What does the meaning of the autumnal equinox mean, and what does the autumnal equinox mean

Autumnal equinox

The autumn equinox is the sixteenth of the 24 solar terms and the fourth solar term in autumn. Dou Zhi You; The sun reaches 180° ecliptic longitude; It is held on September 22-24 of the Gregorian calendar every year. On the day of the autumnal equinox, the sun shines almost directly on the Earth's equator, and the length of day and night is equal across the globe.

Autumnal equinox"points"That is"Deuce"、"Half"In addition to referring to the equal division of day and night, there is also a layer of meaning that the autumn is equally divided. After the autumnal equinox, the position of direct sunlight shifts southward, and the days in the northern hemisphere are shorter and the nights are longer, the temperature difference between day and night increases, and the temperature decreases day by day.

The autumnal equinox used to be traditional"Moon Festival", the Mid-Autumn Festival by"Autumn festival moon"evolved. On June 21, 2018, *** agreed to establish"Chinese Farmers' Harvest Festival"It was agreed that from 2018 onwards, the autumn equinox will be established every year"Chinese Farmers' Harvest Festival"。

The autumnal equinox, the sixteenth of the 24 solar terms in the lunar calendar, generally falls on September 22 and 24 of the Gregorian calendar every year. The climate in the south begins with this solar term before autumn. The first is that the sun reaches 180° of ecliptic longitude (autumnal equinox) on this day, and the sun shines almost directly on the earth's equator, and the day and night are equal in length around the world (not considering the refraction of sunlight by the atmosphere and the shadow of morning and dusk).

After the autumnal equinox, the direct point of the sun continues to move from the equator to the southern hemisphere, and the days and nights begin to be shorter and longer in the northern hemisphere, that is, the days begin to be shorter than the nights in a day. The Southern Hemisphere is the opposite. Therefore, the autumn equinox is also called the descending equinox.

"Autumn equinox" has two meanings:

First, the time of day and night is equal, and the days and nights are gradually shorter and the nights are longer. On this day, the sun reaches 180 degrees of ecliptic longitude and shines directly on the Earth's equator, so the 24-hour day and night on this day are evenly divided, 12 hours each; The global phenomenon of infinite diurnal and nocturnal.

Second, the climate has changed from hot to cool. According to the ancient Chinese division method of starting with the beginning of spring, the beginning of summer, the beginning of autumn, and the beginning of winter, the autumn equinox is among the 90 days of autumn, and the autumn is equally divided.

Autumnal Equinox Interpretation:

One of the 24 solar terms, on the 24th of September.

On this day, the day and night are as long as night in the northern and southern hemispheres

The autumnal equinox has two meanings, one refers to the equinox of autumn, and the other refers to the equinox of day and night.

The autumnal equinox solar term is not only an important agricultural solar term of the Autumn Newspaper Society, but also develops the connotation of celestial worship with the theme of loving life, and also shows the efforts of the ancient Chinese to conform to the seasons and construct social order. In this connotation of solar terms, we fully understand the ancient Chinese people's respect for nature and love for life.

The autumn equinox is one of the four major solar terms along with the spring equinox, summer solstice, and winter solstice, and is the 16th of the 24 solar terms and the fourth solar term of autumn. The word "autumnal equinox" has two meanings, one refers to the equinox, that is, by the time of the autumnal equinox, the autumn is already halfway over; The two fingers equinox day and night, when the sun travels on the ecliptic to 180° of ecliptic longitude, the sun's rays almost directly hit the equator, and most of the earth has equal day and night.

The autumn equinox is a rather complex solar term, involving agriculture, astronomy, personnel and many aspects, which concentrates on the attitude and emotions of Chinese people who respect nature and love life.

First of all, it is a very important agricultural solar term, which is the busy season of autumn harvest, autumn planting and autumn ploughing. On the one hand, the autumn equinox is the harvest time for most crops, such as rice, corn, sorghum, soybeans and sweet potatoes in Northeast China, which begins to harvest rice, corn, sorghum, soybeans and sweet potatoes at the autumn equinox, while autumn harvest farming in North China is nearing the end. On the other hand, the autumn equinox is also the sowing time for winter wheat and other crops, and there is a proverb in North China that says: "The white dew is early, the cold dew is late, and the autumn equinox is the right time to plant wheat."

The autumn equinox is also the key moment for double-cropping late rice in many places in the south to be heading and flowering, and it is necessary to step up field management when determining whether it can achieve high yield. Therefore, there is an agricultural proverb that says: summer is busy for half a month, and autumn is busy for forty days.

The autumnal equinox is the sixteenth of the 24 solar terms, and the time is generally September 22 and 24 in the Gregorian calendar every year. On the day of the autumnal equinox, the sun reaches 180° of ecliptic longitude (the autumnal equinox), almost directly hitting the Earth's equator, and the day and night are equal in length around the world (not taking into account the refraction of the sun's light and the shadow of morning and dusk in the atmosphere). In ancient times, there was a folk activity of "spring festival day, autumn festival moon", and the autumn equinox was the traditional "moon festival" (Mid-Autumn Festival), and the Mid-Autumn Festival evolved from the autumn and evening moon festival.