The meaning of each of the 24 solar terms.

1, summer solstice, winter solstice: It means hot summer and cold winter are coming. The hottest month in China is July, and the summer solstice is June 22nd, which indicates that the hottest summer is coming. The coldest month in China is 65438+ 10 month, and the winter solstice is 65438+February 23rd, which means that the coldest winter is coming, so it is called summer solstice and winter solstice respectively. Because the solstice day in summer is the longest and the solstice day in winter is the shortest, it is also called long day and short day in ancient times.

2, vernal equinox, autumnal equinox: it means that day and night are equally divided. These two days are equal day and night, which were collectively called day and night in ancient times. These two solar terms are between beginning of spring and Changxia, and between beginning of autumn and beginning of winter, which divide the spring and autumn into two halves, so there is also reason to explain the vernal equinox and the autumnal equinox.

Beginning of spring, Changxia, beginning of autumn and beginning of winter: According to the method of dividing seasons in ancient Chinese astronomy, four seasons are the beginning, from independent spring to long summer as spring, from long summer to beginning of autumn as summer, from beginning of autumn to beginning of winter as autumn, and from beginning of winter to beginning of spring as winter. Standing, it means starting. So the four solar terms refer to beginning of spring, long summer, beginning of autumn and beginning of winter.

3. Rain: It means that the winter with little rain has passed and the rain began to increase gradually.

4. Sting: Sting means hiding. Animals that hibernate in the soil for the winter are called stings, and they come out after rejuvenation the next year. In ancient times, people thought they were awakened by thunder, so they called it a sting. From the day of the sting, thunder can be heard, and insects and small animals hibernating underground are awakened by thunder and unearthed.

5. Qingming: The weather is sunny and warm, and the vegetation begins to turn green. The clean and bright scenery replaced the cold winter scene where the vegetation was yellow and everywhere was depressed.

6. Grain Rain: The rainfall increased obviously, which promoted the growth and development of cereal crops. In ancient times, it was called rain to raise a hundred grains.

7. Xiaoman: Summer crops are full of seeds, but they are not yet mature, so they are called Xiaoman.

8. Miscanthus species: Miscanthus refers to crops with awns, which are planted as seeds. The seeds with awns indicate that the seeds of crops with awns, such as wheat and barley, are ripe for harvesting.

9. Slight heat, great heat: Slight heat means heat, and it is the hottest season in a year. Slight summer heat is the beginning of heat, and great summer heat is the hottest time of the year.

10, Chu Xia: Chu means to stop and hide. Being in the heat means that the hot summer is about to "hide".

1 1, white dew: After summer, the temperature drops, and the temperature reaches the condition of dew at night, and the dew condenses more and is white dew-like.

12, cold dew: the temperature is low, there is more dew, and it is cold, so it is called cold dew.

13, first frost: the climate is getting cold and there is frost.

14, light snow, heavy snow: after winter, the weather was cold and it began to snow. When it snows lightly, it begins to snow; There is snow on the ground when it snows heavily.

15, slight cold, severe cold: cold means cold, which is the coldest season of the year. The climate begins to get cold, which is called slight cold. The coldest time of the year is called the Great Cold.

First of all, the naming of solar terms

The names of solar terms 1 and 24 reflect seasons, climate phenomena and climate change.

There are eight solar terms: beginning of spring, Spring Equinox, Long Summer, Summer Solstice, beginning of autumn, Autumn Equinox, beginning of winter and Winter Solstice.

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

4. The precipitation is reflected by seven solar terms: rain, Grain Rain, white dew, cold dew, first frost, light snow and heavy snow;

5. The solar terms reflecting phenological phenomena or agricultural activities are: shock, sunny, full and mans.

6. The vernal equinox, autumnal equinox, summer solstice and winter solstice are divided from an astronomical point of view, reflecting the turning point of solar height change.

7. beginning of spring, Changchun, beginning of autumn and beginning of winter reflect the beginning of the four seasons. Because China is a vast country with a very obvious monsoon and continental climate, the weather and climate vary greatly from place to place, so the four seasons in different regions are also very different.

8. On the surface, the three solar terms, White Dew, Cold Dew and First Frost, reflect the condensation and condensation of water vapor, but in essence, they reflect the process and degree of gradual temperature drop.

9. Smell and clarity reflect natural phenological phenomena, especially stings, indicating that spring will return with the recovery of early thunder in the sky and underground stingers.

Second, pay attention to the naming of solar terms

Solar terms 1 and 24 reflect the annual apparent motion of the sun, so the date of solar terms is basically fixed in the current Gregorian calendar. The first half of the year is on the 6th and 2nd1,and the second half is on the 8th and 23rd, with a difference of 1 ~ 2 days.

2. "Li" is the beginning of all seasons, and four "Li" in spring, summer, autumn and winter are the beginning of four solar terms.

Beginning of spring, Changchun, beginning of autumn and beginning of winter are also called "Li Si". The Gregorian calendar is generally around February 4th, May 5th, August 7th and165438+1October 7th every year. "Li Si" indicates the beginning of the astronomical season. As far as climate is concerned, it is still in the last season. For example, the Yellow River Basin in early spring is still in the middle of winter.

4. "ambition" is the extreme and most important meaning. The summer solstice and the winter solstice are called "the second solstice", which indicates the arrival of summer and winter. Summer solstice and winter solstice are generally on June 2 1 day and February 22 12 of the Gregorian calendar every year. On the summer solstice, the direct sunlight is 23.5 degrees north latitude and 90 degrees yellow longitude, which is the longest day in the northern hemisphere. On the solstice in winter, the direct sunlight is 23.5 degrees south latitude and 270 degrees yellow longitude, and the daytime in the northern hemisphere is the shortest.

5. "Points" here means equal distribution. The vernal equinox and autumnal equinox are called "equal share", which means that the length of day and night is equal. These two solar terms are generally around March 20 and September 23 of the Gregorian calendar every year. At the vernal equinox and autumnal equinox, the ecliptic intersects the equatorial plane. At this time, the ecliptic is 0 degrees and 180 degrees respectively, and the sun shines directly on the equator, and day and night are equal.

reference data

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