Disney's Festival of Holidays at Disney California Adventure Park has started! Are you ready to experience the most magical time of the year at the Disneyland Resort? We brought you a taste of the holiday additions to Disneyland yesterday and today its Disney's California Adventures turn. The Festival of Holidays is a unique celebrations from around the world. Explore the sights, sounds and flavors of a holiday celebration inspired by diverse cultural festivities and traditions. Disney's California Adventure Christmas Decorations have arrive.