The earliest zombies are said to have originated in China. They were called Drought Demons at that time. The legend of Drought Demons originated very early. For example, in the Book of Songs, there is a poem that says, "The Drought Demons are so cruel that they feel as if they are burning." The ancient myth "The Classic of Mountains and Seas: The Great Wilderness Bei Jing" says: When the Yellow Emperor fought against Chi You, Chi You invited Feng Boyu Master to cause violent storms and rains. Huangdi invited the female slave to stop the wind and rain, defeated Chi You, and killed him. Later, the female demon could not return to heaven, so she lived on the ground. Where she lives, there is no rain all year round. This female demon is the drought demon.
Zombie Day is not a Swedish invention in the first place.
Later it became popular in major cities. Of course a city like Stockholm, heavily influenced by American culture, would follow suit. Zombie Festival is a kind of performance and can also be seen as a kind of street performance art. If given some serious themes (some zombie festivals want to make themselves look more different), it can be expressed as a response to topics such as food crisis and environmental pollution. Reach and focus.
However, I think this form of art performance is more like a carnival where everyone has a party and has fun together, similar to eurostar