When Is Mardi Gras Day 2025. Mardi gras carnival 2025 falls on the day prior to the religious season of lent begins. Mardi gras day is more popularly known as fat tuesday and that falls on march 4, 2025.

Unlike christmas or the 4th of july which always fall on the same calendar day, the only thing you can. Mardi gras 2025 is tuesday, march 4.