Interpretation of solar terms in solstice winter

1, the winter solstice is the 22nd solar term among the 24 solar terms in China, when the sun reaches 270 degrees of the yellow meridian. "Zunxian Manuscript" records: "When the cathode arrives, the sun begins to grow, the sun goes south, and the days are short and the shadows are long, so it is called the winter solstice." On the solstice of winter, the sun shines directly on the tropic of Capricorn, and the day is the shortest and the night is the longest in the northern hemisphere. 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 from 0 to 23 in Gregorian calendar 65438+February 265438.

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. For the rest of the northern hemisphere, the winter solstice is also the lowest day at noon in a year.