Fodor's Expert Review Mardi Gras

The biggest event on the city's cultural calendar is also the oldest—it's been around for more than a century. Parades roll almost nightly for the last few weeks of the Carnival season, which starts on Twelfth Night and culminates on Mardi Gras (or Fat Tuesday), the last blow-out party before Lent begins on Ash Wednesday. The big day itself is a city holiday, with the streets taken over by costumed revelers, floats, marching bands, and throngs of partiers. Plastic beads are the currency of the day. Every year, Mardi Gras falls on a different date, but it's always in either February or March.