Is it absolutely certain and nothing I can do to change it?

If so fuck yes I’m pretty much immortal tell that date.

oh just because you know when you’ll die doesn’t mean you can go yolo on everything. Getting into a horrific accident and becoming bed ridden for the rest of your life doesn’t count as dying. Imagine laying in bed, body paralysed, knowing that this is the place you’ll spend 30 years in.

You’d still be need to be as careful as usual, just with a painful awareness of how many seconds you have left until the end, and with a curse of not being able to go on your own terms if something terrible happens.