What are the 24 solar terms?

What are the 24 solar terms related to?

What are the 24 solar terms related to? There are 24 solar terms in a year. Many people don't understand the 24 solar terms, and there are many factors that affect the solar terms. Let me give you some information about the 24 solar terms. Let's have a look.

What are the 24 solar terms? 1 is the China calendar related to the solar calendar. Every two adjacent solar terms are separated by about 15 days. Twenty-four solar terms are a unique invention of China calendar method, which is divided according to the position of the sun on the ecliptic.

For example, the Mid-Autumn Festival is related to the autumnal equinox.

The autumnal equinox is the sixteenth of the twenty-four solar terms, and the time is generally from September 22 to September 24 of the Gregorian calendar every year. On the day of the autumnal equinox, the sun reaches the longitude 180 (autumnal equinox), almost reaching the equator of the earth, and the length of day and night is equal all over the world (regardless of the refraction of the sun light by the atmosphere and the shadow in the morning).

The autumnal equinox used to be the traditional "Festival of Sacrificing the Moon". Now Mid-Autumn Festival comes from the traditional Mid-Autumn Festival.

Extended data

Twenty-four solar terms refer to 24 special festivals in the lunar calendar of China, indicating the seasonal changes. They are formulated according to the position change of the earth on the ecliptic (that is, the orbit of the earth around the sun), and each one corresponds to a certain position reached by the sun every time it runs 15 on the ecliptic. 2016165438+1October 30th was officially listed in the representative list of human intangible cultural heritage by UNESCO.

Four seasons and eight festivals are the skeleton of twenty-four solar terms and calendars. The other 16 solar terms are branches or meat on the skeleton. Using branches or meat is a bridge between astronomical season and meteorological season.

The embryonic period of the twenty-four solar terms is the Zhou Dynasty, so people will naturally use the number 12 when dividing the time series. In the eyes of the ancients, the 24 solar terms were strictly different. The ancients called solar terms "qi", and the twenty-four solar terms were twenty-four "qi", which were divided into "solar terms" and "neutral qi".

The first day of each month, that is, the "qi" at the beginning of the month, is called "solar term"; The second "Qi" in the middle of the month is called "Zhong Qi". In this way, there are 12 solar terms and 12 neutral terms throughout the year, which together are exactly "24 solar terms".

What is the 24 solar terms associated with two traditional festivals in China in the twenty-four solar terms? Tomb-Sweeping Day and winter solstice are traditional festivals in China, and other traditional festivals are also closely related to the 24 solar terms.

Traditional festivals in China include Spring Festival, Lantern Festival, Dragon Head Raising, Social Day, Cold Food Festival, Tomb-Sweeping Day, Dragon Boat Festival, China Valentine's Day, Mid-Autumn Festival, Double Ninth Festival, Winter Solstice and New Year's Eve.

Traditional festivals in China are diverse in form and rich in content. They are an important part of the long history and culture of the Chinese nation, the legal system of a "legal and civilized society" and the basic framework of a regional civilized country.

The origin and development of festivals is a "cultural process of gradual formation and perfection" of human society, and it is the product of the evolution of civilization from apes to humans.

The traditional festivals in China are loaded with myths, legends, astronomy, geography, numbers, calendars and other humanistic and natural cultural contents. Documentary records can be traced back at least to Zheng Xiao and Shangshu in Xia Dynasty.

By the Warring States period, the division of 24 solar terms in a year had been basically completed, and later traditional festivals were also closely related to these solar terms. Every traditional festival in China has its own origin and necessary conditions for its formation.

What are the 24 solar terms? Because the earth runs askew on the ecliptic plane, the sunlight in the southern hemisphere and the northern hemisphere is not equal at different times of the year. The most sunny hemisphere is summer, the least sunny hemisphere is winter, and the others are spring and autumn. Spring and autumn are a transitional season, with direct sunlight near the equator and equal sunshine in the northern and southern hemispheres. Every year on March 2 1 or so, when the direct sunlight point moves from the equator south to the north, it is the vernal equinox season, with warm spring in the northern hemisphere and equal day and night, and autumn in the southern hemisphere. The point of direct sunlight continues to move northward, and the northern hemisphere is getting hotter and hotter, and the daytime time is prolonged and the nighttime time is shortened, while the situation in the southern hemisphere is just the opposite. Every year around June 22nd, when the sun shines directly on the Tropic of Cancer at 23 degrees and 27 minutes north latitude, it is the summer solstice. In the northern hemisphere, it is summer with the longest days, while in the southern hemisphere, it is winter with the longest nights.

After the summer solstice, the direct sunlight turns to the south, and the days in the northern hemisphere become shorter and the nights become longer, while the southern hemisphere is the opposite. Every year around September 23, when the direct sunlight moves south to the equator, it is the autumnal equinox, the northern hemisphere enters autumn, and the southern hemisphere is spring, and day and night are equal. After the autumnal equinox, the sun shines directly into the southern hemisphere and continues to move south. In the northern hemisphere, the days get shorter and the nights get longer, while in the southern hemisphere, the opposite is true. Every year around 65438+February 22nd, the sun shines directly on the Tropic of Capricorn at 23 degrees and 27 minutes south latitude, which is the winter solstice. This is a hot summer in the southern hemisphere, with long days and short nights. The northern hemisphere is a cold winter with short days and long nights. After the winter solstice, the point of direct sunlight turns to the north again, and when it moves to the equator again, it completes a cycle, which is the cause of the four seasons.

Twenty-four solar terms are the unique content of China calendar. The lunar calendar in China is a combination of yin and yang, with the moon's profit and loss cycle as the calculation unit and the earth's revolution as one year. In order to fully reflect the changes of seasons and climate, ancient astronomers determined the vernal equinox, summer solstice, autumn equinox and winter solstice by measuring the shadow of the sun in the Western Zhou Dynasty and the Spring and Autumn Period, and divided the whole year into twenty-four equal parts, each with a name. These are the twenty-four solar terms, namely: beginning of spring, rain, creeping, vernal equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, Dashu, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, First Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold and Severe Cold. These 24 solar terms are in 12 months, and the interval between the two solar terms is about half a month. The sun runs 360 degrees along the ecliptic, and every 15 degrees corresponds to a twenty-four solar terms. This is the origin of the 24 solar terms in our country.