Hi @MarsJack , thanks for posting on this community.
Indeed, there were a few requests regarding how to find a way to manage specific dates in automation, for example this one, in French: Planification envoie email a une date précise
@Florent will confirm, but this is something we have identified, that we know we can improve, and that we’re working on: it’s not possible for the moment, but it will be, as soon as we have found the proper solution to manage it and the multiple use cases related to this topic.