Perhaps an easily calculated date/period.
What is more difficult is a clear statement of what should happen, and when, in order to avoid the collapse. Of course, the "what-should-happen" elements will continuously change as the date approaches.
Oh, and the political courage to timely implement those elements no matter the level of resulting discomfort. Probably not going to happen with politicians beholden to those who would be discomforted.
It is a pointless exercise to even discuss what should happen. Because what should happen will never happen.