Hello there Soondus,
Welcome to planDisney and thank you for your question! I love visiting the Disneyland Resort in December - there is no better way to celebrate the Holiday season and close out the year then a visit to the Happiest Place on Earth.
Currently,
theme park reservations for standard
theme park tickets are able to be booked about six months out from the current date. You can see on the
Theme Park Reservation Availability Calendar that reservations for standard theme park tickets are available through early December.
Since it sounds like the calendar you're looking at only offers reservations through September, I'm wondering if you don't have standard theme park tickets? There is currently a
3-day ticket offer running through the summer months from June 10 through September 26, 2024, so the reservations would also only be available through the end of September when this promotion ends.
If you're not sure what type of tickets you have, or if you'd like to see if your current tickets are able to be upgraded to standard tickets then I would recommend
calling a Cast Member at the Tickets line who will be able to see the specific details of your situation.
Thank you again for your question, Soondus! I hope you have a wonderful visit to the Disneyland Resort later this year.
Have a Magical Day,
Greg