Twenty-four solar terms a year.

The spring rain shakes the spring and clears the valley, and the summer is full of mountains and summers. Autumn dew, autumn frost, little snow in winter and cold in winter. The first half of the year is June 2 1 day, and the second half is August 23. The dates of the two festivals each month are fixed, with a maximum difference of one or two days.

24 solar terms is: beginning of spring, rainy, startled, vernal equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Slight Summer, beginning of autumn, Early Summer, White Dew, Autumn Equinox, Cold Dew, Early Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold and Severe Cold.

Twenty-four solar terms were summed up by the working people in ancient China, which reflected the law of the solar cycle, and the ancients carried out agricultural activities accordingly. On May 20th, 2006, "Twenty-four solar terms" as a folk custom project was approved by the State Council to be included in the first batch of national intangible cultural heritage list.