Soo idk how people around the world celebrate midsummer but at least in Finland and Sweden it's a pretty big deal. We have a bonfire and do old finnish love spells and burn grass dolls.
Since it's based on a christian guy my whole family celebrates it and basically the whole Finland does. It's name Juhannus comes from Johannes Kastaja, the guy who baptised Jesus. I've done those things my whole life and just now I'm realizing how it's pure magick.