24 solar terms, remember?

Beginning of spring: The longitude of the sun is 3 15 degrees. It is the first of the 24 solar terms. It means to begin to enter the spring, "yang and thorns, everything is spring." After beginning of spring, everything revived and was full of vitality.

Vigorous, all the year round.

Rain: The longitude of the sun is 330 degrees. At this time, the spring breeze blows all over, the ice and snow melt, the air is moist, and the rain is increasing, so it is called rain. People often say: "Spring blossoms, and rain is busy to send fertilizer."

Sting: The meridian of the sun is 345 degrees. This solar term means that after beginning of spring, the weather will get warmer, the spring thunder will start to shake, and all kinds of hibernating animals dormant in the soil will wake up and start to move.

Call it a scare. During this period, the eggs that have already wintered will also begin to hatch. Parts of China have entered the spring ploughing season. As the saying goes, "After being shocked, it is warm and harmonious, and the old toad sings folk songs." "Jing Zhiyi

Plough the soil, and the air will flow in the vernal equinox. ""the earthquake does not reach thunder, and the rain is like a dragon. "

Vernal equinox: the meridian of the sun is 0 degrees. The sun is above the equator at the vernal equinox. This is the midpoint of 90 days in spring, when day and night are equal in the northern and southern hemispheres. So it is called the vernal equinox. There are many ancient books in China.

Guan's record of the vernal equinox, such as: "vernal equinox, yin and yang." Therefore, it is hot and cold all day long. " After this day, the direct position of the sun moved further north, and the days in the northern hemisphere were long and the nights were short. Therefore, the vernal equinox is the northern half.

The dance begins in spring. Overwintering crops in most parts of China have entered the spring growth stage. There are agricultural proverbs everywhere: "The vernal equinox comes first, and rice competes for money (Guangdong)", "The vernal equinox is rainy, and the summer equinox is rainy."

It's a burning day (Sichuan) ","It rains at the vernal equinox, and everyone is busy, planting melons and beans before transplanting (Hubei) ","Planting vegetables at the vernal equinox, picking melons in summer (Hunan) ","Planting hemp and indigo at the vernal equinox, and harvesting wheat and garlic at the autumn equinox.

(Anhui) ".

Qingming: solar longitude 15 degrees. At this time, the climate is fresh and warm, the vegetation begins to grow new branches and everything begins to grow. Farmers are busy plowing and sowing in spring. Once upon a time, on this day in Tomb-Sweeping Day, some families.

It is an ancient custom to stick willow branches at the door and go for an outing to sweep the graves in the suburbs.

Grain Rain: The longitude of the sun is 30 degrees. It means that rain gives birth to grains, because rain moistens the earth and grains grow. So Grain Rain is "a hundred valleys are born because of rain". As the saying goes, "Before and after Grain Rain.

Grow melons and beans. "

Changxia: The longitude of the sun is 45 degrees. Now it's long summer, and since then, everything has flourished. It is customary to think that long summer is a significant increase in temperature, close to the heat, thunderstorms and increased crops.

Entering the peak season is an important solar term for growth.

Xiaoman: The longitude of the sun is 60 degrees. Since Xiaoman, summer crops such as barley and winter wheat have borne fruit and full seeds, but they are not yet mature, so they are called Xiaoman.

Busy planting: the longitude of the sun is 75 degrees. This is the most suitable food crop for sowing with awn, such as late rice, millet, millet and so on. Crops with awns will not mature if they are planted after this time. At the same time,

"awn" refers to crops with awns, such as wheat and barley, and "species" refers to seeds. Awn seeds indicate the maturity of awned crops such as wheat. Around the awning, rainfall increased in the middle and lower reaches of the Yangtze River in central China.

As the temperature rises, it enters the rainy season. The air is humid, the weather is extremely sultry, and all kinds of utensils and clothes are prone to mildew. Therefore, in the middle and lower reaches of the Yangtze River in China, it is called "Huangmeitian".

Solstice in summer: the yellow meridian of the sun is 90 degrees. The sun is at the "summer solstice" with a longitude of 90 degrees. The sun is almost directly above the Tropic of Cancer, and it is the highest at noon. This day is the longest and shortest day in the northern hemisphere.

One day, from this day on, it will enter the hot season, when everything in the world grows most vigorously. Therefore, in ancient times, this day was called the northern solstice, which meant that the sun moved to the northernmost day. get through

On the solstice of summer, the sun gradually moves south, and the days in the northern hemisphere are getting shorter and shorter, and the nights are getting longer and longer.

