1994 How old are you now?
The above calculation method is based on the age of one year. One-year-old age, also known as full-time age, refers to the number of anniversaries or birthdays experienced by * * * from birth to calculation.
For example,1A census was conducted at 0: 00 July 1990, and1A baby born in February 1989, with a nominal age of 2 years. Actually, it's just been more than six months, and I haven't celebrated my birthday yet. According to one year old, it should be less than 1 year old. One-year-old age is often 1 ~ 2 years younger than the nominal age, which is a commonly used age calculation method in population statistics.
One year old-0 years old at birth, every Gregorian birthday 1 year old.
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The ancients also had methods to calculate age. The article "The ancients recorded their birthdays with cadres and branches, and sometimes they had to do applied problems to calculate their ages" described the calculation method. Part of the text of the article is as follows:
People in China began to remember their dates of birth very early, but at first they recorded them in the form of calendars. In the 4th century BC, the famous poet Qu Yuan wrote in Lisao: "I was born on Gengyin Day in the first month of the Yin year, but I was born on Gengyin Day." . The "Geng Yin" here is a way for ancient people in China to mark the date.
The trunk branch is a combination of heavenly stems and earthly branches, including ten heavenly stems such as A, B, C and D and twelve earthly branches such as Zi Chou Yin Mao. These two can be combined into 60 pairs, and so on.
Before the Han Dynasty, the dates in historical records all appeared in the form of dates, which directly determined the way of recording the date of birth. For example, Duke Zhuang of Lu was born in Dingmao in September 706 BC, the same day as his father Lu Huangong, so he was named Jitong. According to the numerical date, the birth dates of father and son are different.
Zuo Zhuan also recorded an arithmetic application problem given by an old man to an official.
In 543 BC, Jin Duke's wife distributed relief food to the people of China, and an old man from Jiangxian came to collect it. When the official in charge asked him his age, he replied, "I'm just a humble citizen, and I don't know how to calculate my age." I only remember that I was born on the first day of the first month, which is a new day. So far, the 445th family has passed 1/3. "
The beadle didn't know how to calculate it, so he went to consult a senior official of the dynasty. The doctor said, "I see, it was 73 years ago when Di invaded Lu." Wenbo said, "Today is 26,660 days." That is, 444 times 60 and 0/3 of 65438+60 is 26660 days.
This story reflects that ordinary people at that time also have the memory of the date of birth, which is also the form of dry branches.
Maybe it's my sixth birthday.
The date of birth recorded by the main branch is not conducive to the concept of birthday.
First of all, the traditional calendar in China takes the moon's profit and loss cycle as January, combined with solar terms, which is a typical yin-yang calendar. Before the Warring States period, although the astronomical calendar could be arranged in advance, it often needed to be adjusted according to the actual astronomical phenomena because of the underdeveloped astronomy.
For example, one day is a dark day at the end of the month in the pre-arranged calendar, but there is a solar eclipse that day, which is actually a new moon next month (the day when the moon and the sun appear at the same time, which is strictly defined as the moment when the sun and the moon coincide with the yellow meridian in astronomy).
In the lunar calendar, the new moon is designated as the beginning of a month, so the government may modify the calendar and redefine the month it belongs to. If the date of next month is expressed in numbers, everything will change. In addition, before the Warring States period, the insertion of leap months was irregular. In this case, it is impractical to arrange the date in digital form.
Secondly, in the traditional calendar, a calendar month has only 29 or 30 days, but a calendar month has 60 days. This may lead to a situation where there is no fixed date for spending money for many years. If there is no Jiazi Day in September for five consecutive years, then this person may not have a birthday for six years.
This makes it inconvenient to determine a person's age by the date of birth. Therefore, people in China initially took the Lunar New Year as a life cycle measure to increase their age, and this tradition has continued to this day.
After the Han dynasty, the calendar has made great progress, and people can accurately calculate the calendar for many years to come according to the astronomical phenomena, which prepared the prerequisite for the emergence of digital calendars. In the Eastern Han Dynasty's Four-Person Moon Order, the digital date "July 4th" appeared.
During the Wei, Jin, Southern and Northern Dynasties, digital dates gradually became popular, and the concept of birthday came into being at this time. With the continuous improvement of the calendar, the date of each day can be reliably determined in advance, and the concept of taking years as the cycle of birthdays was formed in the Qi and Liang Dynasties.
Every integer multiple of 19. Lunar calendar and Gregorian calendar are the same day.
Corresponding to the lunar calendar is the Gregorian calendar. Gregorian calendar is a foreign thing to China people. So far, China has only used the Gregorian calendar 100 years.
Although the Gregorian calendar is widely used now, due to the deep-rooted influence of the lunar calendar on China people, when people mention their birthdays, they often remember both the birthdays of the Gregorian calendar and the lunar calendar.
There is an interesting 19 year cycle between Gregorian birthdays and China birthdays. For example, 1 984 65438+1October1is the lunar calendar165438+1October 29th, and the lunar calendar date after 19 is1/in 2003. This is mainly the result of the leap rules of two calendars.
The lunar cycle of the first month of the lunar calendar is 29.5306 days, which is generally "seven leaps in nineteen years", that is, 19 has 235 months. In this way, 19 lunar year has an average of 6939+0 days. The age of the current Gregorian calendar is 365.2422 days, and the average of 19 Gregorian calendar year is 6939.6075 days.
It can be seen that the number of days in 19 calendar year is almost equal to the number of days in 19 lunar calendar. Therefore, whenever the age is an integer multiple of 19, Gregorian birthdays and lunar birthdays are likely to completely coincide with birthdays before 19.
But this is not necessarily the case, because the leap between the lunar calendar and the solar calendar is not synchronized, and the difference between them may also be one day after 19. Especially just before birth, it happened to meet the lunar leap month, which may be even worse. For example, 1984 has a leap in October, and the lunar calendar date 1985 1 is1,and 19 is followed by 1 1 in 2004.
Birthday geometry is not directly related to fate.
When you ask a person's birthday, you will often ask the zodiac by the way. For today's young people, sometimes ask the constellation; For the elderly, they may pay more attention to "birthdays".
The zodiac is evolved from the chronology of animals. At first, the method of animal chronology was popular among nomadic people in northern China, and then it was combined with the method of stem and branch chronology, resulting in the theory of "Zodiac". Due to the early adoption of date and year in China, the moment of a person's birth also corresponds to a certain number, and then evolved into a "birthday."
"Birthday" and China Zodiac were originally a way for ancient China people to remember the date of birth. However, under the influence of ancient fatalism, "Birthday" and "Zodiac" were later painted with a thick layer of mystery, even mixed with superstition.
In fact, there are more than 10 million people born at the same time in the world, but their fate is good or bad, their life span is long or short, their life trajectories are different, and even the life trajectories of twins are different, which also shows that the so-called fate has nothing to do with the date of birth.
Others believe that birthdays are also closely related to solar terms. Nowadays, the relationship between birthdays and constellations, which are very popular among young people, is often mentioned. In fact, neither the constellation, the zodiac, the solar terms, nor the western birthdates can determine people's fate.
After all, it doesn't really matter when you celebrate your birthday. It is important to remind yourself on your birthday: "If you don't come back in your prime, it will be difficult to get up in the morning." Timely encouragement, time waits for no one. "
Baidu encyclopedia-times
China News Network-The ancients used to record birthdays, calculate ages and sometimes do application problems.