What does the autumnal equinox mean? When is the autumnal equinox?

What does the autumnal equinox mean? The autumnal equinox is the fourth solar term in autumn.

The autumnal equinox is the sixteenth solar term among the twenty-four solar terms in China and the fourth solar term in autumn. At this time, the sun reaches180; Every year on September 22-24 of the Gregorian calendar, on the day of the autumnal equinox, the sun shines almost directly on the equator of the earth, and the whole world is as long as day and night; In the autumnal equinox, "fen" means "equally divided" and "half divided", mainly referring to the equal division of day and night. After the autumnal equinox, the position of direct sunlight moves south, the days in the northern hemisphere are shorter and the nights are longer, the temperature difference between day and night increases and the temperature drops day by day.

What date is the autumnal equinox? It mainly occurs between September 22nd and 24th every year, and the autumnal equinox of 202 1 falls on September 23rd.

The time of autumnal equinox is different, mainly because for the same solar term, it is 6 hours or 5 hours later than the previous year, and 24 hours earlier in leap year. The date reflects that the same solar term remains unchanged in normal year or is later than the previous year 1 day; The leap year remains unchanged or is earlier than the previous year 1 day.

What does 202 1 beginning of autumn mean? Beginning of autumn mainly refers to the arrival of autumn.

Beginning of autumn is also one of the 24 solar terms in China, with 13 of the 24 solar terms and the first solar term in autumn. On August 7-9 every year, the bucket handle of the Big Dipper points southwest, and the sun reaches longitude 135. At this time, the yang gradually closes and the yin gradually grows, and the yang gradually becomes the node of the yin. Beginning of autumn means the arrival of autumn.

What's the difference between the autumnal equinox and beginning of autumn? There are mainly the following differences:

The time in beginning of autumn is different. beginning of autumn is 13 of the 24 solar terms, which is around August 7-9 every year. The autumnal equinox is the first 16 of the 24 solar terms, which falls on September 22-24 of the Gregorian calendar every year.

When the sun is located at different autumnal equinoxes, the sun reaches 180, and the northern and southern hemispheres are equally divided. In early autumn, the bucket handle of the Big Dipper points southwest, and the sun reaches longitude 135.

Beginning of autumn with different climatic characteristics mainly refers to the arrival of autumn, when the weather is getting colder, but it is still in the dog days and the weather is hot; At the autumnal equinox, most parts of China became cold, and the temperature dropped.

Third class is different. Beginning of autumn's third class is: "Wait for the cool wind; Second, wait for the white deer to be born; Third-class chilling. " ; The three stages of the autumnal equinox are: "Wait for the thunder to stop; Second, wait for scorpion blank households; Wait until the water is dry. "