The spring rain shocks the spring and clears the valley, and the summer is full of mountains and summer heat.

Autumn is exposed, autumn is cold and frost, and winter snow is small and winter is cold.

The two festivals are unchanged every month, with a difference of one or two days at most.

In the first half of the year, it was June 21, and in the second half, it was August 23.

Twenty-four solar term song, a small poem compiled for the convenience of remembering the twenty-four solar terms in the ancient Chinese calendar, has been circulated in many versions. Solar terms refer to the twenty-four seasons and climate. It is a calendar made in ancient China (note 1) to express seasonal changes and guide farming. It is the crystallization of long-term experience and wisdom of working people in ancient China.

Extended data:

The current twenty-four solar terms come from the fixed air law made more than 300 years ago, that is, the time that the sun goes through every 15 degrees along the yellow meridian from zero degrees is called "a solar term". It runs 360 degrees every year, and * * * experiences 24 solar terms, 2 times a month.

Among them, the first solar term of each month is "Festival", namely: beginning of spring, Jingzhe, Qingming, long summer, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Cold Dew, beginning of winter, Heavy Snow and Slight Cold, etc. 12; The second solar term of each month is "Zhongqi", that is, 12 solar terms such as rain, vernal equinox, Grain Rain, Xiaoman, summer solstice, great summer heat, summer heat, autumn equinox, first frost, light snow, winter solstice and great cold.