I'm trying to remember the old hours between 2016-2019 (when my wife and I were childless and traveled for work, which is when we were going a lot). I want to say MK and EP were both usually open until 11p back then.
I'd guess anywhere between 8-9 hours. However, we aren't ride crazy guests. We very much go at a leisurely pace, spending a decent amount of time eating and drinking (non-MK parks). Plus, we liked to park hop, so it wasn't unusual for us to hit up three parks each day.
A typical day for us could look like:
Animal Kingdom Morning (all stand-by):
- Everest
- Safari
- Dinosaur
- Bonus: Drinks at Dawa Bar
Head over to Magic Kingdom:
- FP+ Selections:
- PeopleMover
- Carousel of Progress
- Refresh app and see what you can get (maybe a Buzz or Pirates or Jungle)
Head back to resort for pool/pool bar/lunch
Epcot Evening:
- Get Soarin' or Test Track FP+ by refreshing app
- Spaceship Earth
- Watch Illuminations (or hit the ride we didn't get a FP+ for)