Yes, Disneyland enforces a specific dress code for Grad Nite events to ensure safety and a family-friendly atmosphere for all students and chaperones. In 2026, the guidelines remain strict: students must wear "appropriate" attire, meaning no clothing with offensive language, graphics, or excessive tears. Clothing that drags on the ground or is overly revealing is prohibited to prevent trip hazards on rides. While school-affiliated apparel is encouraged, students cannot wear anything that resembles a costume or masks, as Disney wants to ensure there is no confusion between guests and Cast Members. Accessories like studded jewelry or large chains are also banned for safety reasons on high-speed attractions. It is a "pro-tip" to check with your specific school coordinator, as individual schools often add their own requirements (such as "business casual") on top of Disney's baseline rules. Failure to comply can result in being denied entry to the private party after regular park hours, even with a valid ticket.