The full text of Song of the Twenty-Four Solar Terms

The full text of "Song of the Twenty-Four Solar Terms" is: The spring rain shocks the spring and clears the valley, and the summer is full of awns and the summer heat is connected.

There is dew in autumn, cold frost in autumn, and snow in winter and slight severe cold in winter.

The two sections of each month do not change, with a difference of one or two days at most.

In the first half of the year, it was June and twenty-one, and in the second half of the year, it was eight and twenty-three.

Extended information: Origin of the festival; As early as the Spring and Autumn Period and the Warring States Period, ancient China used Tugui to measure the sundial (that is, erect a pole on a flat surface to measure the length of the shadow of the sun at noon) to determine the four solar terms of the spring equinox, summer solstice, autumnal equinox, and winter solstice.

In a year, the day with the shortest shadow of Tugui at noon is the summer solstice (also known as the "short day solstice" or "short solstice"), and the longest day is the winter solstice (also known as the "long day solstice" or "long solstice")

, the one with moderate shadow length is the vernal or autumnal equinox.

The solar terms are described in the book "Shangshu" from the Spring and Autumn Period.

In the Shang Dynasty, there were only four solar terms, but by the Zhou Dynasty, there were eight solar terms.

The name of the twenty-four solar terms was first seen in "Huainanzi Tianwenxun" by Liu An of the Western Han Dynasty. The "On the Essentials of Six Schools" in "Historical Records Taishi Gong's Preface" also mentioned yin and yang, four o'clock, eight positions, twelve degrees, two

Concepts such as the fourteen solar terms.