What do you mean by three or nine days in the calendar of 2024?

"Three or nine days" is a concept in China's traditional meteorology, which means that after the winter solstice, every nine days is a stage, and * * * is divided into three nine days, that is, three stages.

"Three or nine days" usually refers to the third nine days from the date of winter solstice, that is, 19 days to the 27th day after winter solstice. During this period, due to the long nights, short days and low solar angle, the temperature plummeted, which was the lowest in most parts of China. In agricultural production, the weather conditions for three or nine days have an important influence on crop growth, so farmers will arrange agricultural activities according to the weather conditions for three or nine days.

At the same time, the 39 th is also a high incidence period of respiratory diseases such as influenza, and people will take various measures to keep warm and prevent diseases. The three or nine days in 2024 are between Gregorian calendar 1 and February, and the specific date needs to be calculated according to the lunar calendar of that year. Under normal circumstances, the specific date of March 9 will change, but it is generally 65438+ 10 every year.

Briefly describe the source of Sanjiutian:

The concept of three or nine days originated from the traditional lunar calendar and meteorology in China. In the China lunar calendar, the winter solstice is a very important solar term, which indicates that the sun begins to conquer darkness gradually, and the days become longer and the nights become shorter. The ancients believed that from the winter solstice, every nine days was a stage, and * * * was divided into three nine days, namely, three stages, namely, "September 19th", "February 29th" and "March 31st". Among them, "Sanjiu" usually refers to the third nine days from winter to Sunday, which is also the coldest period of the year.

The origin of this concept can be traced back to the ancient agricultural society in China, when people arranged agricultural activities and daily life according to the movement of the sun and climate change. It is found that the weather will gradually get colder from winter to Sunday, and the temperature will reach the lowest point during the "March 9th" period. As a result, Sanjiu became a traditional meteorological term to describe the coldest period in winter.