Hi There, I hope you can help. I am English and I am planning a trip to Switzerland in December. I would like to buy saver day passes in advance, with a half fare card in first class. Do I need to have already purchased the half fare card before buying the half fare saver day passes? Or can I buy the saver day passes now at half fare, and buy the half fare card when I land in December in person at the station? Essentially, is it acceptable to buy the half fare first class saver day passes, without having the half fare card already in hand?