When is spring?

Beginning of spring is also known as Da Chun. Beginning of spring time is not fixed every year. It's usually February 3rd, 4th or 5th.

Beginning of spring is the first of the 24 solar terms. Beginning of spring solar terms are calculated by precise astronomical calculation according to the law of fixing qi in the calendar. During the solar term in beginning of spring, the sun reached 365,438+05 degrees. The trunk calendar is divided into twelve months and twenty-four solar terms, each month contains two solar terms, and there is no leap month.

Extended data:

Beginning of spring, the first of the 24 solar terms, is also called the Lunar New Year, the first lunar month, the establishment of the Spring Festival, the beginning of a year and the beginning of a year. In ancient times, the method of "bucket handle Acupoint" used bucket handle and the Big Dipper in beginning of spring to point to Yin. The current method of "fixing qi" divides solar terms, and the vernal equinox begins when the sun reaches longitude 3 15. Beginning of spring means the beginning of a new cycle, which is the beginning of everything and the meaning of all self-renewal. Standing means "start"; Spring represents warmth and growth.

In the era of main branches, beginning of spring is the beginning of a year, and beginning of spring is the beginning of spring and the beginning of a year. Before the Qin and Han Dynasties, the focus of etiquette and customs was not on the beginning of January (the first month of the lunar calendar), but on the beginning of spring. The main worship of gods and ancestors, prayers for the New Year, welcoming spring and agricultural celebrations are arranged at the beginning of spring and a few days before and after; This series of festival activities not only constitutes the framework of the New Year's Eve Festival in later generations, but also retains its folk function to this day.

As one of the "twenty-four solar terms", beginning of spring, like Changsha, beginning of autumn and beginning of winter, reflects the changes of all seasons. Due to the vast territory of China, the climate varies greatly from place to place. The specific climatic significance of "Li" does not apply to all parts of the country, and the corresponding area is only South China, with the dividing line from Guilin, Guangxi to Ganzhou, Jiangxi.

Beginning of spring time (when the daily average temperature reaches 10 degrees Celsius for five consecutive days, it is regarded as spring), and the area south of the line has the breath of spring; However, 93% of China's land area is still in winter, and when it comes to Heilongjiang, it is often in the long summer, and spring comes in Grain Rain. "Li" is just a reference in many areas.

Beginning of spring solar terms meaning:

Beginning of spring is one of the "24 solar terms" in the Ganzhi calendar. The "Twenty-four solar terms" were originally determined by the direction of the top of the bucket handle of the Big Dipper. At the age of one (year), bucket handle turns to "Twelve Chens" in turn, which is called "December Building" (or "December Order"), and "Building" represents the direction of the top of the bucket handle of the Big Dipper;

Bucket handle turns from due east to north (yin position, acquired gossip position), east, south, west and north, refers to ugly side at the end of December, and returns to yin position in the first month, so "bucket handle returns to yin position" is spring positive; "bucket handle Yin Hui" refers to the beginning of everything and the rebirth of everything. When the barrel handle points to the shade, it is beginning of spring, which means a new cycle has begun.

The current "twenty-four solar terms" are determined according to the "constant air method" (which has been used since 1645), and the "constant air method" divides the "twenty-four solar terms", and each solar term corresponds to a certain position that the earth reaches every 15 years on the ecliptic, reflecting the influence of the sun on the earth. The earth's orbit around the sun was named "ecliptic" by the ancients, also known as "solar ecliptic". It was divided into 24 equal parts, separated by 15.

, it formed the twenty-four solar terms.

24 solar terms is actually 24 solar terms, with 2 solar terms per month. By observing the laws of astrology, the ancients understood the changing laws of seasons, climate and phenology in a year, and the knowledge system and social practice formed in the 24 solar terms. When the sun reaches longitude 3 15, it is the node of beginning of spring, which is on February 3-5 in Gregorian calendar.

Climate change in early spring:

Beginning of spring is not only the first of the 24 solar terms, but also in nature and people's minds, spring means warm weather, flowers and birds, the growth of all things and the sowing of spring. The so-called "one year's plan lies in spring". In climatology, spring refers to the period when the average temperature is between 10℃ and 22℃. Speaking of beginning of spring, people obviously feel that the days are getting longer and the sun is getting warmer. Temperature, sunshine and rainfall are often at the turning point of the year and tend to rise or increase.

Beginning of spring solar terms began, westerly jet, the southern branch of East Asia, began to weaken, and the winter climate was coming to an end. However, the intensity and location of the northern branch of westerly jet remain basically the same, the Mongolian cold high and Aleutian low are still relatively strong, and gale cooling is still the prevailing main weather. However, during the intermission under the influence of strong cold air, the frequency of southerly winds increases, accompanied by an obvious warming process.

Baidu Encyclopedia-beginning of spring