What are the four seasons?

The origin of the twenty-four solar terms originated in the Yellow River Basin. As early as the Spring and Autumn Period, four solar terms were set, namely, mid-spring, mid-summer, mid-autumn and mid-winter. After continuous improvement and perfection, by the Qin and Han Dynasties, the 24 solar terms had been completely established. In BC 104, the taichu calendar written by Deng Ping officially set 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms. The time when the sun runs along the longitude of the Yellow River from zero 15 degrees is called "a solar term". It runs 360 degrees every year, and * * * experiences 24 solar terms, twice a month. Among them, the first solar term of each month is "solar term", that is, beginning of spring, Jingzhe, Qingming, Changxia, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Hanlu, beginning of winter, Heavy Snow, Xiaohan, etc. 12 solar terms; The second solar term of each month is "Zhongqi", that is, there are 12 solar terms such as rain, vernal equinox, Grain Rain, Xiaoman, summer solstice, great heat, intense heat, autumnal equinox, first frost, light snow, winter solstice and great cold. "Solar term" and "neutral qi" appear alternately, each lasting 15 days. Now people have called "solar terms" and "neutral gas" solar terms. Twenty-four solar terms reflect the apparent movement of the sun in one year, so the dates of solar terms are basically fixed in the current Gregorian calendar, with the first half of the year being 6 days and 2 1, and the second half being 8 days and 23 days, with a difference of 1 ~ 2 days. In order to facilitate memory, people have arranged 24 solar terms: spring rain, song Jing, spring and clear valley days, summer full and summer hot, autumn cold and frost falling, and winter snow falling. The earth goes around the sun, and it takes a year to complete a circle. A year is divided into December, and the 24 solar terms are closely linked. According to the Gregorian calendar, these two gases will not change every month. The first half of the year is Saturday and Monday, and the second half is every eight days and every Wednesday. These are festivals, and the difference is only one or two days. In the twenty-fourth section, I remember the following formulas in my mind: a slight cold followed by a severe cold in January, and a rainy day in beginning of spring in February; The vernal equinox is in March and Qingming Grain Rain is in April. Long summer and full summer in May, full summer solstice in June; July is hot and slightly hot, and August is long summer, beginning of autumn; In September, the Millennium meets the autumnal equinox, and the first frost and cold dew are all in October; There is a light snow in 1 1 month in beginning of winter, and a heavy snow in winter solstice to welcome the New Year. Grasp the season and busy production, sow and harvest in time to ensure a bumper harvest. With the spread of China calendar, the 24 solar terms have spread to many parts of the world. Beginning of spring: beginning of spring is standing, and beginning of spring is beginning of spring. Rain: It began to rain and gradually increased. Sting: Sting means hiding. Sting refers to the sudden movement of spring thunder, which awakens the hibernating animals in the soil. Equinox: Equinox means equal share. The vernal equinox means that day and night are equally divided. Qingming: sunny and lush. Grain Rain: Rain makes a hundred valleys. With sufficient and timely rainfall, cereal crops can thrive. Long summer: the beginning of summer. Xiaoman: Summer crops such as wheat are full of seeds. Miscanthus species: Miscanthus crops such as wheat are mature. Summer solstice: The hot summer is coming. Summer heat: Summer heat means heat. Slight summer heat refers to when the climate begins to get hot. Big institutions: the hottest time of the year. Beginning of autumn: The beginning of autumn. Summer heat: place means stop and hide. Summer is the end of hot summer. White dew: The weather turns cold and the dew condenses into white. Autumnal equinox: divided equally between day and night. Cold dew: Dew is cold and will freeze. First frost: it's getting colder and colder, frosty. Beginning of winter: The beginning of winter. Xiaoxue: It's starting to snow. Heavy snow: the snowfall is increasing, and there may be snow on the ground. Solstice of winter: the cold winter is coming. Slight cold: The climate began to get cold. Great cold: the coldest time of the year. Twenty-four solar terms, beginning of spring season begins in spring, February 3-5, February 18-20, March 5-7, spring equinox March 20-22, Tomb-Sweeping Day April 4-6, Grain Rain April 19-2 1 day, and long summer season begins. From the summer of June 5-7 to the summer of June 2 1-22, the summer of July 6-8, the autumn of July 22-24, the summer of August 7-9, the summer of August 22-24, the autumn equinox of September 7-9, and the cold dew of September 22-24 65438+1. On March 23rd-24th, winter begins on July 7th-8th winter 165438+, with light snow 65438+ on February 22nd-23rd, heavy snow 65438+ on June 6th-8th, and winter solstice 65438+ on March 23rd. 1 Day Section Twenty-four solar terms: clear valley days in early spring in Song Chunyu, summer mountains and summer lotus flowers, autumn dew and frost, and snowy winter. The two festivals have not changed every month, with a difference of one or two days at most. The first half of the year is June 2 1 day, and the second half is August 23. The meaning of the twenty-four solar terms is the original cultural heritage of the working people in China, which can reflect the changes of seasons, guide agricultural activities and affect the food, clothing, housing and transportation of thousands of households. Since 2000, the main political activity center in China has been concentrated in the Yellow River Basin, and the 24 solar terms have been established on the basis of the climate and phenology in this area. Due to the vast territory and changeable terrain of China, the 24 solar terms are only a reference for many regions. Light snow, heavy snow-it's starting to snow, with small and large indicating the degree of snowfall. Light snow falls on Gregorian calendar165438+1October 22nd, and heavy snow falls around 65438+February 7th. Slight cold, severe cold-the weather is getting colder and colder. Slight cold is not the coldest, but severe cold is the coldest time of the year. The Gregorian calendar 65438+1October 5th and 20th are mild and severe cold. Knowing the meaning of the 24 solar terms will be helpful to your daily life.