What is the origin of the heavy snow solar term in 2017
4hw.org: Blizzard is the last solar term in China's traditional 24 solar terms, which indicates that winter has entered the coldest world. Generally speaking, Blizzard solar terms are between December 6 and 8, based on the solar calendar of that year. What's the date of 2017 Blizzard solar terms? What's the origin of Blizzard solar terms? Let's take a look at it!
I. what's the date of heavy snow
Solar calendar: December 7, 2017 lunar calendar: October 20 Thursday
Calculation formula of heavy snow solar term time:
[Y*D+C]-L
Interpretation of the formula: y = the last two digits of the number of years, d = 0.2422, l = leap years, C = 7.18 in the 21st century, and 7.9 in the 20th century.
For example, the snow date in 2088 = [88 & times; 0.2422 + 7.18] - [88 / 4] = 28-22 = 6, and the snow on December 6.
Exception: 1954 calculation plus 1 day.
II. Origin of heavy snow solar term
Heavy snow solar terms, the sun's yellow longitude reaches 255 degrees. Heavy snow, as the name suggests, has a lot of snow. The ancients said: 'big, Sheng also, so far and snow Sheng also'. At this time, snow often falls in a wide range.
At this time, the lowest temperature in most areas of our country has dropped to 0 ℃ or below. Often in the front of strong cold air cold and warm air confrontation area, there will be heavy snow, or even blizzard. It can be seen that the term of heavy snow refers to the beginning time and amount of snow during this period. Like the terms of light snow, rain and grain rain, it directly reflects the term of precipitation.
There are three seasons in the snow season: 'one is when the bunting doesn't sound; the other is when the tiger begins to make friends; the third is when the litchi comes out. 'it means that the cold weather makes the trumpet bird no longer chirp; it's the peak period of Yin Qi. The so-called boom and bust, the Yang Qi has sprouted, and the tiger has begun to courtship behavior;' Liting 'is a kind of orchid grass, which feels the sprout of Yang Qi and draws out new buds.
It is often said that 'auspicious snow means a good year'. Winter snow covers the land, keeping the temperature around the ground and crops from falling very low due to the cold current. Winter crops create a good winter environment. When the snow melts, the soil moisture content is increased to meet the needs of crop growth in spring. The content of nitrogen compounds in snow water is 5 times of that in common rain water, which has a certain effect on fertility. There is a saying that "this year's wheat cover is made of three layers of quilt, and next year's bread is on the pillow".