Your chronological age is the amount of time that has passed from your birth to the given date. It's your age in terms of years, months, days, etc. This is the primary way people define their age.

Why is chronological age important?

1 The Adult Years. Some researchers suggest the use of chronological age as a marker for the timing of adulthood, whereas others suggest the transition to adulthood is better characterized by events or rites of passage such as graduation from school, starting a job, or having a family (Neugarten and Hagestead 1976).

Is chronological age a good or poor indicator of age and why?

It turns out that your chronological age, or how old you are based on the passage of time, is a poor indicator of your health and even, past a certain age, a poor indicator of survival or mortality. ... Aging may be inevitable – but what happens to your body and mood as you age is partly up to you.