How many days are there in one volt, two volts and three volts?

V: July 2022 16-July 25, 2022, *** 10 day; V: July 26th to August, 2022 14, ***20 days; Sanfu: August 2022 15-August 24, 2022, *** 10 day. How to calculate the beach, seaside, beach, seascape and blue sky in dog days? The dog days are divided into three volts, one of which is 10 days, calculated according to the ten days of dry weather. Then it is divided into three days, and the first day begins on the third day after the summer solstice solar term. For example, the summer solstice in 2022 is June 2 1, and the dry day of this day is Xinri. 28 days later, it is the third boxer day. Therefore, ten days after the beach, seaside, beach, seascape and blue sky in 2022, it was another Geng day, that is, on July 26, it entered the second volt (middle volt); Ten days later, it was another watch, but we haven't arrived in beginning of autumn yet. In ten days (and 20 days this summer), it will be the first watch after beginning of autumn. There are four Geng days between the summer solstice and the beginning of autumn, with 10 days in summer, 20 days in five Geng days and 20 days in 2022, that is, 15 days in August.