Definition and Age Groups
We can define the age of an individual as the time elapsed since his birth. During this period of time the natural process of growth, maturation and involution of the various human qualities and abilities takes place. In this regard, the life cycle is divided into various age groups:
| Neonate | up to 28 days of life |
| Infant | from 4 weeks to the year of life |
Early childhood: |
from 1 to 24 months of life |
| Second childhood | from 2 to 6 years |
Third childhood (childhood, school age) |
from 6 years until the onset of puberty |
| Puberty and Adolescence | from the appearance of sexual characteristics up to about 22 years |
| Pediatric age | from 0 to 14 years |
| Early adulthood | 22 39-years |
| Second adulthood | 40 59-years |
| Third Age | 60 75-years |
| Fourth age | 75 90-years |
| Fifth age | > 90 years |
| NOTE: the temporal classification of the stages of the human life cycle may vary slightly depending on the sources consulted. The chronological age does not always coincide with the biological age; a sporty forty year old, for example, may have a biological age of 30, vice versa, an obese and sedantary thirty year old may have a biological age of 40. Similarly, a boy may have early or delayed puberty. |
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Age Calculation
Answer the question "What is your age?" it is quite simple, since it is understood that our interlocutor wants to know how old we are. But what if they asked us to express our age in months or even worse in minutes? The following calculation module performs the necessary conversions, saving the visitor from intrigued mental calculations. The only care is to insert the date of birth in the following format mm / dd / yy. For example, if we were born on January 20, 1980, we should enter 01/20/1980 as the date of birth.
| Birthday | month / day / year | |
| Age on date: | month / day / year | |
| = | years months | |
| = | months | |
| = | settimane | |
| = | giorni | |
| = | ore | |
| = | minutes | |
| Your birthday: January February March April May June July August September October November December 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
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