How old are you when people ask you?

Age, as the length of a person's existence from birth to calculation, is usually expressed in years. Age is a natural sign with biological basis. After a person is born, with the passage of the sun and the moon, his age increases, which is an irresistible natural law.

People are breeding their own times at the same time, and the times are always composed of individuals of different ages born in different times. In addition, various demographic phenomena, such as marriage, childbearing, schooling, employment, migration and death, are closely related to everyone's age. Therefore, it is of great significance to calculate the age correctly.

Extended data:

China's customary age calculation method is based on the calendar year after birth, that is, even if he was born in 1 year, he will increase 1 year every New Year. Generally calculated according to the lunar calendar, but also calculated according to the Gregorian calendar.

For example, a baby born at the end of 65438+February is 1 year after birth, or 1 year after the Gregorian calendar or the local Chinese New Year. In this way, the baby is only a few days old and is already 2 years old. This method of calculating nominal age is simple, but unscientific.

The number of days elapsed from the date of birth to the date of calculation. It reflects people's real life time more accurately than one-year-old age, but it is rarely used for demographic statistics because of its complicated statistical summary. In real life, except for babies under 1 year, especially newborns under 1 month, people usually don't calculate the exact age by day.