The tickets for the Disney Christmas celebrations typically go on sale in the early fall, usually in September or October. The exact date varies from year to year, but Disney usually releases the tickets several months before the event. You can check the Disney website or sign up for their email newsletter to be notified when the tickets go on sale. The Christmas celebrations are popular and tend to sell out quickly, so it's a good idea to plan ahead and purchase your tickets as soon as they become available.