autumnal equinox is the fourth solar term of autumn. During this period, the sun shines directly on the equator, resulting in the equinox of day and night in all parts of the world, that is, the length of day and night is the same. What month and day is the autumnal equinox in 2020? Next, let the old yellow calendar take you to learn more about it.
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Q: what month and day is the autumn equinox in 2020? A: the 2020 autumnal equinox is the time of the Gregorian calendar: 21:30:32 on September 22, 2020, and Tuesday on the lunar calendar: Tuesday, the sixth day of August, 2002. What doesand
mean by the autumnal equinox? The ancient Chinese book "spring and autumn numerous dew · Yin and Yang in and out part I and part II" says: "the autumnal equinox is half Yin and Yang, so the day and night are both cold and heat flat." the "equinox" means "half". "Autumnal equinox" has two meanings: first, the time of day and night is equal, and gradually from day to day and night to day and night. On this day, the sun reaches 180 degrees of the Yellow meridians and goes straight to the equator of the earth. Therefore, the 24 hours of this day in most parts of the world are divided into 12 hours day and night; Near the north and south poles, the special phenomenon of "the sun circling on the horizon all day" can be observed on this day. Second, the climate changes from hot to cold. According to the division of seasons in ancient China, which began with the beginning of spring, summer, autumn and winter, the autumnal equinox ranks among the 90 days of autumn, and the autumn is divided equally. The meaning of the autumnal equinox "the collection of the seventy-two seasons of the moon": "in August... See the spring equinox". "Fen" means the equinox of day and night. Like the spring equinox, the sun shines directly on the earth's equator on this day, and day and night are equal. Since then, the direct sunlight position began to enter the southern hemisphere, the northern hemisphere began to have short days and long nights, and the temperature decreased, which is of universal significance in the country. On the autumnal equinox, "Fen" is "half". At the autumnal equinox, day and night are equally divided in most parts of the earth for 12 hours each. Near the north pole (90 ° north latitude) and the south pole (90 ° south latitude), the special phenomenon of "the sun circling on the horizon all day" can be observed on this day. After the autumnal equinox, the days are short and the nights are long in the northern hemisphere and long and short in the southern hemisphere.
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autumnal equinox farming and rapid cooling in autumn make the "three autumn" of autumn harvest, autumn tillage and autumn planting "The rush is particularly tense. Cotton bolls and tobacco leaves turn from green to yellow at the autumnal equinox, which is a good time for harvest. Winter wheat has been sown in North China, and the Yangtze River Basin and the vast areas in the south are busy harvesting late rice, seizing sunny days, ploughing the land and preparing rape for sowing. Drought and little rain or continuous cloudy rain at the autumnal equinox affect the" three autumn " "The main unfavorable factors for normal operation, especially the continuous rain, will cause the crops to fall, mildew or sprout, causing serious losses." the "busy, precious" of the third Autumn Festival is early "Word. Timely harvest of autumn crops can avoid the harm of early frost and continuous rain. Timely and early sowing of winter crops can strive to make full use of the heat resources before winter, cultivate strong seedlings and survive the winter safely, so as to lay the foundation for high yield in the coming year." the autumn equinox does not appear, and the old cattle are cut and fed. "The double cropping late rice in the south is heading and flowering, which is a key period for yield formation. It is formed by early low temperature and rain." The cold weather at the autumnal equinox is the main threat to the flowering and Fruiting of double nights, so we must do a good job in forecasting and defense.
the autumnal equinox is a solar term for cooling down. As the saying goes, "the autumnal equinox is cool at night "On the autumnal equinox, the sun shines directly at the equator and then begins to move to the southern hemisphere. The solar heat obtained on the ground in the northern hemisphere gradually decreases, and the average temperature in mainland China also decreases by a large margin, and the weather gradually turns cool. Like the warming in spring, the cooling in autumn is also the largest in northern Guangdong. This is because, on the one hand, the average temperature in northern Guangdong is higher in summer, on the other hand On the other hand, the northern region of Guangdong has been affected by the cold air in the north in autumn, while the southern region is a little later. Even if there is cold air, its intensity is small. In the autumnal equinox solar term, the average temperature in northern Guangdong decreases by 2.5'c, while that in the southern region only decreases by about 1.5 ℃. During the autumnal equinox, the impact of typhoon is less than that of Bailu, but it is still the peak period of typhoon activity, but during this period, Guangdong The strong winter wind in the mainland of Guangdong Province prevented some typhoons from landing in Guangdong Province, and some weakened directly at sea, so most typhoons landed on Hainan Island at this time. Because there are few opportunities for typhoons to land in Guangdong Province, the rainfall in most parts of the province has also decreased sharply in addition to western Guangdong. In this way, after northern Guangdong, eastern Guangdong and the Pearl River Delta have gradually entered the dry season.
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" There are three seasons at the autumnal equinox. The ancients used the transformation of yin and yang to explain the changes of cold and heat in the climate, and the autumnal equinox is the key node of the transformation of yin and Yang in a year. Lei is the representative of Yang Qi, and the beginning of the sound of Lei means that Yang Qi begins to decline, and Yin Qi gradually occupies a dominant position. Reflected in the external climate change, naturally, autumn is getting thicker and the temperature is gradually decreasing. As the weather began to get cold, the dormant insects began to close their caves with soil to resist the invasion of the cold. The water began to dry up in the third season. Since autumn, the precipitation in the North began to decrease significantly. After the autumn equinox, after the last wave of typhoon rainfall, the South began to enter a period of little rain In short, before and after the autumnal equinox, most parts of China can already feel a strong sense of autumn, which can be described as high and crisp autumn, fragrant osmanthus, crab fat and chrysanthemum yellow. However, while enjoying the beautiful scenery and delicious food, we should also pay attention to increasing clothes in time to avoid catching cold.
Autumnal equinox food folk custom autumn is the harvest season. How can you forget to eat at such a beautiful time? In some places in Lingnan, China, there is "eating autumn vegetables" at the autumnal equinox "The custom of eating autumn vegetables. However, this is not for food, but represents a beautiful wish. The so-called autumn vegetables are actually wild amaranth growing in Lingnan area. Locals call it" autumn green Artemisia ", which is slender, tender and green, about the length of a palm. Locals go up the mountain to pick autumn vegetables on the autumn equinox, and boil them into soup with fish fillets when they go home, which is called" Autumn soup ". There is a folk saying in Lingnan area:" autumn soup fills the viscera and washes the liver and intestines. The whole family, old and young, is safe and healthy. "Of course, from the perspective of scienceFrom the point of view, this wild amaranth is rich in carotene and vitamin C, which has the effect of enhancing human immunity. Eating "autumn soup" also obscures the concept of autumn tonic in traditional Chinese medicine, which is still very reasonable.
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