When is the date of the winter solstice in 2020?

65438+February 2, 20201,Monday, the seventh day of the winter month.

On the day of winter solstice, the sun moves to 270 degrees of the yellow meridian (winter solstice), and the position of the sun directly on the ground reaches the southernmost point of the year. The sun is almost direct to the Tropic of Capricorn (also known as the winter solstice daily line), and the sun is most biased towards the northern hemisphere. Therefore, in all parts of the northern hemisphere, the winter solstice is the shortest day in a year, and the farther north, the shorter the day. North of the Arctic Circle, the sun is below the horizon all day, which is the widest day of the year in the northern hemisphere.

The origin of winter solstice

The winter solstice is the 22nd of the 24 solar terms, that is, from June 65438+February 2 1 day to June 65438+February 22 every year. When the longitude of the solar meridian reaches 270 degrees, it is also the extreme value of the southbound direction of the direct point of the sun.

The winter solstice can be traced back to the Zhou Dynasty at the earliest. According to legend, the Duke of Zhou chose the day with the longest shadow in a year as the beginning of the New Year, and the first month in the weekly calendar was 1 1 month in the summer calendar. Since the Han Dynasty, Emperor Wu of the Han Dynasty has adopted the summer calendar to distinguish the first month from the winter solstice. Since then, people have specially celebrated the Winter Solstice Festival, which continues to this day.