When are the first and last days? What's the date today? Introduction to dog days.

1, initial accommodation: July, 2022 16 to July, 25, 2022, *** 10 day;

2. Termination period: August 202215 ~ August 24, 2022, *** 10 day.

3. The three volts include "initial, intermediate and final volts", in which the initial and final volts are 10 days, and the days of intermediate volts are long and short, which may be 10 days or 20 days. If there are four Geng days between the summer solstice and beginning of autumn, there are 65,438+00 days in the middle, and if there are five days between the summer solstice and beginning of autumn. Therefore, the whole dog days will last either 30 days or 40 days.

4. According to China's traditional calculation method, the third Geng day from summer to the future is the beginning of "first lodging", the fourth Geng day is the beginning of "intermediate lodging", and the first Geng day after beginning of autumn is the beginning of "last lodging". Because every Geng day is 10 days apart, the stipulated time of the first day and the last day is 10 days. The number of days in midsummer is long or short, which may be 10 or 20 days, depending on the date of the third Geng Day (the first autumn) after the solar term of summer solstice every year.