What's the date in winter?

Astronomically speaking, it was from February to March in 65438. China used to refer to the three months from beginning of winter to beginning of spring, and also referred to the "October, November (winter) and December (wax) months" of the lunar calendar.

The time in the northern and southern hemispheres is different. According to the meteorological significance, in the temperate and cold regions of the southern hemisphere, the winters are in June, July and August (or from May 2/kloc-0 to August 22 according to the constellation standard), and in the temperate and cold regions of the northern hemisphere, the winters are in 12, 1 and February (or according to the constellation standard 16544)

According to the meaning of solar terms, winter begins at the beginning of winter and ends in beginning of spring. Westerners generally call winter the solstice and spring the winter. From the climatological point of view, it is winter when the average temperature is lower than 10℃ for five consecutive days.

Extended data:

The difference of winter temperature between north and south of China;

1, China is a vast country with a long distance between north and south. Geographically, it is lower in the south and higher in the north, with a difference of more than 30 degrees. In the northern hemisphere, the sun shines directly into the southern hemisphere in winter, which leads to stronger or longer solar radiation intensity and sunshine duration and higher temperature in the south than in the north. This is due to the latitude position. Different latitude positions lead to different solar radiation.

In summer, the sun shines directly in the northern hemisphere. Although the radiation intensity in the south is still greater than that in the north, the sunshine time in the north is longer than that in the south, so the difference of solar radiation between the north and the south will not be as great as that in winter. The temperature difference is not that big.

2. The northern winter is affected by the cold high pressure in Siberia, Mongolia, and there are often cold air going south to form a cold wave, which greatly reduces the temperature. The south is affected by the warm and humid air flow from the ocean, and the winter is mostly mild. This is caused by the climate.

3. East-west mountains, such as Qinling Mountains, block the southward movement of cold air mass, which makes the temperature in the south high and the temperature in the north low, and the temperature difference naturally increases. This is due to the terrain. Under the comprehensive effect of many geographical factors (solar radiation, climate and topography), the temperature difference between north and south in China is much larger in winter than in summer.

Baidu Encyclopedia-Winter