What are these "Surprise Mornings?" Simply put, starting from tomorrow (December 25, 2015) and through December 31, Cast Members will allow a limited number of Guests to enter The Land pavilion OR Test Track one hour earlier than park opening (with the exception of Tuesday, December 29, as the park will already open at 7 a.m. for Extra Magic Hours) to experience Soarin' OR Test Track before the rest of the Guests. The only caveat is that once Guests enter either pavilion, they may NOT exit the building until park opening; that said, Guests can re-ride the attraction as many times as they wish.
http://www.orlandoparksnews.com/2015/12/surprise-mornings-returning-to-epcot.html