Disneyland Park in Anaheim, California, will celebrate its 100th anniversary in 2055. The park originally opened its gates to the public on July 17, 1955, on a day famously referred to by Walt Disney as "Black Sunday" due to various opening-day mishaps. While the Walt Disney Company celebrated its corporate 100th anniversary recently in 2023 (founded in 1923), the physical theme park has its own distinct timeline. By 2055, Disneyland will have undergone a century of "Imagineering" evolution, likely incorporating the massive expansions currently planned under the "Disneyland Forward" initiative. Fans expect a celebration even grander than the 2005 "Happiest Homecoming on Earth" (50th anniversary). The milestone will likely include a century of nostalgic reflections, high-tech updates to "Opening Day" attractions like Peter Pan’s Flight and Autopia, and potentially the unveiling of new "E-Ticket" experiences that utilize technologies that haven't even been invented yet, solidifying Walt's promise that the park would never be completed as long as there is imagination left in the world.