On a 6-night Disney Cruise Line itinerary in 2026, you can generally expect one formal night and one semi-formal night. While Disney is famous for its relaxed "cruise casual" atmosphere, these designated evenings allow guests to dress up for portraits and elegant dinners. For men, formal wear typically ranges from a tuxedo to a suit and tie, while women often wear evening gowns or cocktail dresses. If you prefer a more relaxed vibe, "semi-formal" usually means a jacket for men (no tie required) and a nice dress or pantsuit for women. It is important to note that dressing up is entirely optional; guests who choose not to participate can still dine in the main rotational restaurants in cruise casual attire, though swimwear and tank tops are always prohibited in the dining rooms. These themed nights are often highlights for families looking to capture professional "lifestyle" photos with Disney characters who also don their finest gala outfits for the occasion.