Hello Joseph!
As a military family, we love all that Walt Disney World has to offer for active and retired military members.
At this time, Walt Disney World Resort does not offer a military discount for single day admission. However, you can visit the Shades of Green Resort (located across from Disney's Polynesian Resort) to purchase your single day admission tax-free.
If you will be visiting Walt Disney World Resort for a longer period of time, I suggest looking into the current
Armed Forces Salute ticket promotion. It really is a fantastic deal!
If you're planning on visiting Magic Kingdom Park on your visit, I suggest heading directly to Guest Relations (located inside City Hall) to see if there is availability for the Flag Retreat Ceremony taking place that day. It's a wonderful ceremony honoring all of the military branches and features active or retired military guests. I highly suggest taking it in on your visit, even as a spectator. The ceremony typically takes place around 1700, but this can vary. I suggest grabbing a Times Guide and verifying the exact details for the day of your visit.
I hope you have a magical visit this month! Please come back and see us if you have any other questions!