Hello Alfred, and welcome to the Disney Parks Moms Panel!
Rivers of Light: We Are One is a beautiful glowing show that takes place after dark. Because of this, showtimes are adjusted throughout the year so it will be dark enough for the performance. I just checked the
park hours calendar for your trip in June, and I noticed in early June
Disney's Animal Kingdom Theme Park is scheduled to be open from 9:00 am to 8:30 pm, with one performance of Rivers of Light: We Are One at 9:00 pm. With sunset in Orlando occurring around 8:20 pm or so that time of year, it should be the perfect setting for the show.
Alfred, although park hours are released approximately 180 days in advance, I would consider those to be "preliminary" hours. Often operating hours are tweaked a bit in the weeks leading up to a particular date. During the summer months, Disney's Animal Kingdom Theme Park is often open until at least 9:00 or 10:00 pm. I know last June it was open late enough on many evenings to have multiple performances of Rivers of Light. I would not be surprised at all to see park hours extended and the performance schedule updated prior to your arrival in June.
I hope that helps! Please feel free to visit the Moms Panel again with any additional questions you have as you
plan your Walt Disney World Resort vacation. Enjoy!
Anne Marie