Hi r/AskHistorians! In Denmark, many old people enjoy dancing traditional folk dance to traditional music, such as seen here. I can't say if it is the same in all other Scandinavian countries, but I do know that Norwegians wear likewise folk costumes during celebrations and the like, as do the Faroese.

I'm curious as to if such folk costumes worn in Scandinavia (and specifically curious about those worn in Denmark) are true to what would've been worn historically in the past by the Danes and other Scandinavians, as well as if that's also the case for the music usually played to the dances where such costumes are usually worn -- if so, was it usually worn by upper class or lower class, and how come there is such a large regional difference in the different national folk costumes?