What four stages did the ancients divide winter into, and in which stage was midwinter located?

Winter is divided into three stages. Early winter, midwinter and seasonal winter. Corresponding to October, November and December of the lunar calendar, midwinter is in the second stage.

Corresponding to the lunar November. The lunar year is divided into twelve months: Meng Chun, Midspring, Ji Chun, Xia Meng, Midsummer, Late Summer, Qiu Meng, Midautumn, Qiu Ji, Mengdong, Midwinter and Jidong.

In winter, that is, "everything will be harvested in the end", after beginning of winter, everything began to be hidden. Li Si's division of four seasons reflects many characteristics such as climate and phenology. At present, four seasons are often divided according to the temperature change, and the method of "weather average temperature" proposed by modern scholar Zhang Baokun is adopted. According to the four seasons divided by the weather average temperature method, the average daily temperature is equal to or lower than 10 degrees Celsius for five consecutive days, which is regarded as entering winter.

Extended data:

Beginning of winter, together with beginning of spring, Changxia and beginning of autumn, is called "Sili", which is a seasonal solar term. Four seasons alternate throughout the year, and "four stands" means the rotation of four seasons, reflecting the changing laws of phenology and climate, such as spring, long summer, autumn harvest and winter storage. Winter, rainfall, humidity, light, temperature, etc. At the turning point, the climate began to transition from autumn to winter.

In the south of China (low latitude area), it is rainy, stormy, sunny and humid, and the rainfall and storms change obviously when the seasons change. In the northern region, there is little rain and storm. These changes are not obvious in seasonal changes, but the temperature changes obviously, and the temperature changes obviously in the northern region (mid-latitude region) in four seasons.