1. Beginning of Spring: Pointing method of bucket handle: Dou Zhiyin; Method of fixing Qi: the yellow longitude of the sun is 315 degrees. Li is the first solar term among the twenty-four solar terms. Li means beginning, and Lichun is the beginning of spring. The festival takes place on February 3-5 of the Gregorian calendar.

2. Rain: Douzhiren; the yellow longitude of the sun is 330°. The rain begins and the amount gradually increases. The festival falls on February 18-20 in the Gregorian calendar.

3. Jingzhe: Dou Zhi Ding; the yellow longitude of the sun is 345°. Hiding means hiding. Jingzhe refers to the sudden movement of spring thunder that wakes up hibernating animals hibernating in the soil. The festival falls on March 05-07 in the Gregorian calendar.

4. Vernal Equinox: Dou Zhi Ren; the ecliptic longitude of the sun is 0°. Divide means to divide equally. The vernal equinox represents the equinox of day and night. The festival falls on March 20-22 in the Gregorian calendar.

5. Qingming: The bucket handle pointing method: bucket refers to B; the calming method: 105 days after the winter solstice; the fixing method: the sun's yellow longitude is 15°. During the Qingming Festival, all things "let go of the old and adopt the new", and the earth presents the image of spring and scenery. The festival falls on April 4-06 in the Gregorian calendar.

6. Guyu: Douzhigui; the yellow longitude of the sun is 30°. Rain produces hundreds of grains. With sufficient and timely rainfall, cereal crops can thrive. The festival falls on April 19-21 in the Gregorian calendar.

7. Beginning of Summer: Dou refers to the southeast; the sun’s yellow longitude is 45°. The beginning of summer. The festival falls on May 05-07 in the Gregorian calendar.

8. Xiaoman: fighting nails; the yellow longitude of the sun is 60°. Xiaoman reflects the climate characteristics of heavy rainfall and heavy rainfall, and the rivers in Xiaoman are full of water. The festival falls on May 20-27 in the Gregorian calendar.

9. Ear Grain: Douzhiji; the yellow longitude of the sun is 75°. "Mangzhong" is a homophonic pronunciation of "busy planting", indicating that all crops are "busy planting". The festival falls on June 05-07 in the Gregorian calendar.

10. Summer Solstice: Douzhiwu; the sun’s ecliptic longitude is 90°. When the sun shines directly on the Tropic of Cancer, it is the summer solstice. The hot summer is coming. The festival falls on June 21st and 22nd in the Gregorian calendar. ?

11. Xiaoshu: Douzhi is pungent; the yellow longitude of the sun is 105°. Shu means hot; Xiaoshu means the climate starts to get hot. The festival falls on July 06-08 in the Gregorian calendar.

12. Great Heat: Dou Zhi C; the yellow longitude of the sun is 120°. The hottest time of the year. The festival falls on July 22-24 in the Gregorian calendar. ?

13. Beginning of Autumn: Dou points to the southwest; the sun’s longitude is 135°. The beginning of autumn. The festival falls on August 07-09 in the Gregorian calendar.

14. End of summer heat: Douzhiwu; the yellow longitude of the sun is 150°. Chu means termination and hiding. Sushu means the end of the hot summer days. The festival falls on August 22-24 in the Gregorian calendar.

15. Bailu: Douzhigui; the yellow longitude of the sun is 165°. The weather has turned cooler and the dew has condensed and turned white. The festival falls on September 7-09 in the Gregorian calendar.

16. Autumn Equinox: The fighting fingers are over; the ecliptic longitude of the sun is 180°. Day and night are equally divided. The festival falls on September 22-24 in the Gregorian calendar.

17. Cold dew: fighting nails; the yellow longitude of the sun is 195°. The dew is cold and will freeze. The festival falls on October 8-09 in the Gregorian calendar.

18. Frostfall: Douzhixu; the yellow longitude of the sun is 210°. The weather is getting colder and frost is starting to appear. The festival falls on October 23-24 in the Gregorian calendar. ?

19. Beginning of Winter: Dou refers to the northwest; the sun’s yellow longitude is 225°. The beginning of winter. The festival falls on November 7-8 in the Gregorian calendar.

20. Xiaoxue: Dou Zhiji; the ecliptic longitude of the sun is 240°. It means it starts to snow. The festival falls on November 22-23 of the Gregorian calendar.

21. Heavy snow: Douzhigui; the sun's ecliptic longitude is 255°. Snowfall is increasing and there may be snow on the ground. The festival falls on December 6-8 in the Gregorian calendar.

