I have tried to find this info, but with no luck.
Each property sets its Peak/Off Peak periods based upon what's happening in their locale, so I don't think you'll find any consolidated list of dates for Peak/Off Peak by hotel. You need to check each place you want to stay for the period you want to stay and see what the points required are and that will tell you if it is peak or off peak. Here's a link that might be helpful for you to review: The New Awards Schedule is Where It's At It is lengthy but has a lot of back and forth details, some answers, and yes more concerns.
leisure travel hotels family_vacation peak off peak
Book now before 2019 peak/offpeak rates take effect. Document everything. C
Retrieving data ...