It used to be about 60 days, but now it is 180 like everything else. Since you are past the 180 days for April you probably ought to start checking to see if it's still available.
Thanks. Looks like I missed my chance on some bad advice. Somebody told me 60 days out and I was waiting, but decided to double check. MDE is telling me that they only have 6 PM available.
Take the 6 PM if you really want to do it - I don't think they have later times. Not sure how it's done but I think all you need to do is check in then.
They all show 6:00 or 6:15. It will be adjusted when you get closer in time. The CM confirmed for me when I booked at 180 days out that the party is an hour before WISHES.