Difference of sunshine between severe cold day and winter solstice day

The winter solstice has the shortest sunshine time and the longest night, and the severe cold day is the coldest day of the year.

1, Introduction to the Great Cold:

The Great Cold is the last of the 24 solar terms. Every year around 65438+10.20, when the sun reaches 300, it is a severe cold.

At this time, the cold wave frequently goes south, which is the coldest period of the year in most parts of China. The wind is strong, the temperature is low, and the snow on the ground does not melt, showing a cold scene of ice and snow. During this period, railway, post and telecommunications, petroleum, shipping and other departments should pay special attention to take measures to prevent severe weather such as strong winds and blizzards as soon as possible. Agriculture should strengthen the cold and antifreeze of livestock and wintering crops.

2. Introduction to Winter Solstice:

Winter solstice is an important solar term in the China lunar calendar, and it is also a traditional festival of the Chinese nation. The winter solstice is usually called "Winter Festival", "Dragon solstice Festival" and "Asian New Year". As early as more than 2,500 years ago in the Spring and Autumn Period, China had observed the sun with the earth, and determined the winter solstice, which was the earliest of the 24 solar terms, and the time was between 0 and 23 in Gregorian calendar 65438+February 265438.

On the day of the winter solstice, the direct sunlight reaches the southernmost point of the year, almost directly on the tropic of Capricorn (23 26' south latitude). On this day, the northern hemisphere gets the least sunshine, 50% less than the southern hemisphere. The days in the northern hemisphere are the shortest, and the farther north they are, the shorter they are.

After the winter solstice, the stars in the night sky are completely replaced by the winter stars. From today, they will enter the ninth. At this time, the southern hemisphere is in a hot summer.