Hello Elecca!
Thank you so much for visiting the Disney Parks Moms Panel. I’m so glad you will be visiting the Disneyland resort soon, and with your sister. What a magical time you will have together. Please thank her for her service from us here at the Moms Panel as well!
I am assuming as an Eligible Service Member, she is purchasing the
Military Promotional 3-Day Park Hopper Tickets. These tickets work a bit differently than the regular 3-Day Park Hopper tickets. Your sister, and all members in your group using the tickets, will have to present the first day you visit. Then the remaining 2 days on your ticket will have to be used before the expiration date in October 2015 (black out dates may apply and dates are subject to change).
If using a non-military
3-Day Park Hopper Ticket, once you visit the park for the first day, you then have 13 days from that date to use the remaining visits on your park tickets, so you wouldn’t be able to use them as far out as the summer.
I hope this helps your planning and please feel free to ask me any additional questions you may have while planning your visits!
Have a magical day!
-Emily