Greetings, Prisca!
Thanks for visiting the Disney Parks Moms Panel with your question, and an even bigger thank you for your military service! As someone who started her Disney Parks experiences at the Walt Disney World Resort, I can assure you that you are also going to love visiting where it all began at the Disneyland Resort! You will be amazed how much magic exists in such a small footprint compared to the sprawling Walt Disney World Resort parks and resorts.
As you mentioned, the
current military promotional offer for 3-Day and 4-Day Park Hopper tickets is not eligible after December 21, 2019. The
new 2020 offer begins on January 1, 2020. While there are not any discounts on park tickets this time at the Disneyland Resort, I recommend contacting your local military base ticket offer to see if you can purchase slightly discounted regular park tickets. In my past, I have seen discounts around 5% on regular tickets. While this is not nearly as generous as the promotional ticket, any little bit can help! Don't forget that many dining and shopping locations within the
Downtown Disney District offer military discounts, so always be sure to ask at each of these locations.
I recommend trying to be in Town Square of Disneyland Park at least one afternoon of your vacation so you can experience the Flag Retreat Ceremony. This is a Disneyland Park tradition since the park's earliest days. It recognizes the sacrifice and service of military service members in all branches of service. It's a wonderful patriotic experience that is a must-do for anyone with any connection to the military.
I hope this helps, and please return if you have any other questions. Have a Fantasmic day!
-Jennifer