2025 marks the 40th anniversary of Holiday in the Park at Six Flags Over Texas. This year's event features Merry Main Street, which is the centralized hub to meet Santa Claus, decorate cookies with Mrs. Claus and enjoy tons of snow falling all around. Entertainment favorites, such as Holly Jolly Trolley, return, while Tinker's Toy Factory debuts in Southern Palace Theatre. The anniversary celebration also features millions of Christmas lights, thousands of new decor pieces and plenty of holiday treats.