When it comes to dog days, old people know it, but young people don't necessarily know it. In fact, every year's dog days have a specific period of time. It's not the summer that leads to dog days. So how to divide the dog days? Let's take a look at the calculation schedule of dog days!
How to divide the dog days in 2019
The dog days in 2019 will start on July 12 and end on August 10, totaling 40 days.
How to calculate dog days
In dog days, one volt is ten days, which is calculated according to the number of ten days. Therefore, the division of the dog days is: the third day after the summer solstice, Geng day, is the beginning day of the first dog days. For example, the summer solstice in 2006 is June 21 of the Western calendar year, and the dry day of this day is Xinri. 28 days later, it is the third Geng day. Therefore, July 20 of 2006 is the beginning of the first volt; ten days later, it is another Geng day, that is, July 30, it is the second volt; Ten days later, there is another day of Geng, the first day of Geng after the beginning of autumn, that is, on August 9, the third day of Geng, if it is in 2007, July 15 is the third day of Geng, that is, the beginning of the first day of Geng, and ten days later, there is another day of Geng, that is, on July 25, the second day of Geng; Ten days later, there will be another Geng day, but before the beginning of autumn, another ten days later (there will be 20 days in this year's Zhongfu), another Geng day, and the first Geng day after the beginning of autumn, that is, on August 14, it will enter the third Fu. That is to say, every year after the dog days, it is very hot, especially the 10 days (sometimes 20 days) in the middle of the dog days. There is a saying among the people that the cold is in March and the hot is in the middle.
Heart algorithm of the 21st century -- Geng RI formula: GR = (D - [y / 4]) mod 10 (GR Geng RI, d even year 1 odd year 6, y year, [] rounding, mod remainder)
For example, in 2006, GR = (1 - [6 / 4]) mod 10 = 0 (10), initial July 20, intermediate July 30 and final August 9.
Specific time of dog days in 2019
Initial Ambush: July 12 - July 21
Day 1 July 12, 2019
Day 2 July 13, 2019
Day 3 July 14, 2019
Day 4 July 15, 2019
Day 5 July 16, 2019
Day 6 July 17, 2019
Day 7 July 18, 2019
Day 8 July 19, 2019
Day 9 July 20, 2019
Day 10 July 21, 2019
Zhongfu: July 22 - August 10
Day 1 July 22, 2019
Day 2 July 23, 2019
Day 3 July 24, 2019
Day 4 July 25, 2019
Day 5 July 26, 2019
Day 6 July 27, 2019
Day 7 July 28, 2019
Day 8 July 29, 2019
Day 9 July 30, 2019
Day 10 July 31, 2019
Day 11 August 1, 2019
Day 12 August 2, 2019
Day 13 August 3, 2019
Day 14 August 4, 2019
Day 15 August 5, 2019
Day 16 August 6, 2019
Day 17 August 7, 2019
Day 18 August 8, 2019
Day 19 August 9, 2019
Day 20 August 10, 2019
Last: August 11 - August 20
Day 1 August 11, 2019
Day 2 August 12, 2019
Day 3 August 13, 2019
Day 4 August 11, 2019
Day 5 August 15, 2019
Day 6 August 16, 2019
Day 7 August 17, 2019
Day 8 August 18, 2019
Day 9 August 19, 2019
Day 10 August 20, 2019