Is the date of the solstice winter lunar calendar fixed?

Solstice in winter and Tomb-Sweeping Day are solar terms and festivals in China. On the solstice of winter, people will eat jiaozi and glutinous rice balls to welcome the arrival of the festival solar terms. So is the date of the solstice winter lunar calendar fixed? What does the winter solstice solar term mean? Let's use the old almanac to understand and analyze this!

Is the date of winter solstice fixed in the lunar calendar? No, the winter solstice is based on the solar calendar, and there is no fixed time in the solar calendar and the lunar calendar. This is because the official calendar in China uses the solar calendar, which is still used in very low rural areas. This lunar calendar is a combination of yin and yang, with a monthly cycle in the middle and a solar cycle in the twenty-four solar terms. It should be said that it is the solar calendar. Every Saturday and 1 1 day in the first half of the year, and every 8th and 23rd day in the second half of the year are related to the solar calendar, because people in China call it the lunar calendar, and solar terms are mixed with the lunar calendar. Most people think that solar terms are the lunar calendar. Twenty-four solar terms are the original cultural heritage of working people in China, which can reflect the changes of seasons, guide agricultural activities and affect the food, clothing, housing and transportation of thousands of households. Since 2000, the main political Z activity center in China has been concentrated in the Yellow River Basin, and the 24 solar terms have been established on the basis of the climate and phenology in this area. Due to the vast territory and changeable terrain of China, the 24 solar terms are only a reference for many regions. The twenty-four solar terms are divided according to the position of the sun on the ecliptic (that is, the orbit of the earth around the sun). Depending on the sun starting from the vernal equinox (longitude zero, at this moment the sun shines vertically on the equator), every advance of 15 degrees is a solar term; After a week's operation, I returned to the vernal equinox, which is a tropical year with 360 degrees, so it is divided into 24 solar terms. The dates of solar terms are relatively fixed in the solar calendar. For example, beginning of spring in the solar calendar always falls between February 3rd and 5th. However, in the lunar calendar, the date of solar terms is not easy to determine. Take beginning of spring as an example. It can be the first day of the lunar calendar in the previous year, 65438+February 15, and the latest is the first month, 15.

Summarized the meaning of solar terms from winter solstice. The solstice of winter means that the cold winter is coming. In winter solstice, the longitude of the sun is 270 degrees. On the solstice of winter, the sun shines almost directly on the tropic of Capricorn. Our northern hemisphere has the shortest day and the longest night, and it has begun to enter several cold days. Astronomy stipulates that this day is the beginning of winter in the northern hemisphere. After the winter solstice, the direct sunlight gradually moved northward, and the days in the northern hemisphere gradually became longer. As the proverb goes, eating noodles on the solstice in winter will make the day longer.

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