Hi..I am from Sweden,plan my travel to Switzerland 8-21 august. Can I use the saver day pass travel from Zurich to Grindenwald? As I already bought the saver day pass for 9 august but I am not sure and confused if I really bought the right ticket, it stands "Valid for one person in the GA Travelcard area of validity". Do i have to have GA Travelcard to use the saver day pass? The saver say pass is not for tourists who do not swiss pass?