When is the autumnal equinox

The autumnal equinox is one of the 24 solar terms. The arrival of the autumnal equinox indicates that autumn is getting stronger and stronger, indicating that most parts of China have entered a cool autumn, and then the temperature gradually drops and becomes colder. The date is between September 22 and 24 of the Gregorian calendar every year. In the autumn equinox season, we should pay special attention to preventing autumn dryness, and the most important thing is to fully replenish water. In terms of diet, it is mainly moist, and we should eat more moist foods such as sesame seeds, walnuts and glutinous rice. With the approval of the CPC Central Committee and the State Council, since 20 18, the annual autumnal equinox has been established as "China Farmers Harvest Festival".

solar term

China's ancient book "Spring and Autumn Stories, Yin and Yang in and out" said: "The autumn equinox, Yin and Yang are also half-phase, so it is cold and hot day and night." The autumnal equinox means "half" "Equinox" has two meanings:

First, day and night are equal. On this day, the sun reached the longitude 180 degrees, and directly hit the equator of the earth. Therefore, in most parts of the world, the 24 hours a day are equally divided, each being 12 hours. After the autumnal equinox, the direct point of the sun began to enter the southern hemisphere from the equator, and the northern hemisphere began to have shorter days and longer nights, and shorter days and shorter nights in a day; Near the North Pole, there are long nights and stars for six months in a year.

Second, the climate changed from hot to cold. According to the division of seasons in ancient China, which started with beginning of spring, Changxia, beginning of autumn and beginning of winter, the autumnal equinox is divided into 90 days in autumn and divided equally in autumn.

The autumnal equinox is one of the 24 solar terms of traditional festivals in China. On September 22nd, 23rd or 24th of Gregorian calendar, the sun reaches 180 degrees. The meaning of the "twenty-four solar terms" in the autumnal equinox: "See the vernal equinox in mid-August". "Divide" means to divide day and night equally. Like the vernal equinox, the sun shines directly on the equator of the earth on this day, and day and night are equal. From then on, direct sunlight began to enter the southern hemisphere, and the northern hemisphere began to have shorter days and longer nights, and the temperature dropped, which was of universal significance throughout the country. At the autumnal equinox, "fen" means "half". At the autumnal equinox, most parts of the earth are equally divided day and night, each with 12 hours; Near the North Pole and South Pole, the sun can be observed on the horizon all day on this day. After the autumnal equinox, the days in the northern hemisphere are short and the nights in the southern hemisphere are long. The characteristics of the autumnal equinox The autumnal equinox solar terms are special among the 24 solar terms.