The festival in Iceland that celebrates the midnight sun involves various outdoor activities and music, often called the Sumardagurinn Fyrsti or First Day of Summer festival. This event features concerts, festivals, and community gatherings where people enjoy nature and celebrate the return of longer days. It typically includes traditional Icelandic games, local cuisine, and cultural performances, showcasing Iceland's unique heritage. As it coincides with the onset of summer, the festival is cherished for its cheerful atmosphere and communal spirit, promoting fun and connection among participants.