Cern'estival: the free Solidays-style festival from the 78 lands in Yvelines

A new festival is making its debut in the Chevreuse valley. On Saturday, July 4, 2026, Cernay-la-Ville (Yvelines, 78) launches the Cern'estival, at the Parc Pelouse, from 11 a.m. to 1 a.m. The concept is simple: to pack into one day the Music Festival and the Village Festival, in an atmosphere the town happily likens to a local Solidays.

Cern'estival: why is Cernay-la-Ville merging its two major festivals?

It all began with a finding by the town hall team. Organizing two major events just three weeks apart had become unwieldy, juggling volunteers, equipment, the crowd, and musical acts that were often at odds from one village to the next.

The mayor, Claire Chéret, who also serves as vice-president in charge of culture at Rambouillet Territoires, has decided to bring everything together. The July 4 date is no accident: it sits right at the end of the school year, just as residents haven’t left for vacation yet.

What to do at Cern'estival? Concerts, a gourmet market and activities

The program runs all day, drawing on three broad themes: music and live performance, social cohesion and intergenerational activities, sustainable development and local know‑how. It offers you the chance to set your own pace for the day.

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• Two stages of live concerts, with a 14:30–16:30 acoustic portion followed by a near-professional stage from 17:00 to 1:00, featuring a total of 45 musicians
  
  
• A market of gourmand artisans from 11:00 to 18:00, with food trucks and a bar running all day
  
  
• A DJ set starting at 23:00 to keep the party going
  
  
• The immersive show by Pixom and a batucada that bridges the park with the city center
  
  
• participatory workshops (bike-powered smoothies, radio workshop, glitter workshop) and about ten local producers to meet
  
  
• Information booths and associations focusing on caregivers, domestic violence, or addictions

An eco-friendly festival in the Solidays style in the Chevreuse Valley

To bring this event to life, Cernay-la-Ville has enlisted a slate of partners, including l'Usine à Chapeaux for the concerts, Mobil'villages for the social dimension, the Bazar culturel, and Rambouillet Territoires for logistics. All commit to a sustainable development charter—favoring local products, cutting waste, and inviting visitors to be participants rather than mere consumers.

Practical details first: entry is free and parking is clearly signposted, with stewards, security personnel and civil protection on site. The full program can be found on the municipality’s website and at the Rambouillet Tourism Office. We’re keen to see whether this inaugural Cern’estival lives up to its promise of a smaller, Yeévines-friendly version of Solidays.