Early 2020: July 16-July 25th.

Mid-2020: July 26th-August14th

End of 2020: August 15-August 24.

Dog days, one volt is ten days, which is calculated according to the number of days. Therefore, the dog days are divided into three days, that is, the Geng Day on the third day after the summer solstice is the beginning day of the first volt. After entering the dog days every year, it is very hot, especially in the middle ten days (sometimes twenty days), which is the hottest. There is a folk saying that "the cold is in the March 9th and the heat is in the middle".