Brief introduction of the Millennium solar terms, how did the Millennium solar terms come about?

Brief introduction of Bailu solar terms

Millennium is the 15 solar term in 24 solar terms, and the third solar term in autumn is the end of the application of the moon in the dry calendar and the beginning of the unitary month. Fighting fingers; The sun reaches longitude 165 degrees; Gregorian calendar September 7-9. Millennium is an important solar term, reflecting the cold growth of nature. As the weather turns cold, it is sunny and hot during the day, but the temperature drops quickly after evening, and the temperature difference between day and night is large.

According to the observation of nature, the ancients in China divided the Millennium into three stages: the first stage is when the geese come, the second stage is when the mysterious birds return, and the third stage is when the birds are ashamed. This means that in this solar term, migratory birds such as Hongyan and Swallow fly south to avoid the cold, and hundreds of birds begin to store dried fruit food for the winter. At the moment, farmers are also busy harvesting crops. As the saying goes, grab the autumn. If you don't grab it, it's gone. During the Bailuyuan period, local folk customs mainly included offering sacrifices to Dayu, brewing grain wine and drinking Bailuyuan tea.

How did the Millennium solar terms come about?

The almanac says that the bucket refers to dew, the yin is getting heavier and heavier, and the mausoleum is dew, hence the name dew. Entering the Millennium, the most obvious feeling is that the temperature difference between day and night is large, and it will feel a little cold at night. Although the summer heat may not leave at once, the sultry feeling will gradually fade away, adding a coolness of autumn in the morning and evening. As the weather turns cold, the sun is still hot during the day, and the sun returns to the mountains, and the temperature drops rapidly. White dew, the residual heat of summer gradually disappears, the shadow of heaven and earth rises and spreads, the night becomes cold, the temperature difference between day and night widens, and the cold produces dew condensation, which is also one of the reasons for the white dew.