How can I figure out when I will die?

There is a saying that "man is not as good as heaven", and there is another saying that "everything depends on man". Two sentences can explain your doubts. Man's destiny is predestined, incalculable and constantly changing. If you are a kind person, even if you are doomed to a short life, but now you are kind, do good deeds and accumulate blessings for yourself, then your fate will change, and vice versa.