No, I did not have the occasion to celebrate this day in New Orleans, but Mardi gras (fat Tuesday) is enjoyed today in many countries and places, as it is the last day of Carnival. Lent starts on Ash Wednesday.
https://en.wikipedia.org/wiki/Mardi_Gras
I could only see pictures of New Orleans, Venice, Cologne, etc., as here, Mardi gras is not an official holiday:
Venice:
Cologne:
(found on-line)