Does Midsommar Happen Every Year?

"The last ritual of the film is what happens every 90 years," Aster explained. "The rest is business as usual. Although it is suggested that there are more days of celebration to come. The movie doesn't span 9 days."

Do the events in Midsommar actually happen?

Like many folk traditions, Midsummer is about the passing of the seasons. It falls near the summer solstice and is thematically similar to how that event has been celebrated in many cultures through the ages. ... But in fact, there is more overlap between the fictional and the actual celebration than you would think.

Why is Dani smiling at the end of Midsommar?

Purging Ritual – why the nine have to burn

As they all clutch themselves, pulling at their faces and bodies, as if wrenching something from within, they are all cleansing themselves. For Dani, we see this before our eyes. Now free of the burdens she's struggled with, she realises she's free, and that's why she smiles.