Traditional numerology tells us that the sun is a big joke in the world. The solar term of rain in 24 solar terms tells us that this statement is wrong.

Wood fire is not the sun, but the fire of the lunar calendar moon, and wood fire is the fire of the sun. Because twenty-four qi belongs to the genus of swallowing yin, generally speaking, it is less about birth suppression, and twenty-four qi is transformation, so the restraint on life is infinite, but it is the fundamental aspect, such as fate, yin house, yang house and birth punishment.

Twenty-four solar terms are special festivals in the dry calendar to express seasons, phenology, climate change and establish "December construction" (festival). Initially, it was determined by the direction of rotation of the Big Dipper bucket handle. The Big Dipper rotates circularly, and bucket handle rotates around the east, south, west and north for one cycle, and each rotation cycle starts in beginning of spring and ends in the Great Cold.

The current "twenty-four solar terms" are divided by the method of "fixing qi", that is, the solar terms are determined according to the position of the sun on the ecliptic; The "fixed space method" divides the sun's trajectory in one year into 24 equal parts, each 15 is 1 equal part, and each 1 equal part is a solar term, starting from the beginning of spring and ending in the great cold. "Twenty-four solar terms" is an important part of the long history and culture of the Chinese nation, which embodies the historical and cultural essence of Chinese civilization.

"Twenty-four solar terms" is the product of ancient farming civilization, and farming production is closely related to the rhythm of nature. It is a knowledge system formed by ancient ancestors following the farming season, observing the movement of celestial bodies and understanding the changing laws of seasons, climate and phenology throughout the year. "Twenty-four solar terms" not only play a guiding role in agricultural production, but also affect the basic necessities of life and even cultural concepts of ancient people.

Through historical development, the lunar calendar absorbed the solar terms of the dry calendar as a supplement to the calendar, and adjusted it to conform to the tropic year through the leap method, forming a combined calendar of yin and yang, and the "twenty-four solar terms" became an important part of the lunar calendar. In the field of international meteorology, the 24 solar terms are known as "the fifth invention of China". 2016165438+1October 30th, 24 solar terms were officially listed in UNESCO's Representative List of Intangible Cultural Heritage of Humanity.

Rain is the second of the 24 solar terms. Fight with your fingers; The sun reaches longitude 330; February 18-20 of the Gregorian calendar every year. Rain, like solar terms such as Grain Rain, Xiaoman, light snow and heavy snow, is a solar term reflecting precipitation and ancient farming culture. Rainwater solar terms mark the beginning of rainfall and the gradual increase of rainfall. As the saying goes, "Spring rain is as expensive as oil", and suitable precipitation is very important for the growth of crops. Entering the rain solar term, the northern part of China is still cloudy and cold, and it is still snowing in some places, but it is still very cold before the spring; Most places in the south are full of spring, with a scene of early spring.

After the solar term rain, the direct point of the sun gradually approaches the equator from the southern hemisphere. At this time, the sunshine hours and intensity in the northern hemisphere increased, and the temperature rose rapidly. Warm and humid air from the ocean began to be active and gradually pushed northward, and the rainfall gradually increased, but the rainfall level was mainly light rain or Mao Mao rain. In China climatology, beginning of spring is usually defined as the day when the daily average temperature is stable above 10℃ every five days.