Historically speaking, rates for Jan-April have been released sometime around the last week of Sept/first week of October. Prior to last year, there had been a second round of room discounts (% off rack rate) valid during the first part of the year, released around Jan-Feb. But there was not a second round of winter discounts released in 2019 - in Jan of last year they released a % off discount that didn't start until April reservations.
IF they are going to do a %off discount for the first part of 2020, we should hear something in the next week. But I feel like that might be a giant IF.