Hello Carey! April will be here before you know it! I hope you have your countdown to Disney started! Your questions reflect a good planner! We love good planners at the Disney Parks Moms Panel!
You are correct regarding park hours for Disney's Animal Kingdom on April 21, 2020.
The Disney Parks Calendar does currently show a 5:00PM closure time. While this is an unusual closing time, it is possible that the park is hosting a private event for the evening. Park operating times are subject to change so I encourage you to continue checking the calendar as April approaches.
You are also correct regarding the schedule for April 22, 2020. This Disney-planner is impressed! Even though the park will close at 8:00PM, it is not unusual for the
Rivers of Light: We are One show to be held at 8:30PM. Don't worry, you won't be asked to leave the park! You are also correct that you see a special-ticketed event for that same evening. This is the
Disney After Hours event at Disney's Animal Kingdom. This event begins at 9:00PM and concludes at 12:00AM. It does require a special admission ticket. These events are scheduled on select nights throughout the year. They feature very low crowds and very low (if any) wait times for select attractions. Another special feature of this event is that ticket-holders are permitted to enter the park as early at 7:00PM!
Carey, keep using all of those great Disney-planning resources! You are reading them correctly!
Hakuna Matata! Jonathan G.