The 24 solar terms are respectively, and the order is as follows:

The Beginning of Spring, Rain, Waking of Insect, Vernal Equinox, Qingming, Grain Rain, Beginning of Summer, Xiaoman, Eawn, Summer Solstice, Minor Heat, Great Heat, Beginning of Autumn, and End of Heat , white dew, autumnal equinox, cold dew, frost, beginning of winter, light snow, heavy snow, winter solstice, minor cold, severe cold

Word definition:

Solar terms can be understood in two ways:

1. One of the twenty-four solar terms. Starting from Xiaohan, every 15° increase in the yellow longitude of the sun is another solar term. There are twenty-four solar terms: Xiaohan, Beginning of Spring, Jingzhe, Qingming, Beginning of Summer, Mangzhong, Xiaoshu, Beginning of Autumn, White Dew, Cold Dew, Beginning of Winter and Heavy Snow. Called the twelve solar terms.

2. A general term for the twenty-four solar terms. Solar terms are generally calculated based on the lunar calendar.

The earth orbits the sun once every 365 days at 5 hours, 48 ??minutes and 46 seconds (accurately), and it also rotates once every 24 hours. Since the orbital plane of the Earth's rotation is not consistent with the equatorial plane, but maintains a certain inclination, the position of the direct sunlight hitting the Earth is different throughout the year. In the northern hemisphere, when the sun shines directly at 23.5 degrees north latitude, it is called the summer solstice in astronomy; when the sun shines directly at 23.5 degrees south latitude, it is called the winter solstice; the summer solstice and the winter solstice mean that it has reached the middle of summer and winter. When the sun shines directly on the equator twice in a year, it is the vernal equinox and the autumnal equinox, which is the middle of spring and autumn. The days and nights are as long as each other in these two days. The eight solar terms that reflect the changes in the four seasons are: the beginning of spring, the vernal equinox, the beginning of summer, the summer solstice, the beginning of autumn, the autumnal equinox, the beginning of winter, and the winter solstice. Among them, the beginning of spring, the beginning of summer, the beginning of autumn, and the beginning of winter are collectively called "Four Lis", which means the beginning of the four seasons. There are five solar terms that reflect temperature changes: minor heat, major heat, extreme heat, minor cold, and major cold. There are seven solar terms that reflect weather phenomena: rain, grain rain, white dew, cold dew, frost, light snow, and heavy snow. There are four solar terms that reflect phenological phenomena: Jingzhe, Qingming, Xiaoman, and Eawn.