关于夏天中伏天数的探究

A study on the number of days of Zhongfu in the summer

通过给出夏至节气后各日日序的方法,得到了判断夏天中伏天数的一般规律.据此可知,从长期看来,夏天中伏为20天的年份占71.37%,中伏为10天的年份占28.63%.

We present a general method to determine the period of Zhongfu（ second of the three ten-day periods of the hot season,sometimes lasting twenty days instead of ten） by accounting the daily order after the summer solstice. Therefore,in the long term,the 20-days of Zhongfu accounts for 71.37%. And the 10-days Zhongfu accounts for 28.63%.