Date. Allows you to plan. Cause is too vague and open for interpretation. You'd probably end up with some major anxiety issues either way; avoidance of anything related to the cause or general fear of wasting your remaining days. I feel like the latter of these is probably more sustainable because it's par for the course of the human experience. We sort of do that anyway.

It'd suck if you got something very close to now, but I guess that's the gamble!