When is the date of the winter solstice?

What is the date of the winter solstice on 20 15?

Winter solstice: 2065438+February 22, 2005, lunar calendar 1 1 month 12.

Winter solstice is an important solar term in the China lunar calendar, and it is also a traditional festival of the Chinese nation. It is usually called the winter solstice? Winter Festival? 、? Eager for the festival? 、? By age? Wait a minute. 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 between 0 and 23 in Gregorian calendar 65438+February 265438.

On the solstice in winter, the position where the sun shines directly on the ground reaches the southernmost point of the year, almost directly on the tropic of Capricorn (23? 26')。 On this day, the northern hemisphere gets the least sunshine, 50% less than the southern hemisphere. The days in the northern hemisphere are the shortest, and the farther north they are, the shorter they are. Like the southernmost tip of China? Zengmu shoal (latitude 2? 33? ) The daytime of this day is 1 1 hour 59 minutes, Haikou is about1hour 55 minutes, Hangzhou is1hour 12 minutes, and Beijing is about 9 hours and 20 minutes. The northernmost part of China? Mohe County, Heilongjiang Province (latitude 52? 58? ) Only 7 hours and 34 minutes. After the winter solstice, the stars in the night sky are completely replaced by the winter stars. What about today? Into nine? . At this time, the southern hemisphere is in a hot summer.

More generally, there is a custom of eating jiaozi from winter solstice in northern China. As the saying goes:? When winter solstice comes, eat jiaozi. ? In the south, we eat jiaozi, but there are exceptions. For example, Tengzhou, Dongping, Wenshang, Qufu, Zoucheng and other places in Shandong, the custom of winter solstice is called Jiujiu, and the custom of drinking mutton soup on the same day is popular, which means driving away the cold.

Geographical significance

Astronomical coordinates

According to modern astronomical science, the sun moves to 270 degrees of the yellow meridian from the winter solstice, and the sun shines directly on the tropic of Capricorn (also known as the winter solstice daily line), and the sun is most biased towards the northern hemisphere. Therefore, the winter solstice is the longest day in the northern hemisphere. Precious? The longest day of the night. For all parts of the northern hemisphere, the winter solstice is also the day with the lowest sun height at noon all year round. As far as Beijing is concerned, the winter solstice day is only 9 hours and 20 minutes, and the height of the sun is only 26? 42? . After the winter solstice, the stars in the night sky are completely replaced by the winter stars. What about today? Into nine? .

Note: The polar axis passes through the center of the earth, connecting the north and south poles, and the included angle with the earth's orbital plane is 66.5? And what about the orbital plane of the earth's rotation? The equatorial plane is vertical.

Lunar reference

My divination is called the winter solstice. Yi Yue: My late king and even the Japanese were closed to the outside world, so business travel was no good.

On the day of winter solstice, the northern hemisphere gets the least sunshine, 50% less than the southern hemisphere. Beijing's daylight saving time is only over 9 hours. However, this day is the first day of counting nine, not the coldest time This is because there is atmosphere and moisture on the surface of the earth, which can store heat, isn't it? Save or lose? , what else? Accumulated heat? . From winter to the future, although the height angle of the sun gradually increases, it is a slow recovery process, and the heat lost every day is still greater than the heat received. Make ends meet? Situation. Have you arrived yet? Three or nine days? The accumulated heat is the least, the temperature is the lowest, and the weather is getting colder. If there is the influence of cold air at this time, the weather will be even colder. After that? Cold front? After that, the weather will gradually get warmer. So what? It's cold on March 9? And then what? Jiujiu? Summer calendar in January and February, most parts of China have entered the spring, then? Sunny day? .

Climatic characteristics

Astronomy regards the winter solstice as the beginning of winter, which is obviously late for most parts of China. Poetry cloud? The wind in the northwest has weakened the grass, and it has been freezing for several times, and there has been a sun. The time during the day is the shortest, but I see Jin Mei blooming. ? (Heshui Zuo) The solstice in winter is the shortest day in a year. From winter to the future, the direct point of the sun gradually moves northward, and the days in the northern hemisphere gradually become longer and the nights gradually become shorter. So, there is a saying. Eating noodles until winter can arrange a line a day. ?

Climatically, during the winter solstice, the average temperature in the northwest plateau is generally below 0℃, and the southern region is only about 6℃ to 8℃. Besides, the winter of solstice has begun? Count to nine? What will the winter solstice be like? Count to nine? The first day. About what? Count to nine? That's what the folk song says. Don't shoot in September, walk on the ice in March and April, watch the willows along the river in May and June, open the river in July and September, come to Yan in August and September, and take the cattle for a walk in September and September. ? However, in the southwest low-altitude valley area, even in the coldest local165438+ in early October, the average temperature is still above 10℃. It can be said that autumn goes and spring comes, and there is no winter all year round.

China ancients divided the winter solstice into three stages:? Wait for earthworms to knot; Second, wait for the elk horn to solve; Wait for the spring to move. ? Legend has it that earthworms are creatures with yin bending and yang stretching. At this time, although the yang has increased, the yin is still very strong, and the earthworms in the soil are still curled up. Elk and deer belong to the same family, but yin and yang are different. The ancients thought that the elk's horns were facing the afterlife, so they were cloudy, and the winter solstice was born in the sun. The elk felt that the yin gradually receded and solved their horns. Because of the birth of yang, the spring water in the mountain can flow and be warm at this time.

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