You might consider calling the Diamond Support line to ask that question. 1-844-774-7300. If I had to guess, those nights would post in 2023, but that is simply a guess. I did think I read something about requesting IHG manually post 2021 dates in 2021 if the dates straddle, but again, I think you should ask. You could consider sending a private message to their twitter team as well, if you'd like to have it in writing. The twitter team has been thorough in their responses to me.