It varies day to day. To complicate things, Magic Morning (attached to many 3+day tickets) is only for Disneyland's days. Early Magic Hour is for on-site guests each day of their stay, and allows whatever park is open for MM/EMH that day. So if you stay on-site, you can get in early to whatever park is assigned that day. But if you are off-site and using your ticket, you get into Disneyland on the assigned day once during the use of your ticket.