I did a search in the forum for pirate night and I seen where some people had it on Nassua night and others had it on
Castaway Cay night. So your guess is good as mine. I also notice that some of the diner rotations were set up were you would have the same dining room 2 nights in a row (e.i. PTTA). One of the nights in a row was pirate night. I did find someone that posted the menu:
Appetizers: Blackbeards Jumbo Crabcakes, Cannon Smoked BBQ Chicken Drumsticks, The Buccaneer's Sun Ripened Pineapple, Pearls of the Caribbean
Bread Speciality: Jamaican Banan Bread Loaf
Soups and Salads: Chilled-to- the Bone Honeydew Melon and Mango Soup, Caribbean Style Spicy Veggie Gumbo Soup, Hideaway Bay Salad, Jerk Chicken Salad, Mr Smee's Bib Lettuce
Main Course: Treasure of the Seas Grilled Shrimp and Seared Scallops, Jack Sparrow's Fruit Marinated Roasted Loin of Pork, CC Chicken Breast Rubbed with Pirate Island Spice, Capt n Hook's Coconut Crusted Oven Baked Snapper and The Black Pearl's Oven Roasted Beef Ternderloin
Desserts: Shiver-Me-Timbers White Chocolate Cheesecake, Floating Island of Tropical Fruit Treasures, Walk the Triple Layer Chocolate Gangplank Cake, The Lost Banana Treaure, The Calypso Ice Cream Sundae
Not only that but there will be a late night buffet and Deck Party.