What would you like to know? We got married on the Magic in this past OCt.
DCL can and will change things around to fit the ships schedule, for weather or other activities.
1st. There is a small ceremony at a designated spot on the ship, before the ship leaves port. This is where you are legally married. For us it was infront of the Walt Disney Theatre. The actual ceremony is another day. Deck 7 is the primary location on the Magic and Wonder, with 1 of the lounges designated as a back up, in case of weather. You dont really get a choice of times for the ceremony, though it could have changed.
Theres 3 spots for a ceremony/VR. Theres 2 on the ship and 1 on the island. Initially, when we booked our wedding, we were told that we were going to be married on the 2nd at sea day which would have been thurs. Not long before we left, the date was changed to our 1st sea day, between KW and GC. Not a big deal. We had a sunset ceremony and I want to say it was aroun 5 pm. We found out later, that the other couple onboard, were married before us, earlier that afternoon.
All of this was on the Magic. Ill be honest in that Im not sure where on the Dream class they will do the above.