If you factor in that not much work is getting done in many western countries until early January the actual migration time is more like less than two weeks.
Now I don't know how easy it is to move from hyper.sh to alternatives, but that is unprofessionally short regardless.
I would have expected at least three months. Is it possible that they are that short on money that they need to shut it down immediately? Seems like it.
Let that be a lesson to not rely on cloud infrastructure too much without designing your architecture to be somewhat cloud agnostic.