If you go to your cruise on
DCL and open your reservation, go up to planning center and under my reservation, open my cruise activities. It will give you 'little cards' that shows each day. Most say 'no activities' but day one and day seven (St John) shows "1 ship activity' click on that and Day one will show you sail away party and day 7 will show you Pirate party. Will it change? maybe.
Calling DCL is not always going to give you a correct answer either. Numerous calls were made regarding dress nights on our recent EBPC cruise and we all were informed two formal nights, NO semi-formal nights. We had two formal and 1 semiformal. That is usually the standard on a 14+ night cruise. But nobody was told about that semi-formal.