Hey there, Kristine!
Welcome to planDisney and thanks for bringing your question to us! It sounds like you're gearing up for a fun end-of-year visit to the Disneyland Resort. That's a great time to go because the days become cool and comfortable and the nights are not too chilly as long as you bring some layers.
I'm afraid that we don't have any inside information about when
"it's a small world" Holiday will actually open. At this time, the official opening of the
Holiday Season at the Disneyland Resort this year is November 15, 2024 and the opening of the Park's Holiday overlays will usually match that date. If experiencing the Holiday attractions like "it's a small world" Holiday or
Haunted Mansion Holiday is important to you, then I would recommend scheduling your visit so it definitely falls after November 15 (especially if you want the best chance to see the newly
Expanded Grounds of the Haunted Mansion).
My favorite Holiday Season show has got to be
A Christmas Fantasy Parade, so take some time to catch that if you can! If you do happen to visit in the period between the Halloween and Holiday Seasons, the good news will be that crowds generally decrease a bit before the Holiday rush. Please note that
"it's a small world" is generally closed for several weeks before the Holiday Season begins as Cast Members transform the ride into its Holiday overlay.
Kristine, I hope that helps you in planning your upcoming visit. Even if you aren't able to make the Holidays, I would choose to spend a day at the Disneyland Resort over anywhere else any time of year! Please come back again if you have more questions for us. We'd love to hear from you and assist you once more!
Wishing You a Great, Big, Beautiful Tomorrow!
-Al