China's ancient book, "Spring and Autumn Fandanglu - yin and yang in and out of the upper and lower parts of the chapter," said: "Autumn equinox, yin and yang half also, so the day and night are even and the cold and heat are even." The word "equinox" means "half".
The autumnal equinox "autumnal equinox" has two meanings: first, the day and night time is equal, and by the long day and short night gradually short day and long night. The sun reaches 180 degrees of longitude on this day, directly on the Earth's equator, so the 24-hour day and night of this day, each 12 hours; the global phenomenon of extreme day and night. Second, the climate from hot to cool. According to China's ancient to spring, summer, autumn, winter for the beginning of the four seasons of the seasonal division of law, the Autumn Equinox in the 90 days of autumn, the equal division of the autumn.
Autumn equinox in the annual calendar September 22, 23 or 24, for the traditional Chinese festival of the twenty-four seasons, when the sun reaches 180 degrees of yellow longitude. Meaning of the autumnal equinox "moon order seventy-two wait collection": "August in the middle ...... solution to see the spring equinox". "The meaning of the equinox is that day and night are equally divided, and like the vernal equinox, the sun shines directly on the earth's equator on this day, and day and night are equal. Thereafter, the position of direct sunlight to the south, the northern hemisphere tends to be shorter days and longer nights, lower temperatures, in the country has universal significance. Autumn Equinox, "points" means "half". Autumn equinox, the global day and night equal length.
After the autumnal equinox, the day grows shorter and the night grows longer across the northern hemisphere, and the day grows longer and the night grows shorter across the southern hemisphere." Characteristics of the Autumn EquinoxThe Autumn Equinox is one of the more special of the twenty-four solar terms. Climate of Autumn Equinox During the Autumn Equinox, most parts of China have already entered the cool autumn, and the cold air coming south meets the gradually decaying warm and humid air, producing precipitation again and again, and the temperature drops again and again. As people often say, it's already time for "an autumn rain a cold", but the daily precipitation after the autumnal equinox will not be very large.
At this time, the south and north of the field cultivation is different. In northern China, there is a farming proverb that says, "White dew is early, cold dew is late, and it is the right time to plant wheat at the autumnal equinox." The proverb clearly specifies the time of sowing winter wheat in the region; and "the weather of the autumn equinox white clouds, everywhere good song good rice planting" reflects the time of sowing rice in Jiangnan region. In addition, the working people of the autumnal equinox taboo is also summed up in proverbs, such as "the autumnal equinox is only afraid of thunder and lightning flash, more expensive how to come to the price of rice".