Most people always argue is this a Halloween movie or a Christmas movie? I say it's a blend of both but at heart it is a Christmas movie, and it may have to do with the little fact that Christmas is in the title!!
The Nightmare Before Christmas is a stellar piece of work created by Tim Burton based off of the story he wrote by the same name. It follows several ghoulish inhabitants of Halloweentown, specifically Jack Skellington who has grown tired of Halloween and is searching for something new. He soon finds several mysterious doors in the woods and stumbles across Christmastown where he is fascinated by everything and decides to make the holiday his own. This is without a doubt a Christmas movie, because Jack discovers Christmas for the first time and delves into why he enjoys it so much and why he wants to make a Halloween themed Christmas. This movie is just awesome, the characters are unforgettable, the animation is amazing, I don't even have to touch on the music by Danny Elfman since almost everybody has heard it and enjoys it. Hell I could sing the whole thing right now, I am that much of a fan of this movie. It's a wonderful movie and I always watch it around Christmas time, it resonates with you because of the characters and attempting to dissect and understand Christmas and the film succeeds incredibly so at that. If you haven't seen it I strongly suggest you do so. And ironically, this is a Christmas movie you watch when you want something different from other Christmas movies, very much like Jack who wants something new and different besides ordinary Halloween things. That is a sign of how good a movie is when it can connect with audiences without them even seeing it. Give it a watch, and have fun making Christmas.