A few days, two days, three days

Volt 10 day, volt 10 day or 20 days, volt 10 day.

The time of accommodation is not fixed every year, and the length of accommodation is also different. You need to check the almanac to calculate it. To put it simply, we can use the formula of "the third boxer in the summer solstice" to express the lodging date, that is, from the third boxer day after the summer solstice, the initial lodging is 10 day, the intermediate lodging is 10 day or 20 days, and the final lodging is 10 day.

In ancient China, the "trunk-branch calendar" was popular, and 60 groups of different names were used to record dates with 10 heavenly stems and 12 earthly branches, which were recycled. The day with the word "Geng" is called "Geng Day". The word "Geng" in Geng Day is the seventh word in "A, B, C, D, E, Ji, G, Xin, Ren, Gui" 10 day, and it is repeated every 10 day.

From the summer solstice, according to the arrangement of trunk and branch dates, the third Geng Day is the first, the fourth Geng Day is the middle, and the 1 th Geng Day after beginning of autumn is the last.