It’s the last 2 weekends of May and the first 2 in June. Best guess are 5/20-22, 5/27-29, 6/3-5 & 6/10-12. (6/3-5 is also gay days. While not a Disney sanctioned event, some people prefer to avoid the parks at this time. I’ve seen and heard some very unDisney language and shirts which is really not that much different than any other times at WDW unforuntately. I’ve also been with a friend who thinks it’s wrong and wanted to avoid gay days and didn’t know he was actually there then. Just a consideration for some.)
Last years dates:
Star Wars Weekends 2010 Dates Announced Disney Parks Blog
Star Wars Weekends | Walt Disney World Resort
I’m a Make-A-Wish volunteer in VA and planning on going 2nd weekend in June. If the local chapter decides to grant this wish and I can be of any help, feel free to contact me and I’ll help anyway I can, even being his personal tour guide for the weekend.