Characteristics of the twenty-four solar terms: Festival time and distribution in four seasons?

The ancient people relied on the dates of the solar terms to predict astronomical phenomena; there are twenty-four solar terms in a year, beginning in spring and ending in winter, and each solar term has corresponding climate characteristics. So how much do you know about the climate characteristics of the twenty-four solar terms? Next, Lao Huang will analyze it for everyone in this issue, let’s take a look!

The characteristics of the twenty-four solar terms and the four-season distribution of the intersection times

The spring solar term Beginning of Spring: Dou Zhiyin; the yellow longitude of the sun is 315°; it is the first solar term among the twenty-four solar terms . Li means beginning, and Lichun is the beginning of spring. The festival falls on February 3-5 in the Gregorian calendar. Rain: Douzhiren; the sun's ecliptic longitude is 330°; rainfall begins and the amount gradually increases. The festival falls on February 18-20 in the Gregorian calendar. Jingzhe: Douzhiding; the yellow longitude of the sun is 345°; Jingzhe 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. Vernal Equinox: Douzhiren; the ecliptic longitude of the sun is 0°; equinox means equinox. The vernal equinox represents the equinox of day and night. The festival falls on March 20-22 in the Gregorian calendar. Tomb Sweeping Day: Douzhiding; the sun's ecliptic longitude is 15°; the weather is sunny and the vegetation is luxuriant. The festival falls on April 4-06 in the Gregorian calendar. Grain Rain: Dou Zhigui; 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.

The summer solar term Beginning of Summer: Dou refers to the southeast; the ecliptic longitude of the sun is 45°; the beginning of summer. The festival falls on May 05-07 in the Gregorian calendar. Xiaoman: fighting nails; the sun's longitude is 60°; the grains of wheat and other summer crops begin to be full. The festival falls on May 20-27 in the Gregorian calendar. Ear seeds: Douzhiji; the yellow longitude of the sun is 75°; crops with awns such as wheat are mature. The festival falls on June 05-07 in the Gregorian calendar. Summer Solstice: Douzhiyi; the sun's ecliptic longitude is 90°; hot summer is coming. The festival falls on June 21st and 22nd in the Gregorian calendar. Xiaoshu: Douzhixin; 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. Great Heat: Dou Zhi C; the sun's ecliptic longitude is 120°; the hottest time of the year. The festival falls on July 22-24 in the Gregorian calendar.

Autumn solar term Beginning of Autumn: Dou points to the southwest; the sun's ecliptic longitude is 135°; the beginning of autumn. The festival falls on August 07-09 in the Gregorian calendar. Chushu: 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. White dew: Douzhigui; the sun's yellow longitude is 165°; the weather turns cold and the dew condenses and becomes white. The festival falls on September 7-09 in the Gregorian calendar. Autumn Equinox: The Fighting Zhi is over; the ecliptic longitude of the sun is 180°; day and night are equinoxed. The festival falls on September 22-24 in the Gregorian calendar. Cold dew: fighting nails; the sun's yellow meridian is 195°; dew is cold and will freeze. The festival falls on October 8-09 in the Gregorian calendar. Frostfall: Douzhixu; the sun's ecliptic longitude is 210°; the weather is getting colder and frost begins. The festival falls on October 23-24 in the Gregorian calendar.

The winter solar term Beginning of Winter: Dou refers to the northwest; the sun's ecliptic longitude is 225°; the beginning of winter. The festival falls on November 7-8 in the Gregorian calendar. Light snow: Douzhiji; the sun’s ecliptic longitude is 240°; it means it’s starting to snow. The festival falls on November 22-23 of the Gregorian calendar. Heavy snow: Douzhigui; the sun's ecliptic longitude is 255°; snowfall increases and the ground may be covered with snow. The festival falls on December 6-8 in the Gregorian calendar. Winter Solstice: Douzhizi; the sun's ecliptic longitude is 270°; the cold winter is coming. The festival falls on December 21-23 of the Gregorian calendar. Xiaohan: Douzhizi; the sun's yellow longitude is 285°; the climate becomes cold. The festival falls on January 5-7 in the Gregorian calendar. Dahan: Dou Zhi Chou; the sun's ecliptic longitude is 300°; the coldest time of the year. The festival falls on January 20-21 in the Gregorian calendar.

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