Disneyland park has announced how it will celebrate Mickey Mouse's 90th Birthday this November:

Quote Originally Posted by Disney Parks & Resorts

Disneyland park will host a celebration cavalcade for Mickey Mouse on November 18, featuring some of his special friends and the Disneyland Band, starting at “it’s a small world” and pausing for a special moment at Sleeping Beauty Castle before continuing down Main Street, U.S.A., to Town Square.

The party continues when World’s Biggest Mouse Party begins at Disneyland Resort in 2019.