When Is Mardi Gras 2025 In Louisiana 2024. Mardi gras, fat tuesday, will next be celebrated in louisiana on tuesday, march 4, 2025. Fat tuesday is the last day of the carnival season as it always falls the day before ash wednesday, the first day of lent.

That being said, fat tuesday is the biggest day of celebration, and the date it falls on moves around. Here’s when and where to.