What does it mean to leap into adulthood?

"Leaping into adulthood" is the main content of the ancient lunar calendar, saying "Shangshu?" Yao Dian "set the age at four o'clock in the leap month". Accumulate the leap surplus for many years to one month and put it in a normal year; The ancients used six laws and six laws to regulate yin and yang. In China, the lunar calendar uses the "Yin-Yang calendar". The solar calendar, also known as the solar calendar, is a lunar calendar based on the exercise and fitness cycle around the sun on the earth. In the past, the solar calendar was similar to the tropic year, one year 12 months. This "moon" actually has nothing to do with the moon. The month and date of the solar calendar coincide with the position of the sun on the old yellow calendar.

According to the date of the solar calendar, you can clearly see the changes of the four seasons in a year, but in each month, you can't see the new moon, moon and two strings. At present, the Gregorian calendar used for driving in society is a kind of solar calendar, with 365 days in an average year and 366 days in an average year. Once every four years, once less in the last hundred years, and once again in the 400th year, that is, there are 97 normal years every 400 years. The difference between the total length of the previous Gregorian calendar and the tropic year is only 26 seconds, and it takes only one day to accumulate 3300 years. Astronomy is the earliest and most systematic part of China's cultural tradition. Before the Ming Dynasty, astronomy in China was the cutting-edge technology in the world, and it was a part of China's traditional innovative technology.

Because China's agricultural industry is Kangtong and agriculture is the core, farming is not a mistake at all in China. Spring grows in summer and autumn harvests in winter. We must press the sky, not the heart. Therefore, there have been celestial supervisors and "celestial officials" in China in the past dynasties, and technical professionals have observed the changes of astronomical climate. Therefore, as the basis of administrative treatment, they collectively call the sun, the moon and the five stars "seven houses". One year is 1 1 day, three years and 33 days, leaving one month vacant. In that case, the lunar calendar does not conform to the phenological law, and it will snow in June in seventeen years. What do we do? We only put one more month every three years, so the extra month is called leap month, and the year with leap month is called normal year.

Twelve months a year on average, thirteen months a year on average. Increase the month of steam leakage in Zhu Gui. Twenty-four solar terms have 12 knots and 12 qi, which are divided into one qi on average every month. For example, beginning of spring is the first month of festivals, and the rainfall is the first month. There is a daily difference between the monthly law and the annual law of the lunar calendar. Three years later, there will be a month when bamboo leaks rain, so this month we added a leap. So reading history, sometimes in August, sometimes in1February, is different. It took three years to absorb and digest for 30 days, and there are still three days left. Two leaps in five years, not enough days. Later, it was found that it was best to jump seven times in nineteen years.