The story
The Rhineland carnival is a licensed inversion: the city is handed to a Prince, Peasant and Maiden, and the floats are built to insult whoever has earned it that year — politicians most of all, by name and likeness.
Cologne, Düsseldorf and Mainz each send their own parade, and the rivalry between them is part of it. Offices, schools and shops in the Rhineland simply close, though it is not a legal holiday anywhere.