Good question. I don't really have an answer for you, however maybe you can look up when the last couple of dates have been released to give yourself a better idea. Also, when they are released, I am sure that it will be posted here on the day of.
thank you ma'am. i'm looking to do the party again in september since the crowd level was more than manageable. looking at last year's dates, they seemed to schedule them for every tuesday and friday throughout the month. i'm just wondering if they'll keep the same pattern for this year. hard to guess not knowing what wdw is anticipating crowd levels to be.