Now speaking of age, do you mean nominal age or one year old?

Either way, the imaginary age is a way to calculate the age.

1, nominal age is a traditional way of counting age in China, and it is also very popular in other East Asian countries. It is used to calculate the time sequence (ordinal number) that a person is going through after birth, which is based on one year after birth, because this is the first year after birth and has nothing to do with the pregnancy time that has been experienced. It is different from the current international age calculation method, which calculates the length of time that has passed since birth (as a base, it can also calculate the mantissa, such as three years and two months, seven and a half years, etc. ). In China, in order to distinguish two ways of calculating age, there are two names: nominal age and full age.

2. One year old is an internationally accepted age calculation method. It calculates the length of time that has passed since birth (based on the age of zero at birth), and can also calculate the mantissa, such as three years and two months, seven and a half years, etc. ). In China, in order to distinguish it from the traditional way of calculating age, that is, to calculate the order of years after birth (ordinal number), there are two names: one year old and nominal age.

Extended data:

According to the lunar calendar, the nominal age will increase by one year every year from the beginning.

A person's first birthday is counted from scratch, and every birthday is one more year, according to the foreign calendar (solar calendar).

Because the calculation rules of nominal age and one-year-old age are different (the sequence of years being experienced is different from the length of time that has passed), the corresponding calendars are also different (the lunar calendar is different from the solar calendar). Generally speaking, a person is two years older than one year from the Spring Festival to the day before his birthday, and one year older than one year from his birthday to New Year's Eve. People born before and after the Spring Festival are the same in some years, or they are three years older in nominal years than in full years.

Baidu encyclopedia-nominal age

Baidu encyclopedia-one year old