What does the spring equinox mean, and what does the autumn equinox mean

The spring equinox and autumn equinox, the length of day and night are roughly equal, and they are equally divided.

Spring equinox, autumn equinox, "fen" is the meaning of "equinox", "half", in addition to referring to the equinox of day and night, there is also a layer of meaning that the spring **, autumn.

There are four seasons in a year: spring, summer, autumn, and winter. In terms of temperature, summer and winter are two extremes, one is extremely hot and the other is extremely cold.

Spring and autumn are similar, with average temperatures being more pleasant. But from the perspective of temperature changes, the temperature in spring is from low to high, while in autumn the temperature is from high to low.

Reversing refers to the deduction of the development process of a thing in the order from the end to the beginning, which is just the opposite of the normal order of development of the thing itself. In terms of temperature, autumn is indeed an inversion of spring.

Again, this can be seen in the different changes in organisms in spring and autumn. Spring is the season of gradual recovery of all things, at the beginning of spring, the dead branches gradually grow green leaves, and the hibernating animals are rejuvenated; By the turn of late spring and early summer, everything is already thriving.

Autumn is the opposite, at the end of summer and the beginning of autumn, when life is still flourishing, but it is already showing signs of decline, and by the end of autumn, the hibernating animals are ready, the branches of the deciduous forests have turned bald, and the world is in a state of depression.

The autumn equinox is half of autumn, that is to say, when you enter the autumnal equinox season, you enter the Mid-Autumn Festival.

"Beginning of autumn" is the beginning of autumn, to "frost" for the end of autumn, "autumn equinox" is exactly half of the 90 days from the beginning of autumn to frost, so it is called autumn equinox. According to the 24 solar terms of the traditional Chinese lunar calendar, the autumnal equinox means the real beginning of autumn. As the weather in the northern hemisphere cools, geese, swallows, and cuckoos begin to fly in flocks from the gradually cold north to the south.

As the old saying goes, "The autumn equinox, the yin and yang are half of each other, so the day and night are even, and the cold and summer are even." "The autumn equinox solar term," yin and yang are half of each other," refers to the autumn equinox, when the qi of heaven and earth is yin and yang decline, and it is to the extent that it is evenly matched. Compared with the lush summer, when the flowers and trees are withering, the grass is withering and the leaves are falling, and people's emotions are also prone to a sense of desolation and depression.

In fact, from a positive point of view, the clouds decrease during the autumn equinox, and the scenery is distinct, which is the poet's praise of "autumn water and the same color of the sky". Look up and the blue sky is thousands of miles, go out and the cool breeze is blowing, people call it "autumn high and cool", and the osmanthus is fragrant, the crab fat chrysanthemum is yellow, it is a good opportunity to travel and taste the food. Therefore, if there is no thought of "sadness and autumn for qi" in people's hearts, the autumn equinox is actually a beautiful and pleasant season.

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.

Vernal equinox: "The equinox, the point where the yellow and red intersect, the sun travels here, it is the equinox of day and night." ”

The meaning of the vernal equinox is that the time of day is equal to the day and night, each of which is 12 hours; The second is that in ancient times, the beginning of spring to the beginning of summer was spring, and the spring equinox was in the three months of spring, and the spring was equally divided.

2.Autumn equinox: "The autumn equinox, yin and yang are half of each other, so the day and night are even, and the cold and heat are even." "Autumn equinox" means "half".

"Autumn equinox" has two meanings:

First, the sun reaches 180 degrees of ecliptic longitude on this day 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, according to the ancient Chinese division method of starting with the beginning of spring, summer, autumn and winter, the autumn equinox is among the 90 days of autumn, and the autumn is equally divided.

3.Summer solstice: "The north solstice of the day, the solstice of the long day, and the short solstice of the sun, so it is called the summer solstice." The most solitary, the extreme. ”

On the day of the summer solstice, the sun reaches the northernmost point of the year, almost reaching the Tropic of Cancer (23°26 N'The days are longest in the Northern Hemisphere, and the days get longer the further north you go.

4.Winter solstice: the solstice of the cathode, the beginning of yang, the solstice of the south of the day, the solstice of the short day, and the solstice of the long shadow of the sun, so it is called the "winter solstice".

It was the shortest day and longest night of the year in the Northern Hemisphere.

The 24 solar terms are: the beginning of spring, rain, stunning, vernal equinox, Qingming, Guyu, Lixia, Xiaoman, Mangzhong, summer solstice, small heat, great heat, beginning of autumn, summer heat, white dew, autumn equinox, cold dew, frost, beginning of winter, light snow, heavy snow, winter solstice, small cold and Aberdeen Hall Feng big cold.

The 24 solar terms of the lunar calendar are a supplementary calendar established in ancient China to guide agricultural affairs, and are the crystallization of the long-term experience and wisdom of the ancient Chinese working people.

As far back as the Spring and Autumn Period, the ancient Chinese sages set out the four solar terms of mid-spring, mid-summer, mid-autumn and mid-winter, and then continuously improved and perfected, and by the Qin and Han dynasties, the twenty-four solar terms had been fully established.

The intangible cultural heritage of the 24 solar terms of the lunar calendar is very rich, including not only related proverbs, songs, legends, etc., but also traditional production tools, living utensils, handicrafts, calligraphy and painting and other works of art, as well as Chinese festival culture, production rituals and folk customs that are closely related to the festivals.

The 24 solar terms are the specific manifestations of ancient Chinese agricultural civilization and have high research value of agricultural history and culture.

On May 20, 2006, the 24 solar terms of the lunar calendar declared by the China Agricultural Museum were approved by the Chinese Agricultural Museum to be included in the first batch of national intangible cultural heritage list.

The autumnal equinox means the sixteenth of the twenty-four solar terms and the fourth solar term of autumn.

Autumn equinox, dou finger unitary; 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.

Autumn equinox, "fen" means "equinox" and "half", in addition to referring to the equinox 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, 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 autumn equinox used to be the traditional "moon festival", and the Mid-Autumn Festival evolved from the "autumn evening moon festival". On June 21, 2018, the approval of the establishment of the "Chinese Farmers' Harvest Festival" agreed to establish the "Chinese Farmers' Harvest Festival" from 2018 onwards.

Every year around September 23, when the sun reaches 180 degrees of yellow longitude, it enters the "autumn equinox" solar term. The "autumn equinox" and the "spring equinox" are the earliest solar terms established by the ancients. Press "Spring and Autumn Dew, Yin and Yang in and Out of the Upper and Lower Chapters" cloud:

The autumn equinox is accompanied by yin and yang, so the day and night are even, and the cold and summer are even.

The characteristics of rapid cooling in autumn make the "three autumns" of autumn harvest, autumn ploughing and autumn planting particularly tense. According to research, China has long used the "autumn equinox" as a symbol of cultivation.

The autumn equinox has two meanings, the first means that the time of day and night is the same, and the second means that the autumn is equinoxed, and the weather gradually turns from hot to cool. On the day of the autumnal equinox, the direct point of the sun is located at the equator, and the day and night hours are the same in all parts of China. After the autumnal equinox, the direct point of the sun shifts from the equator to the southern hemisphere, and the days and nights begin to be longer in various parts of the northern hemisphere, and the opposite is true in the southern hemisphere.

The autumnal equinox is over.