Before the single saver day passes they used to sell "a 6 pack of day cards" (pay for 5 get 6), they were valid for 3 years. I have 1 use left on one which expires on Aug. 21, 2020. I do have a trip booked (many months ago) for Switz. beginning Aug. 19 so I still should be able to use that 1 day pass...but I can't project 4 months into the future.
Have they extended the expiration dates?
Probably a moot point, they
sold 2 varieties of the 6 packs: (a)valid on
weekdays (NO holidays) after 9:00 AM, (b)valid even on weekends (incl. holidays), no time restriction; (b) was considerably more expensive than (a).
But, the (current) saver day passes are always cheaper on weekends--seems to be the opposite of the "old" 6 pack pricing.