In 2022, the subduction time was 16 at 0:00:00 in July, and the first subduction time was July 25th, * * * ten days.

The first day of 2022: from July 16 to July 25, 10.

Noon in 2022: July 26th to August 14, 20 days.

End of 2022: August 15 to August 24 10 days.

Entering volts means entering "three volts". There is a folk proverb, "The first night falls in summer", which is the basis for establishing the first autumn. The almanac stipulates that "the number of volts starts from the third day of summer", that is to say, "it starts to count down from summer" and begins to fall on the third "Geng Day". The "Geng Day" here refers to the days prefixed with "Geng" in the ancient "Ganzhi Jiri Law".

There are five Geng days between this summer and beginning of autumn, which are June 26th (Geng Xuri), July 6th (Geng Shenri), July 16 (Geng Wuri), July 26th (Chen Geng Day) and August 5th (Geng Yinri), so there are 20 days in this summer, and the whole dog days are always *.