Hi, Jennifer!
The recent announcement of the Fantasyland openings does leave some room for curiosity. But in "Disney-speak," one might translate "holidays" as anywhere between Thanksgiving and Christmas.
It's possible that these attractions will be in soft opening during the time of your visit, but there are no guarantees. Unfortunately, we here in Florida are at the mercy of the weather, which, in the summer, can be something of a challenge.
Consider scheduling your vacation as late in the year as possible -- if possible, and you can rearrange your schedule. And do subscribe to the
Disney Parks Blog. As timelines and release dates become clear, that'll be your first and best source for information straight from the Mouse's mouth.
Have a great trip!
See you later, celebrator,
-Deborah B.