Hi Catherine, Great news, you will be able to enjoy several Disney fireworks shows during your vacation! The incredible displays mesmerize guests year-round.
At Hollywood Studios, you'll be able to watch
FANTASMIC!. This show is presented a couple times a week in late September/early October. So be sure to check the calendar for your vacation dates. See:
HERE (switch to the right month then click on the actual days to view the daily agendas).
At Epcot, you will be able to enjoy
ILLUMINATIONS: REFLECTIONS OF EARTH. This spectacular show is nightly (weather permitting).
The Magic Kingdom has
WISHES NIGHTTIME SPECTACULAR. This too is an amazing show and is nightly (weather permitting).
Hope this helps and that you have a wonderful vacation!
Kaylene