Local holiday in the Canton of Vaud, Neuchâtel, and part of the Jura Bernois only.  Same rules apply as for national holidays - be prepared to find local shops and schools shut. Geneva canton is open as usual as they have Jeûne Genevois 10 days earlier.

https://www.vd.ch/formation/jours-feries-et-vacances-scolaires/jours-feries-et-vacances-scolaires-2025