There are some huge 40th anniversaries coming up this year for horror fans; as you’ll see (and probably already realized), 1979 was a mighty big year for the genre. But that’s not all. As long as you’re planning one party, might as well recognize these other spooky classics that are marking milestones in 2019. Advertisement 1929 Disney’s Silly Symphony series—animated musical shorts that delighted moviegoers while providing the studio’s artists an inspiring canvas for experimentation and innovation—kicked off in 1929. The first entry was “The Skeleton Dance,” directed by Walt Disney himself; over a decade, the series picked up seven Oscars and introduced a charismatic new character named Donald Duck. The appeal of “The Skeleton Dance” for horror fans really needs no explanation; 90 years after it first debuted, watching those jaunty, jaw-snapping bone-shakers creeping out of their graves for a wacky dance party is still macabre entertainment at its finest. Another 1929 release worth mentioning: Un Chien Andalou , the legendary surreal short from director Luis Buñuel (his first film) and artist Salvador Dalí. While the film is classified more as “avant-garde” than straight-up “horror,” any movie that opens with an eyeball being sliced open by a straight razor—thanks…