This article contains spoilers.

Ari Aster‘s new film Midsommar sends a group of friends to Sweden to take part in a fabled mid-summer festival. As the synopsis notes, what begins as an idyllic retreat quickly devolves into an increasingly violent and bizarre competition at the hands of a pagan cult. During a Reddit AMA today, Aster answered some interesting questions about the film.

As we learn throughout Midsommar, some of the activities take place annually, but the movie also documents a much stranger ceremony that only takes place every 90 years. Chatting on socials, some viewers appear to be confused about the cult’s festivities – are there sacrifices every year or *only* every 90 years? – and Aster clarified the lore during the AMA.

“The last ritual of the film is what happens every 90 years,” he explained. “The rest is business as usual.”

Interestingly, he also pointed out that the film concludes before the actual celebration does: “It is suggested that there are more days of celebration to come,” Aster noted. “The movie doesn’t span nine days.” In other words, we haven’t seen *everything* there is to see.

Another thing about Midsommar you may have wondered is who exactly was it that killed Josh while wearing Mark’s skinned face, Leatherface style?

“The man wearing Mark’s skin is Ulf,” Aster confirmed. Ulf, you may recall, was the character who was most displeased about Mark having urinated on the ancestral tree.

[Related] ‘Midsommar’ Originally Received an NC-17; Extended Cut on the Way!