Christmas celebrations are still going strong in Val-d'Oise! The town of Sannois invites everyone to gather from December 19 to 21, 2025, at the Jean Mermoz square for three festive days that are sure to delight visitors of all ages. What’s planned? A stunning sound and light show, a charming Christmas market, a lively ice skating rink, and the chance to meet Santa Claus and Mrs. Claus in person!