here is a little info...hope it helps!
owest Attendance at Disney Parks:
January (except New Year's Day) until just prior to Presidents' week in February
The week following Labor Day until just prior to Thanksgiving week
The week following Thanksgiving until the week prior to Christmas
Moderate Attendance at Disney Parks:
After Presidents' week in February through early March
Late April through early June (except Memorial Day weekend)
The first part of Thanksgiving week
Highest Attendance at Disney Parks:
Presidents' week in February
Mid-March through Late April ("Spring Break")
Memorial Day weekend
Mid-June through Labor Day
Thanksgiving Day and weekend
Christmas week through New Year's Day
Also, during regular attendance periods, our Parks tend to be the busiest on the following days:
Magic Kingdom® Park: Monday, Thursday, and Saturday
Epcot®: Tuesday and Friday
Disney-MGM Studios: Sunday and Wednesday
Disney's Animal Kingdom Theme Park: Monday, Tuesday, Wednesday