What is the number? Two volts and three volts.

Fu Tou 10 day, Er Fu 20 days, Sanfu 10 day, a total of ***40 days.

One volt: July 2022 16-July 25, 2022, *** 10;

Er Fu: July 26-August 2022 14, ***20 days;

Dog days: August 202215-August 24, 2022, *** 10 days.

In the midsummer of 2022, July 26th to August 14 is the hottest day. The dog days consist of the first, middle and last three days, with the first being 10 day, the last being 10 day and the middle being 10 day or 20 days, so the dog days are divided into 30 days or 40 days. The dog days of the year should be calculated by combining the first day and the last day.