When does 49 days start?

Take the period from 20 17 to 20 18 as an example. Forty-nine days refers to the period of 201818-201816. Forty-nine days is the fourth nine days after the index nine. For example, every year from the Gregorian calendar 65438+February 2 1 or 22, counting nine days from the winter solstice, that is, taking nine days as a time period, marking the cold weather and temperature changes. Before February 30th, 65438+ was September 19, and reached 65438+ 10 on April 9th.

At the beginning of April 9th (take 20 17 to 20 18 as an example):

September 19: 201712.22 —— 201712.30.

Erjiu: 20171231-20181.

Sanjiu: 20181.9-20181.07.

Jiu Si: 20 18 18 October18-2018 65438+1October 26th.

May 9th: 2018 65438+1October 27th-2065438+February 4th, 2008.

June 9th: February 5th, 20 18-February 3rd, 2065438+08.

79: February18 —— February 22, 2065 438+08.

August 9: 20 18 February 23-2065438+March 3, 2008.

99: 2065438+March 4th, 2008 —— March 8th, 2065438+02/kloc-0.

There are many customs of "counting nine", among which "Jiujiu Song" is the most extensive and has a long history. As far as most parts of China are concerned, the weather was not the coldest in the past 29 days, but "1929, I can't reach it." At the end of April 9, it was almost the "great cold" solar term, so "on March 9, 49, the bitch froze to death." After May 9, the earth gradually rejuvenated and the weather gradually warmed from cold, so "May 969, look at the willows by the river; 7989, walking alone. " By 1999, it was already a "shock pad" solar term, so "1999 thundered for a long time." These songs skillfully use the phenological phenomena in nature and vividly reflect the laws of weather changes during the Ninth Five-Year Plan period.