Yes, Mickey's Toontown Madness is held Monday, Wednesday, Friday and Saturday.
This is the official word from the
www.disneyland.com web site:
Mickey's Toontown Morning Madness
As a Guest of Walt Disney Travel Company, wake up and enjoy MICKEY'S TOONTOWN MORNING MADNESS* an hour before Toontown opens to the general public. This enhanced experience offers you the opportunity to meet and greet some of your favorite Disney characters.
The Mayor of Toontown, Mickey Mouse, leads a comical ceremony in which everyone becomes a citizen of Toontown - and thats when the madness begins!
Your favorite characters will be showing off their homes, playing games and getting everyone involved in their Toontown civic duties! Dont forget to ask for an autograph from Mickey or some of his pals - theyre always happy to oblige!
*Operation of Attractions and appearances of characters are subject to change without notice. Restrictions apply. Available for one morning during your stay on Monday, Wednesday, Friday and Saturday.