The Christmas music obsessive is a familiar specimen. Encouraged by premature holiday displays in drugstores and overeager TV commercials, this invasive species begins to play songs like “Santa Baby” and “All I Want for Christmas Is You” months before the holiday arrives.

Less is known about the Christmas obsessive’s shyer relative: the Halloween music aficionado. Where does it live? How old is it? And what is it actually listening to? Because, really, what is Halloween music? Spotify shared data to help us answer these questions.

In the United States, the aficionado emerges about two weeks before the holiday. A sharp pickup in Halloween listening — as measured by the number of Spotify playlists with the holiday’s name in them, compared to playlist listening overall — becomes observable then, before culminating in a major spike on the spookiest day of them all (or, as happened last year, the Saturday that precedes it).

So where are these people anyway?

Here are the top five states in which people listened to the largest proportion of Halloween playlists over the past 10 days:

1. Utah 2. West Virginia 3. Ohio 4. Pennsylvania 5. Arkansas

And here are the states where Halloween music was most popular 10 days before the holiday in 2017:

1. Utah 2. Ohio 3. New Hampshire 4. West Virginia 5. Pennsylvania

Halloween is huge in Utah! This checks out for Rob Ferre, a Halloween-obsessed D.J. who lives in a suburb of Salt Lake City. Mr. Ferre answered the phone on Tuesday already in costume (he was planning to attend a party as Newt Scamander, from “Fantastic Beasts and Where to Find Them”). Halloween is his favorite holiday.