The national costume of the deceased can't be done, and the festival has been cancelled. I can't remember when the captain's treasure was. You can look at the calendar system and see when the corresponding festivals are. Moreover, when the festival begins, the main city will have a task to ask you to go to NPC. It's easy to finish it. Pay attention to the achievements of dance in the guild. You are definitely not the only one who has achieved this result. Watching others jump this achievement also means that the festival has begun and lasted for several days. Don't worry about missing it.