When Is 2025 Mardi Gras In Louisiana. Mardi gras 2025 is on march 4th 2025, with the main celebrations happening in the two weeks leading up to the date itself. South louisiana mardi gras parades are set to begin on jan.

South louisiana mardi gras parades are set to begin on jan. 6, with the last of the major parades taking place on march 4.