What do you mean by a slight chill?

Slight cold is the 23rd solar term in 24 solar terms and the 5th solar term in winter. Gregorian calendar 65438+1October 5-7. The slight cold marks the official start of the season and winter. Cold air is cold for a long time, and slight cold means that the weather is cold but not extreme.

The Great Cold is the last of the 24 solar terms. Like slight cold, great cold is also a solar term indicating the degree of cold weather. In some parts of China, severe cold is not as cold as slight cold, but in some years and a few coastal areas, the lowest temperature in the whole year will still appear in the severe cold solar terms. Slight cold and severe cold are the periods with the least rainfall in a year.

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The development of the twenty-four solar terms

The trunk calendar, also known as the solar calendar or China solar calendar, is a calendar marked by 60 different groups of heavenly stems and earthly branches. Ganzhi calendar has a long history, extensive and profound, and contains profound cosmic astrological codes.

The trunk calendar is mainly composed of four parts: trunk calendar year, trunk calendar month, trunk calendar day and trunk duration. "Twelfth Construction" and "Twenty-four Solar Terms" are its basic contents. Wan, a famous historian in Ming Dynasty, determined that the main branch was invented by the emperor according to the clear records in the ancient documents of China.

The current 24 solar terms are a knowledge system formed by observing the movement of the sun for a year and understanding the changing laws of seasons, climate and phenology in a year. It divides the orbit of the sun in one year into 24 equal parts, corresponding to a certain position reached by the sun every time it runs 15 on the ecliptic, and each equal part is a "solar term".