Do you have a ticket for 1, 2 or 3 days, but you are thinking about going to all 4 days of the FEST Festival? You do not need to buy additional one-day tickets for this purpose. There is an Upgrade option that will transform your current ticket into a 4-day pass for an appropriate fee, guaranteeing full and unforgettable experiences! The offer can be used until August 9, 2023.