1. Background and significance of solar terms
Solar term is a traditional time measurement method in China, which divides a year into 24 equal-length time periods, and each solar term marks a specific climate, phenology and agricultural activities. The change of solar terms reflects the change of nature and helps people to arrange their production and life reasonably.
2. Dates and characteristics of beginning of autumn.
Beginning of autumn usually appears around August 7th in the Gregorian calendar, and the specific date will be slightly different according to the annual change of the solar orbit. Beginning of autumn is characterized by gradually decreasing temperature and cool weather, and it has entered autumn.
3. Ancient agricultural activities
Beginning of autumn is an important time for ancient farmers to harvest summer grain and prepare for autumn sowing. After beginning of autumn, farmers began to harvest summer crops, such as barley and corn, and began to plant autumn crops, such as wheat and soybeans.
4. Health and health care
Beginning of autumn is an important weather turning point. People seize the opportunity to adjust their diet and living habits and spend autumn healthily. After beginning of autumn, people can appropriately increase the calories of food and eat more foods that tonify qi and blood, such as tremella, lotus seeds and glutinous rice.
5. Astronomical significance
Beginning of autumn is the moment when the longitude of the sun is 315, which means that the true north pole of the sun moves south, and the night becomes longer and the day becomes shorter. This moment also represents the solar terms of alternating yin and yang in the past, and the sun in summer began to turn cloudy gradually, and the balance between yin and yang between heaven and earth was re-established.
6. Humanistic significance
Beginning of autumn has rich meanings in China culture, and has been endowed with many symbols and implications. In poetry and songs, beginning of autumn is often used as the material to describe autumn scenery, such as "The white dew is frost, the so-called Iraqi people, and then the water is boundless", "The sunset is lonely in Qi Fei, and the autumn water is * * * and the sky is one color".
7. Festivals and customs
As an important solar term, beginning of autumn also has some related traditional festivals and customs. For example, eating autumn cakes, swinging and stepping on autumn are local folk activities, expressing the expectation of a bumper harvest and beautiful autumn.
8. Climatic characteristics of beginning of autumn.
In beginning of autumn season, the summer heat gradually disappears, the weather begins to turn cold, and the temperature difference between morning and evening increases. There are often cool autumn rains at this time, laying the foundation for the arrival of autumn.