Mushroom Day is observed in Scandinavia, specifically in Denmark, Norway, and Sweden, every first Sunday of September. This day highlights the important role that mushrooms play in nature and encourages the public to explore mushroom hunting. The celebration originated to educate people about the various mushrooms that grow in the region, with events organized by environmental organizations such as the Norwegian Association for Mycology and Foraging and the Swedish Mycological Society. Activities include lectures on edible and poisonous mushrooms, foraging workshops, and cooking classes. Historically, mushrooms were not widely consumed until King Charles XIV John of Sweden and Norway introduced them to the court cuisine, leading to their popularity among the general population. Common edible mushrooms in Scandinavia include penny buns, chanterelles, and hedgehog mushrooms, which are featured in various traditional dishes across the three countries.