DH and I are traveling with our 2 year old in early December. We intend to use the rider switch option when available. My question is, do you have to use the pass the same day obtained, or can we use it on another day of our vacation (e.g., are the passes dated). Many years ago we did this option with my stepsons. I remember them giving us a non-dated, recycled pass to use upon return. TIA!