I can't see anything on Disney's official calendar for any of those dates though. It's only from Touring Plans that I've seen the information come through about the AK EEH too
Although that may explain why I could have sworn I saw EPCOT EEH on Touring Plans too to start with. Annoying that they wouldn't just wait 24 hours to advise that park hours have been updated to make sure it's accurate first.
Disclaimer: I am a newbie planning my first trip, so yeah, I don't know what I'm doing and probably shouldn't be commenting on these types of threads