dog days are divided into first, middle and last. It is the highest, humid and muggy day of the year between the light summer heat and the beginning of autumn. When does the last dog days, as the last period of dog days, begin this year? How many more days? Then, let's go and have a look with Xiaobian.
when did the dog days begin at the end of 2016? The third dog days are determined according to the "ganzhiji day" in ancient China. The first "Geng" day from the beginning of autumn is the beginning of the last dog days (the last dog days). The whole last dog days are from the first Geng day after the beginning of autumn to the day before the second Geng day after the beginning of autumn. The second Geng day after the beginning of autumn is set as ambush, that is, the end of the ambush. The last start time of 2016 is August 16.and
what day does the dog days begin in 2016? In 2016, there were 40 dog days in total, including the "first dog day" on July 17, from which the dog days began. "Moderate ambush" on July 27, "last ambush" on August 16, and "ambush" on August 25. First Ambush: from July 17, 2016 to July 26, 2015; middle Ambush: from July 27, 2016 to August 15, 2015; last Ambush: from August 16, 2016 to August 25, 2015; at the end of 2016, the ambush lasts for 10 days.and
. Introduction to the ambush: the ambush is determined according to the "trunk and branch period day method" in ancient China. Every year after the summer solstice, the third Geng day (referring to the day with the word "Geng" in the ganzhiji day) is the first fall, the fourth Geng day is the middle fall, and the first Geng day after the beginning of autumn is the last fall, which is collectively called the third fall. According to the Gregorian calendar, it appears from mid July to mid August. At this time, most of China is the hottest season of the year.
algorithm for dog days: dog days, one volt is ten days, which is calculated according to the number of ten days. Therefore, it is divided into three dog days, that is, the Geng day on the third day after the summer solstice is the beginning day of the first dog day. For example, the summer solstice in 2006 is June 21 in the Western calendar year. The dry day on this day is Xin day. After 28 days, it is the third Geng day. Therefore, July 20 in 2006 is the beginning of the first volt; Ten days later, another Geng day, that is, July 30, entered the second volt; Ten days later, another Geng day, and the first Geng day after the beginning of autumn, that is, August 9, entered the third volt; If it is 2007, July 15 is the third Geng day, which is the beginning of the first volt (the first volt); Ten days later, another Geng day, that is, July 25, entered the second volt (medium volt); Ten days later, there is another Geng day, but before the beginning of autumn, there is another Geng day after ten days (there are 20 days in the middle of this year), and it is the first Geng day after the beginning of autumn, that is, on August 14, it enters the third volt,. That is to say, after the dog days every year, it is very hot, especially in the medium ten days (sometimes twenty days), which is the hottest.and
have the folk saying that "the cold is in March and September, and the heat is in the middle".
21st century centroid algorithm - Geng RI formula: GR = (D - [y / 4]) mod10 (GR Geng RI, d even year 1 odd year 6, y year,  rounding, mod remainder)
initial GR plus 10 (not added except in 2084), medium GR + 20, last GR greater than 7 minus 1 and less than 8 plus 9 (exception minus 1 in 2096), such as GR = (1 - [6 / 4]) mod10 = 0 (10) in 2006, initial GR on July 20 The middle voltage is 30 and the last voltage is 9 August.
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