Karneval is an annual festival celebrated in Germany and other parts of Europe before Lent. The tradition started in the Middle Ages as a way to scare away the ghosts of winter and marks the beginning of Lent. Key cities that celebrate Karneval include Cologne, Dusseldorf, and Mainz. Festivities generally begin on 11/11 at 11:11pm and last until Ash Wednesday. During Karneval, people enjoy parties, parades, balls and dress up in costumes.