How many days is the night? How many days are there this year?

"Summer solstice waterfall night" instead of "summer solstice waterfall night". This Geng Day means "Geng Day", which means that it falls on the third Geng Day from summer to the future. There are still 25 days from the summer solstice in 2020;

Time from 2020 to the first Geng Day in Xia Hou, Hitachi:

June 26th, 2020 (Boxer Day)

Time from 2020 to the second Geng Day in Xia Hou, Hitachi:

July 6, 2020 (Geng Xuri)

Time from 2020 to the third Geng Day in Xia Hou, Hitachi:

July 2020 16 (Geng Shen Day)

Heavenly stems and earthly branches recorded the time in ancient times, and the word "Geng" in the three gengzi was the seventh word in the ten-day trunk of the numbers "A, B, C, D, E, Ji, G, Xin, Ren and Gui", which was repeated every 10 day on Geng Day.

According to the yearbook, "summer to sunset is on the third Geng day", which means "countdown from summer to Sunday" and then fall asleep on the third Geng day. The "Geng Day" here refers to the days prefixed with "Geng" in the ancient "Ganzhi Jiri Law". The almanac also stipulates that the first "Geng Day" after the solar term "beginning of autumn" is the day when the last volt begins.

Extended information:

Astronomical experts said that although the summer solstice indicates that the hot summer has arrived, it is not the hottest time, because the heat near the ground is still accumulating and has not reached the maximum. From mid-July to mid-August, the temperature is the highest in all parts of the country.

Calculating the first day of the summer solstice is one of the methods to calculate the third day of the summer solstice in China, which means that the third Geng Day is the first day of the first day.

Heavenly stems and earthly branches recorded the time in ancient times, and the word "Geng" in the three gengzi was the seventh word in the ten-day trunk of the numbers "A, B, C, D, E, Ji, G, Xin, Ren and Gui", which was repeated every 10 day on Geng Day.