Park hours for September

I’m trying to make my plans for my September trip. The park hours posted on Touring Plans are considerably different than the ones posted on Disney’s own website. Does Touring Plans have some inside information on this?

They are using historical info from 2018 / 2019. Nothing is definite, even on Disney’s website, until about 12 - 15 days in advance. (Even then they’ll extend hours if needed - rarely reduce)

While I make drafts of plans months & months in advance I’ve learned that my “real” plans can’t be made until about 30 days in advance. Even then, I’m often updating them even the week of my trip.