Sion sous les Étoiles is a four-day open-air festival on the plain below the Tourbillon and Valère hills, each topped with a medieval castle, programming international pop and rock headliners to a Valais audience.
No attendance figure is collected in this pass.
The month is July. It appears on MOLT's Swiss calendar under April, which we read as the ticket on-sale moment rather than the event — a distinct class of calendar error from the Italian renderer's shift, and one worth naming separately because it produces a reader who arrives three months early rather than one.
Sion is on the main Valais rail line, an hour from Lausanne, and the valley has substantial accommodation outside the ski season.
PlanningJuly, not April — MOLT's calendar files it in spring, which is the on-sale date rather than the event.