What are the 24 solar terms of 20 18?

February 4th, beginning of spring, February rain 19, March 5th, March 2nd1vernal equinox, April 5th, Qingming Festival, April 20th, Grain Rain?

May 5th is a long summer, May 2nd1day is full, June 6th is Mangzhong, June 2nd1day is summer solstice, July 7th is Xia Xia, and July 23rd is summer?

Beginning of autumn August 7th, long summer August 23rd, Bailu September 8th, autumnal equinox September 23rd, cold dew 65438+1October 8th, first frost 65438+1October 23rd.

Beginning of winter165438+1October 7, Xiaoxue165438+1October 22, heavy snow 65438+February 7, winter solstice 65438+February 22, slight cold 65438+/

Extended data

Historical origin

In ancient China, the sundial was measured by earth gauge, and the longest sun shadow was defined as "sun to day" (also called long day to day, long day to day, winter to day), and the shortest sun shadow was "short day to day" (also called short day to day and summer to day). One day in spring and autumn is the same length of day and night, which is designated as "vernal equinox" and "autumnal equinox". There were only four solar terms in Shang dynasty, but it developed to eight in Zhou dynasty and was completely established in Qin and Han dynasties. In BC 104, the taichu calendar written by Deng Ping officially set 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms.

The names of the twenty-four solar terms first appeared in Tian Zi Xun of Huainan in the Western Han Dynasty, and the concepts of Yin and Yang, four seasons, eight places, twelve degrees and twenty-four solar terms were also mentioned in the Preface of Historical Records Taishi Gong. During the period of Emperor Wu of the Han Dynasty, Luo compiled solar terms into the calendar, stipulating that the month without neutral gas was the last month of leap month.

Baidu encyclopedia: 24 solar terms