The Rigi Railways are hosting the Rigi Historic XXL Days, featuring historic rolling stock. On August 1st, visitors can experience rides on unique historic trains. A highlight on Pentecost Sunday will be an aircraft parade with 20 historic planes over Rigi Kulm. Live commentary at various locations will provide fascinating background information about the vehicles.
Source: https://www.rigi.ch/erleben/bergbahnen/bergbahnerlebnisse/rigi-historic-xxl