22. Winter Solstice: Douzhizi; the longitude of the sun is 270°. The cold winter is coming. The festival falls on December 21-23 of the Gregorian calendar.

23. Xiaohan: Douzhizi; the yellow longitude of the sun is 285°. The climate begins to get colder. The festival falls on January 5-7 in the Gregorian calendar.

24. Great Cold: Dou Zhi Chou; the yellow longitude of the sun is 300°. The coldest time of the year. The festival falls on January 20-21 of the Gregorian calendar.

Extended information:

The twenty-four solar terms are an important part of the long history and culture of the Chinese nation, embodying the historical and cultural essence of Chinese civilization. The "Twenty-Four Solar Terms" and the "Twelve Months" are the basic contents of the Ganzhi Calendar, which has been established in ancient times (or ancient times). According to ancient books, the Emperor's family first created the names of the stems and branches to determine the location of the year.

The "Twenty-Four Solar Terms" are specific seasons in the Ganzhi calendar that represent seasons, phenology, climate changes and establish the "Twelve Months". The Big Dipper rotates cyclically, and this movement of stars is closely related to the changes in seasons. Taking the direction pointed by the handle of the Big Dipper as the standard for determining seasons is called Dou Jian, also known as Yue Jian. According to the method of zodiac signs, the first month of the year is Jianyin, the beginning of spring is the beginning of the year, and the festival is the beginning of the month.

The Ganzhi calendar divides one year into twelve chen ("Jian"), and "Jian" represents the direction of the top of the handle of the Big Dipper. In ancient times, the direction of the top of the handle of the Beidou was used to determine the "twenty-four solar terms". The handle rotated to point to the "twelve stars" in turn, which was called the "December Build" (or "December Order").

In ancient culture, the time and position of the branches and the Eight Diagrams are linked together. The Yin position is the root position of the Eight Diagrams of the day after tomorrow. It is the position of the end of the year and the beginning of the year. It represents the end and the beginning. "Shuo Gua Zhuan": "Gen, the hexagram of the northeast, is the end of all things and the beginning of everything." That is, the handle of the bucket starts from due east to north (Yin position, the day after tomorrow Bagua Gen position), passes through the south, One rotation between west and north is a cycle, which is called a "year". Therefore, the Yin month is the "Spring Festival" and the beginning of spring is the beginning of the year. The handle of the Big Dipper points to the established twenty-four solar terms, starting from the beginning of spring and ending with the great cold. In the Western Han Dynasty, the name "Twenty-Four Solar Terms" first appeared in the document "Huainanzi Tianwenxun". During the period of Emperor Wu of the Han Dynasty, the "Twenty-Four Solar Terms" were absorbed into the "Taichu Calendar" as a supplement to the calendar to guide farming.

Using the "Pingqi method" (i.e. the average time method) to divide solar terms. The "Ping Qi method" uses vertical pole photometry to determine the day short solstice in the Yellow River Basin as the winter solstice day. The date between the winter solstice and the next winter solstice is evenly divided into twelve equal parts, called "Zhong Qi", and then the adjacent "Zhong Qi" is divided into twelve equal parts. The dates between "Zhong Qi" and "Zhong Qi" are equally divided, called "solar terms";

On average, there is one "Zhong Qi" and one "solar term" every month, collectively called the "twenty-four solar terms". The "Ping Qi method" is a time average method. The interval between each solar term is about 15 days. The calculation does not take into account the uneven movement of the sun on the ecliptic. The solar terms divided by the "Ping Qi Method" begin at the winter solstice and end with heavy snowfall. The current "Twenty-Four Solar Terms" come from the "Ding Qi Method" established more than 300 years ago.

The "Dingqi method" is a method of determining solar terms based on the position of the sun on the tropic ecliptic, that is, in a "zodiac" with a 360-degree circle (the apparent path of the sun on the celestial sphere in a year) above, divided into 24 equal parts, one every 15°, with the vernal equinox as the starting point of 0 degrees (but the ordering is still customary to put the beginning of spring first), and is arranged according to the ecliptic longitude.

Every 15 degrees the sun moves on the ecliptic is a "solar term", and the degrees of each "solar term" are equal and the time is unequal. The twenty-four solar terms are 24 points in time. The specific day on which the "point" falls is a natural result of the movement of celestial bodies. The solar terms divided by the "Qi Ding Method" begin at the beginning of spring and end at the end of the Great Cold.

Baidu Encyclopedia-Twenty-Four Solar Terms