When is the autumnal equinox?

The autumnal equinox is September 23rd.

The autumnal equinox is the midpoint of three months (about 90 days) in autumn. "Fen" in "Autumn Equinox" means "half". The autumnal equinox is after September 23rd of the Gregorian calendar every year, and the earth reaches longitude 180 degrees. On this day, the sun shines almost directly on the equator of the earth, and the length of day and night is equal all over the world. In the autumn equinox, most parts of China have entered a cool autumn. The cold air from the south meets the gradually decaying warm and humid air, which causes repeated precipitation and the temperature drops again and again.

The autumnal equinox is the sixteenth of the twenty-four solar terms. On the autumnal equinox, day and night are equal, and then the longer the night, the shorter the day. After the autumnal equinox, the direct point of the sun continued to move from the equator to the southern hemisphere, and the days in the northern hemisphere began to shorten and the nights became longer, that is, the days in a day began to be shorter than the nights; The southern hemisphere is the opposite. The autumnal equinox used to be the traditional "Festival of Sacrificing the Moon". For example, in ancient times, there was a saying that "the sun is sacrificed in spring and the moon is sacrificed in autumn". Mid-Autumn Festival comes from the traditional Mid-Autumn Festival.

Autumnal equinox custom:

1, eat autumn vegetables in the autumn equinox

In Lingnan area, there is an unbroken custom in Cangcheng Town, Kaiping, which is located in Siyi (now taking Heshan as Wuyi) and is called "eating autumn vegetables at the autumn equinox". "Autumn vegetable" is a kind of wild amaranth, which villagers call "autumn Artemisia". On the autumnal equinox, the whole village went to pick autumn vegetables. When searching in the wild, it is often green and thin, about the length of a palm. Picked autumn vegetables are usually boiled with fish fillets at home, which is called "autumn soup".

2, vertical egg custom

Every autumn equinox, tens of millions of people all over the world are doing "vertical egg" experiments. How can this "China custom" become a "world game"? Its play is simple and interesting: choose a smooth and symmetrical fresh egg that has just been born for four or five days, and gently stand it up on the table. Although there are many losers, there are also many winners.

Baidu encyclopedia-vernal equinox