What season is after the autumnal equinox?

The sixteenth solar term of the twenty-four solar terms in the lunar calendar is usually from September 22nd to 24th in the Gregorian calendar. The climate in the south began to decline from this solar term. First, the sun arrived at 180 (autumnal equinox) on this day, and the sun almost directly hit the equator of the earth, and the length of day and night is equal all over the world (regardless of the refraction of sunlight by the atmosphere and the shadow in the morning).

On June 2nd, 2065438, the State Council issued an official reply on the establishment of "China Farmers Harvest Festival", agreeing to establish the annual Spring Equinox of the Lunar New Year as "China Farmers Harvest Festival" from June 20th, 2065438.

Extended data 24 solar terms

According to the law of the operation of heaven and earth, the ancients determined the starting point and ending point of the four-season cycle and divided the 24 solar terms. The trajectory of the sun in a year is divided into 24 equal parts, each of which is a "solar term", collectively called "twenty-four solar terms". Twenty-four solar terms represent twenty-four different positions of the earth in the orbit of revolution.

Because it takes 365 days for the earth to go around the sun, there is a solar term every fifteen days, and each solar term represents different changes in climate, phenology and time. The spring rain shakes the spring and clears the valley, and the summer is full of mountains and summers. Autumn dew, autumn frost, little snow in winter and cold in winter. The solar term song, which is well known to China people, implies the order of the 24 solar terms.

All the year round begins with "four stands", and the so-called "stand" is the beginning. Beginning of spring, Changxia, beginning of autumn and beginning of winter represent the beginning and arrival of spring, summer, autumn and winter respectively. In order to express the characteristics of time series more accurately, the ancients divided the solar terms into four groups according to the weather and phenology: divided, arrived, opened and closed.

"Fen" means vernal equinox and autumnal equinox, which was called "dichotomy" in ancient times; "Solstice" is the summer solstice and the winter solstice, which was called "the second solstice" in ancient times. "Qi" refers to beginning of spring and Changxia, "Closed" refers to beginning of autumn and beginning of winter, and beginning of spring, Changxia, beginning of autumn and beginning of winter are collectively called "Sili", which add up to * * * to "eight sections". Corresponding to the most important "eight festivals" in the solar terms. If you choose the key points in the eight sections, it is the "second solstice" of the summer solstice and the winter solstice.

Baidu encyclopedia-autumnal equinox