1, the solstice of this summer can't be said to be ignorant. In the summer of the third year, the solstice will enter Volta. "This means counting from the summer solstice to the third Geng day, which is the first day of the first autumn. In our country, the counting of years, months and days is different from that of western figures, but the dry counting method is adopted, that is, "A, B, C, D, E, G, G, G" is paired with "Zi Chou Mao Yinchen was in Xu Hai at noon" to record the years, months and days, so there will be a "G" every ten days. In this case, if the summer solstice in a certain year is a new day, that is, the second day of Geng Day, it will take 29 days to reach the third Geng Day, and if the summer solstice in a certain year is Geng Day, it will only take 20 days to reach the third Geng Day. If we say that it takes about 20-29 days after the summer solstice.

2. Winter begins on the solstice. "The number of winter solstice days is 998 1 day, which is the end of cold."