@
escape4....I started checking availability as soon as the Santorini Secret Suites came online with Hyatt for a June 2019 stay....so not 12 months but I would guess around 7-8. The message you get when you search made me feel like the hotel was blocking awards vs just not having any award rooms available. I checked multiple dates and always got the same message. Here's what the message says: (even if you search today for some availability)
Unfortunately, this hotel is not accepting World of Hyatt points or award during those dates. Explore our other rates or modify your search.