We are going down for a beach vacation but want to visite magic Kingdom for a day. Never purchased just 1 day, or had to deal with this calendar. So question, It appears we are buying ticket for a specific day, can that be changed, say we purchase for a Thursday, but a few days before we go its predicted to rain all day and we want to move it to Wednesday, is that allowed? Or do we wait to purchase the tickets the week of once we have seen the forecast, but then how do we get the tickets without the ability to print? I also read somewhere we have to link all the tickets in the disney app? is that correct?