Well it seems everything is coming out early this year. Last year I think the party for the senses came out in late june, and most of the other stuff came out in July.
Official WDW site doesn't even list the dates yet. They just announced a California Food & Wine Weekends for Disneyland last week. They are taking reservations for that through the Disney Gallery Website. Maybe they are going to see how that works out & start Booking for Epcot the same way. The schedule last year didn't come out until July. Also they were rumoring that they might go to 8 weeks this year which may be why they don't have the dates listed yet. The had the dates on a sign at the guest services window at Epcot in January. Does anyone know if they are still posted there? But of course it is always subject to change.