Winter snow and winter cold
winter
Lidong
The Sun is located at 225 degrees ecliptic longitude. The festival is held in early November of the solar calendar.
"Lidong" is a solar term that marks the change of seasons, indicating that winter has begun. The word "winter" has the meaning of "end", spring ploughing and summer throughout the year, autumn harvest and winter storage, winter is the end of the field work, collect the harvested crops and fruits, enjoy a good harvest, rest and recuperate.
The days of the "Li Winter" festival are basically the same as the agricultural season phenomenon and winter climate in the middle and lower reaches of the Yellow River, however, winter has already entered in the northeast region, while the south is still in the middle of autumn.
The map shows people in the north collecting Chinese cabbage for the winter, and two fat pigs hint at a good day for a good year of porpoise.
snow
light snow
The Sun is located at 240 degrees ecliptic longitude. The festival is held in late November of the solar calendar.
"Light snow" is a solar term that marks climate change and reflects precipitation and temperature - the temperature drops and snowfalls, but it is not yet the season of heavy snowfall, so it is called "light snow". Light snow is a time when cold snaps and strong cold air activity are more frequent. Before and after the "light snow" solar term, the middle and lower reaches of the Yellow River began to snowfall, and the rivers and dams gradually froze, so the northern agricultural proverb has the saying "light snow is full of snow, the next year will be a good year", while the northeast has already snowflakes and rivers froze, and the snowfall in the southern region is two solar terms later. At this time, the middle and lower reaches of the Yangtze River gradually showed the early winter scene of "the lotus is no longer covered by rain, and the chrysanthemum remains still have proud frost branches".
In winter, everything in nature enters the "rest of winter" period, so the postal map shows the fruit people pruning the tree.
snow
heavy snow
The Sun is located at 255 degrees ecliptic longitude. The festival is celebrated in early December of the solar calendar.
Heavy snow and light snow are solar terms that reflect the trend of temperature and precipitation. "Large" refers to the degree of snowfall. The "heavy snow" solar term means that the temperature continues to drop, and goose feathers and snow will fall from the sky at any time, and there will be snow on the ground. At this time, the earth is frozen and the rivers are frozen. In the middle and lower reaches of the Yellow River, there is often a saying that "heavy snow does not seal the land, but three or five days", once it snows, it will freeze the river pond and snow to seal the earth, a northern scenery covered in silver makeup. The south will also enter the middle of winter at this time.
However, heavy snowfall is different from heavy snowfall. Heavy snowfall is not the largest. For example, in the middle and lower reaches of the Yellow River, the largest solar term of snow throughout the year is neither "light snow and heavy snow", nor "small cold, big cold", but "rain" solar term in spring.
The map shows children building snowmen on a snowy day.
winter
winter solstice
The Sun is located at 270 degrees ecliptic longitude. December 21 or 22 of the solar calendar.
"To" means the extreme, the most. "Summer solstice" and "winter solstice" are collectively called "two solstices", which not only represent the "extreme" of summer and winter in astronomy, but also reflect the "extreme" solar terms of sunshine length. On the day of the "winter solstice", the sun almost directly hits the Tropic of Capricorn, the shortest day and the longest night in the northern hemisphere, astronomically determined that this day is the beginning of winter in the northern hemisphere, so from the winter solstice day is "counting nine cold days". After the winter solstice, the direct sunlight gradually moves northward, and the days in the northern hemisphere become longer and the nights become shorter, which is the opposite of the summer solstice.
The postal map shows a child drawing a "99 Cold Map" at home.
small
Xiaohan
The Sun is located at 285 degrees ecliptic longitude. The festival is held in the first half of January of the solar calendar.
"Small cold" is one of the solar terms that directly reflects temperature changes. "Cold" means cold, indicating that the cold season of the year has entered; "Small" means that the degree of "cold" is not serious, and it is not yet the coldest time.
Xiaohan is in the "two nine", followed by "three nine, four nine", the weather will become colder and colder, until the "big cold" reaches the coldest level. So the agricultural proverb: small cold and big cold, cold into a ball.
The map shows children playing on the ice rink.
big
Big chill
The Sun is located at 300 degrees ecliptic longitude. The festival is celebrated in late January of the lunar calendar.
"Big cold" and "small cold" are solar terms that directly reflect temperature changes. "Cold" means cold, and "big" means that the degree of cold has reached the extreme. The cold season coincides with the "March 9 and 49", and the temperature drops to the lowest point of the year, which is the most severe season. At this time, the weather is very cold, dripping into ice. When there is snowfall, there is a world of ice and snow everywhere. People who are accustomed to working during the agricultural season often transport soil and miscellaneous fertilizer to the field at this time, called "wax fertilizer", so as to keep the wheat warm and safely winter. In life, people will buy "New Year goods" and make various preparations for the upcoming Spring Festival.
The postal map shows people in the southern region enjoying plums (in the southern region, plums bloom in the small cold season, and white plums and red plums are waiting to be released in the big cold season).