The official end of Mardi Gras is actually one of my favorite parts of Mardi Gras. I’m not happy that Mardi Gras is over, I just happen to like the tradition.
At midnight, the police announce that Mardi Gras is over, telling the crowds to go home. A wall of mounted police make their way down the street in the French Quarter, usually followed by street sweepers.
No one leaves and the party continues, because the answer to the question is that Mardi Gras never really ends. Time to start planning for next year.