Why is it that only China people in the world have a nominal age? How did the "nominal age" come from?

Since modern times, the way of calculating age in the West has gradually spread all over the world and to China. So in order to distinguish, they are called nominal age and full age respectively. This gives people the illusion that China people have lost their lives. History of nominal age: the summer calendar divides a year into December, and adopts the method of "fixing the new moon"-taking the first day of each month as the new moon, dividing the tropic year into 24 solar terms, and setting the leap in the month of qi deficiency as the first month, that is, (hereinafter referred to as), taking an integer of 366 days as a year, and adjusting the time difference by subtraction and positive leap.

However, the leap month in the summer calendar is very troublesome and erratic, so the actual age can only be calculated by the method of aging at the end of the year, that is, adding one year in the last month of the year. If you add a new year at the beginning of the year, you must carefully calculate the leap month, because the lunar calendar implemented in ancient China is a lunar calendar, and the number of days in each year is not fixed. There is even a month difference between a normal year and a leap year. It's easy to confuse your age with the way to increase your age at the beginning of the year.

Generally speaking, from the Spring Festival to the day before birthday, the nominal age is two years older than one year, while from birthday to New Year's Eve, the nominal age is one year older than one year. 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.

If you still find it difficult to understand, then please understand the fake year as the zodiac clock. For example, a baby born in the year of the pig is born in the year of the pig. If he plays cards right away, he will become 1 year old. Two days after the Year of the Rat, he immediately played a card, and two cards became two years old. Why do China people make up such a false age? So, why do China people have this shocking era? Just to get dad married? Although you are only 25 years old this year, you are already 27 years old according to the fake age, rounded to 30 years old! It's too late for blind date now!