Slight summer heat: solar calendar 105 degrees. It's already very hot, but it's not the hottest time yet, so it's called Xiaoshu. At this point, it is already around the beginning.

Summer: solar calendar 120 degrees. Summer is the hottest solar term in a year, around two volts. High temperature weather of 40 degrees Celsius often occurs in many places in the Yangtze River Basin. Do a good job in heatstroke prevention

Cooling work. There is a lot of rain in this solar term, and there is a proverb "Little summer heat, big summer heat, drowning mice", so we should pay attention to preventing information and waterlogging.

Beginning of autumn: solar longitude 135 degrees. Autumn means that plants are about to mature. From this day on, autumn began, the autumn was crisp, the moon was bright and the wind was clear. Since then, the temperature has gradually decreased from the hottest time.

Summer: solar calendar 150 degrees. At this point, the heat has come to an end and the heat will dissipate. It is a turning point of temperature drop, a symbol of climate cooling, and indicates the end of summer.

Millennium: solar calendar 165 degrees. When the weather turns cold, the ground moisture frosts the most.

Autumnal equinox: the longitude of the sun is 180 degrees. The autumnal equinox and the vernal equinox are the same. The sun shines almost directly on the equator, and day and night are almost equal. From this day on, the position of direct sunlight extends from the equator to the southern hemisphere.

As time went on, the northern hemisphere began to have shorter days and longer nights. According to China's autumnal equinox theory, this day is exactly half of the ninety days in autumn, so it is called autumnal equinox. But in astronomy, it is stipulated that autumn in the northern hemisphere comes from

It begins at the autumnal equinox.

Cold dew: solar meridian 195 degrees. After the white dew, the weather turned cold and dew began to appear. When it comes to cold dew, there will be more dew and the temperature will be lower. Therefore, some people say that cold is dew, first.

White first and then cold means that the climate will gradually turn cold. Water vapor condenses into dew.

First frost: the longitude of the sun is 2 10 degrees. It's already cold, and there is frost, so it's called the first frost.

Beginning of winter: The longitude of the sun is 225 degrees. Traditionally, people in China believe that this day is the beginning of winter. Winter, as the end, refers to the end of a year's field work, after the harvest of crops.

It means collection. As soon as beginning of winter passes, the middle and lower reaches of the Yellow River in China will soon freeze. Farmers all over the country will gradually move to basic farmland water conservancy? Hey? Architecture and construction

In other agricultural activities.

Xiaoxue: The longitude of the sun is 240 degrees. The temperature dropped and it began to snow, but it was not the season of heavy snow, so it was called light snow. Before and after the light snow, it began to snow in the Yellow River basin (more snow in the south)

After two solar terms); In the north, it has entered the freezing season.

Heavy snow: the longitude of the sun is 255 degrees. Before and after the heavy snow, there was gradually snow in the Yellow River basin. It's already the severe winter of "thousands of miles frozen, Wan Li snowing" in the north.

Winter solstice: the longitude of the sun is 270 degrees. On the solstice of winter, the sun shines almost directly on the Tropic of Capricorn. The northern hemisphere of China has the shortest day and the longest night, and it has begun to enter several cold days. Astronomical regulations

One day is the beginning of winter in the northern hemisphere. From winter to the future, the direct sunlight position gradually moves northward, and the daytime in the northern hemisphere gradually becomes longer. As the saying goes, "Eating noodles on the solstice in winter can grow a thread a day".

Slight cold: The yellow meridian of the sun is 285 degrees. After the slight cold, it began to enter the cold season, and the cold air accumulated for a long time and was cold. Slight cold refers to the cold weather, not yet extreme.

Great cold: the longitude of the sun is 300 degrees. Great cold refers to extremely cold weather. Around the Great Cold is the coldest season of the year. The great cold is on March 9, as the saying goes, "Cold is on March 9".

After the severe cold, spring came and the weather became warm. At this point, the earth made a revolution around the sun and completed a cycle.

From the meaning of solar terms, we can know that 24 solar terms can be divided into four categories, namely: beginning of spring, vernal equinox; Long summer, summer solstice: beginning of autumn, autumnal equinox; Beginning of winter, winter from August to August.

solar term

There are five solar terms symbolizing temperature change: slight summer heat, great summer heat, summer heat, slight cold and severe cold.

There are seven solar terms reflecting precipitation: rain, Grain Rain, white dew, cold dew, first frost, light snow and heavy snow.

There are four solar terms reflecting phenological phenomena or agricultural activities: fright, Qingming, Xiaoman and Mangzhong.