In 1979, a police strike in New Orleans canceled Mardi Gras from the top down... but Mardi Gras from the bottom up flourished. IMO one of the greatest Mardi Gras ever, along with 2006.
French Quarter Journal: Mardi Gras 1979
https://www.frenchquarterjournal.com/archives/mardi-gras-1979-police-strike-memoir