Well, for quite awhile I've had a review category for holiday movies, which mostly meant Christmas, but also serves for a few other holidays. But as for Halloween movies, I mostly just put such things under scary movies or supernatural & paranormal. If there was anything that fit in those two sections, but which I thought would be appropriate to watch on Halloween (whether or not they're set on Halloween), I'd list them on a page called Halloweenish movies (in the All Hallow's Eve section of my website). But awhile back, I also started a subsection of my short film reviews for horror shorts. And some of those were set on Halloween, but many weren't. To make things more complicated, I also reviewed short films that were set on Halloween, but which I wouldn't call "horror," so those were scattered in other subsections of my short film reviews. Finally, I decided just to move all my reviews of any film set on Halloween, whether feature length or short subject, to a single category of movie reviews. So, here it is: my list of reviews of movies set on or around Halloween, whether or not they are horror movies.
See also Halloween short films, Halloween TV movies, Halloween specials, and holiday web films