Collect knowledge about solar terms in winter solstice.

Winter solstice, also known as "Winter Festival", "Dragon Solstice Festival" and "Asian New Year", is an important solar term in the China lunar calendar and a traditional festival of the Chinese nation. The winter solstice is the earliest of the 24 solar terms, which originated in the Spring and Autumn Period. In ancient China, the earth gauge was used to observe the sun and determine the winter solstice. The time is between 65438+February 2 1 and 23 in the Gregorian calendar every year. From winter to sunrise, the sun's direct ground position reaches the southernmost point of the year, almost directly to the Tropic of Capricorn (23 26' south latitude); The northern hemisphere has the least sunshine, 50% less than the southern hemisphere; In the northern hemisphere, the shortest day, the farther north, the shorter the day.

Winter solstice is the earliest of the 24 solar terms, but most people don't know that the origin of winter solstice actually comes from the planning of a national capital. As early as more than 3,000 years ago, Duke Zhou began to measure the shadow with the earth gauge method and measure the position of the world in Luoyi. This was a move of political significance at that time, but it became one of the festivals that affected future generations for thousands of years.