March 14
2008 - Block Party Bash debuts at Disney's Hollywood Studios, Pixar Play Parade debuts at Disney's California Adventure, and Playhouse Disney Live on Stage re-opens at Disney's California Adventure.
More History
Since this thread is all about Disney history, I thought I would point out a new page on Disney.com that Disney is updating daily with Disney history and a brief explanation about each day's event. The page is located here: http://d23.disney.go.com/wdarchives.html
1969-President Nixon presents Mrs. Walter Disney with a special gold Medal honoring Walt for "Distinguished Public Service and Outstanding Contributions to the Public and the World"