Hi,
Up to the end of October EMH is every morning.
I believe its certain mornings in November, then back to every morning in December.
EMH is great if you have young children, as most of Fantasyland, and a few rides in Discoveryland, are open.
Dumbo, Peter Pan, Carousel, Teacups, and either Snow White or Pinocchio in Fantasyland, plus Buzz and SM2 in Discoveryland.
Dumbo does not have fastpass, and does get busy quickly from rope-drop at 10am onwards.
My DD is 7, and isn't that bothered about Dumbo anymore, but we still do EMH just because we can, and the park is so quiet for the first hour or so. We do also like doing Peter Pan 3 times in a row without fastpass

, and rushing through the Buzz queueing area (we have actually run through it without seeing a single other person in the first hour of EMH).
Elaine