EMH is weird in Disneyland, there are 2 kinds (and if you have an Annual Pass, occasionally a 3rd kind). In the morning there's Extra Magic Hour for all hotel guests and that switches depending on the day. There's also Magic Morning, which is basically an EMH for people who pre-purchase 3-day tickets, promotional tickets that explicitly come with it, or SoCal Citypass holders, and that's only in Disneyland on the same day you'd use EMH anyway so if you're staying in a hotel it doesn't really count.
Just the details version:
The current Extra Magic Hour schedule allows registered Resort Hotel Guests access to one park for each day of their stay on these select days:
- Disneyland Park: Tuesdays, Thursdays and Saturdays
- Disney California Adventure Park (including access to the brand new Cars Land): Mondays, Wednesdays, Fridays and Sundays
Magic Morning is one early admission (during the duration of theme park ticket or Southern California CityPASS) to select attractions, stores, entertainment and dining locations at Disneyland Park one hour before the Park opens to the general public.*
Magic Mornings at Disneyland Park are available during these select days:
- Tuesday, Thursday or Saturday
Here's a link:
http://disneyland.disney.go.com/calendar/early-admission/