, as if there was ever any doubt
https://mashable.com/article/die-hard-is-a-christmas-movie-duh
When CNN's Jake Tapper asked screenwriter Steven E. de Souza about it on Twitter, he confirmed that he sees Die Hard as a Christmas flick, right down to the fact that "a woman about to give birth features prominently."
https://twitter.com/StevenEdeSouza/status/944812347461218305