The solstice in winter is the best time to make up for it in a year.

The winter solstice is the best time to make up for it in a year, from September 9 to winter to March 9 in the future.

On the day of winter solstice, although the sun is low and the days are short, the temperature of winter solstice is not the lowest in meteorology. In fact, due to the "accumulated heat" on the surface, it is usually not very cold before the winter solstice, and the real cold is after the winter solstice. Due to the great difference of climate in China, this winter is obviously late for most parts of our country, and the winter solstice marks the beginning of the cold season, and people begin to "beginning of winter".

The winter solstice, known as the "southern solstice", is a solar term that reflects the direct movement of sunlight. On the winter solstice, the sun moves south to the extreme, and the sun shines directly on the tropic of Capricorn. From this day on, the direct point of the sun returned to the north. The solstice in winter is the turning point of "South to North". Since then, the sun has risen in height, and the days in all parts of the northern hemisphere are getting longer every day.

The solstice in winter marks the rebirth of the sun, and the round-trip movement of the sun enters a new cycle. The solstice in winter is an auspicious day. After the solstice in winter, the days get longer and longer, and the sun rises again. It is the beginning of the round-trip cycle of the direct point of the sun and should be celebrated. Hanshu: "It's sunny in winter, so congratulations."

Phenological phenomenon

Some ancient Chinese literary works divided the winter solstice into three stages: "First, earthworms knot;": Second, wait for the elk horn to solve; Waiting for the spring to gush out. " It shows that the earthworms in the soil are still curled up, and the elk feel that the yin is gradually receding. Because the direct point of the sun returns to the north from winter to the future, the sun moves back and forth into a new cycle, the height of the sun rises from now on, and the days get longer day by day, so the spring water in the mountain can flow and be as warm as spring.

Winter is a good time to build water conservancy, vigorously carry out farmland capital construction and accumulate fertilizer. At the same time, wax fertilizer should be applied to prevent freezing. We should strengthen the management of winter crops, clear ditches and drain water, and cultivate soil to take root in Jiangnan area of China. For the hardened winter soil that has not been ploughed, it should be ploughed quickly to loosen the soil, enhance the ability of water storage and water conservation, and eliminate overwintering pests. In the southern coastal areas where spring planting has begun, it is necessary to be serious.