The official Star Wars Celebration website has posted some dates for Celebration Anaheim (April 16-19, 2015) that you should be aware of if you're considering hosting a panel, registering for the art show or for media credentials, or exhibiting on the show floor. Here are those dates:

• Fan Programming: You can submit your panel proposals now. Lucasfilm will begin responding on April 7, 2014; all proposals must be sent by December 15, 2014; and Lucasfilm will make all fan programming decisions by February 1, 20145.
  
• Art Show: Official Lucasfilm Star Wars artists can begin applying on April 21, 2014.
  
• Exhibitors: You can now apply for booth space, banners, ad space in the programming guide, online ads, and other forms of sponsorship. Pricing will be announced on February 28, 2014.
  
• Media: Registration for media credentials will begin on October 15, 2014.