A person's birth time is pre-decided based on the past life(s), and so is the departure date from this earth. As humans, we always aspire to live a long life. Ayushmaan Bhava, or live long, is probably the most common and desired blessing we seek through our elders. https://www.outlookindia.com/outlookhub/can-we-know-life-span-from-birth-details