This may be a dumb question, but I just want to be sure...
I just bought a Half Fare Card and set the "valid from" date to a couple of days before we arrive in Switzerland. Now I want to go ahead and buy a Saver Day Pass, at the half fare price, for one of the days when we're there. I'm assuming that this is valid, since the Day Pass date will be after the start date of the Half Fare Card. But just wanting to make sure that the "valid from" date = the date I can start travelling for half fare and not the date I can start purchasing cheaper tickets from. I don't want to get into trouble when I'm there...