Osny

Mardi Gras 2026 in Osny: An Evening of Music at the Forum of Arts

In Osny, the Municipal School of Music is hosting a lively Mardi Gras celebration at the Forum des Arts et des Loisirs, featuring an open-to-all acoustic concert on Tuesday, February 17, 2026, at 8:30 PM. Students will take the audience on a journey through global musical sounds, creating an inclusive atmosphere — costumes are encouraged if you feel like dressing up.

Osny Christmas Village: ice rink, fireworks, and festive family entertainment this weekend.

The Château de Grouchy in Osny (95) will once again host the Christmas village and its activities from December 5 to 7, 2025. Don't miss the concerts and shows, the ice rink, and of course the unmissable fireworks display!

Halloween 2025 in Osny (95): pumpkin contest and immersive trail at Château de Grouchy

The Château de Grouchy in Osny (95) opens the gates of fright for Halloween, on October 31, 2025. With pumpkin contests, bewitching tales and an immersive haunted trail, get ready for an evening of mystery and magic. So... are you ready to shiver in the dark corridors of this historic Val-d'Oise monument?

Heritage Days 2025 in Osny (95), visit program

For the Journées du Patrimoine 2025, discover Osny, a historic jewel in the Val-d'Oise, on the weekend of September 20-21. Between centuries-old monuments and cultural events, let yourself be charmed by this town full of surprises!

Heritage Days 2025 at the Musée départemental des Sapeurs-Pompiers du Val d'Oise (95)

The Musée départemental des Sapeurs-Pompiers du Val d'Oise, located in Osny, is taking part in the Journées du Patrimoine (Heritage Days), offering children and adults alike a glimpse of the firefighting profession, on Saturday September 20 and Sunday September 21, 2025.

Fête Nationale 2025 in Osny (95): Fireworks on July 13, 2025

Like every year, Osny is one of the towns to celebrate July 14th with a fireworks display that promises to be grandiose!

Fête de la musique 2025 in Osny (95) with the group Les reines du Baal

Osny celebrates another Fête de la musique on Saturday, June 21, 2025! Join the group Les reines du Baal in Parc de Grouchy to enjoy pop and rock hits from the 60s to the 2000s.

An unusual LEGO exhibition opens in Osny (95) in April

In April, on Saturday 26 and Sunday 27, a 100% LEGO exhibition opens its doors in Osny.

My Dreamland, the indoor playground for the whole family in Osny

Located in Osny, in the Val-d'Oise region of France, My Dreamland offers children aged 0 to 12 and their parents the chance to spend a playful moment exploring and exercising in its 2,300 m² indoor playground.