The town of L’Isle-Adam, in Val-d’Oise, is gearing up for its annual carnival with a grand costume parade open to everyone, set to bring the town center streets to life on Saturday, March 21, 2026. The event will feature a lively procession in costume, free activities for all ages, community stalls, and the traditional lighting of Monsieur Carnaval, all set in a festive atmosphere.