“Bonne année” is the French phrase meaning “Happy New Year.”
French speakers use “Bonne année” as a New Year's greeting, often saying the fuller expression “Bonne année, bonne santé,” meaning “Happy New Year, good health.” The greeting is exchanged in conversation, messages, cards, and family gatherings around the transition from December 31 to January 1.
In France, New Year's Eve is commonly called la Saint-Sylvestre, referring to Saint Sylvester's feast day on December 31. A festive New Year's Eve meal is often called a réveillon, a term also used for the Christmas Eve meal. Champagne, oysters, and other special foods are associated with celebrations, though menus differ widely.
“Joyeux Noël” means “Merry Christmas,” not “Happy New Year.” “Bonne chance” means “good luck,” so it is also a plausible but incorrect answer when the requested phrase is the standard New Year's greeting.