What is the day of the winter solstice in 2020? The winter solstice is not only one of the twenty-four solar terms in our country, but also a traditional festival in our country, and the time of the winter solstice is also different every year, so what day is the lunar calendar for the winter solstice in 2020? The following small series introduces the specific time of this year's winter solstice.
The date of the 2020 winter solstice solar terms: Monday, December 21, 2020, the seventh day of the first month of the lunar calendar
The winter solstice, also known as the short solstice, the winter festival, the sub-year, the worship of winter, etc., has both natural and humanistic connotations, which is not only an important solar term in the twenty-four solar terms, but also a traditional festival of Chinese folk. The winter solstice is one of the four hours and eight festivals, which is regarded as a big festival in winter, and in ancient times, there was a saying that the winter solstice was as big as a year, so the ancients called the winter solstice "sub-year" or "small year". Winter solstice customs vary in content or detail depending on the region. In some parts of the southern coast of China, there is the custom of worshiping ancestors and feasting on the winter solstice; in northern China, there is a custom of eating dumplings every year on the winter solstice day.
Astronomical significance of the winter solstice
Modern astronomical science determines that on the day of the winter solstice, the sun runs to 270 ° ecliptic longitude (winter solstice point), the position of the sun directly hitting the ground reaches the southernmost point of the year, the sun almost directly hits the Tropic of Cancer (also known as the winter solstice line), and the sunlight is the most inclined to the northern hemisphere. Thus, the winter solstice day is the shortest day of the year and the longest night of the year throughout the Northern Hemisphere, and the higher the latitude, the shorter the day and the longer the night.
For the rest of the Northern Hemisphere, the winter solstice is also the day when the sun is at its lowest height at noon throughout the year. North of the Arctic Circle, the sun sits below the horizon all day, making it the most extensive day of the year in the Northern Hemisphere. On the day of the winter solstice, the Northern Hemisphere receives the least amount of solar radiation, about 50% less than the Southern Hemisphere, and the Southern Hemisphere is in the middle of extremely hot summer.
The winter solstice is the southernmost day of the year for the sun, the ultimate of the sun's southward travel. After this day, the direct point of the sun began to move north from the Tropic of Cancer, the length of the day in the northern hemisphere began to gradually increase, and the height of the noonday sun gradually increased. It is worth noting that around the winter solstice, the Earth is located near perihelion and runs slightly faster, which causes the sun to spend about 8 days shorter in the southern hemisphere in the year than in the northern hemisphere, so the winter in the northern hemisphere is slightly shorter than the summer.
Source: First Constellation Network
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