Confiserie at Port: looking in the window with port reflected in glass. Their candy is very popular all seasons, and especially for Nice CARNIVAL. In France, Carnival (the celebration that culminates in Mardi Gras) is an occasion for festivals in towns across the nation. The carnival in Nice France is the biggest and most spectacular in the country. At the time of carnival Nice France erupts into a citywide party, with parades in the daytime and evening and a large bonfire and fireworks on Mardi Gras itself. Flower processions, floats, and parties make Nice the place to be for carnival in France.