If you have park reservations, and they decide to make one of those days a Good To Go Day, you have no need for the reservations and can enter any park that day at any time. There's no 2PM concern those days. If it's a Sat/Sun, you shouldn't have a restriction on MK either - no park reservations would be required. It happened to use one day in Jan, and it appeared our original park reservations were removed from
MDE, but I don't know if that's the norm. But you wouldn't need to do anything - it's just like pre-park reservations.