What do the first, second and third days of the twenty-four solar terms mean?

Solar terms are units for calculating the climate of the four seasons according to the lunar calendar. There are twenty-four solar terms in a year, and each solar term lasts fifteen days. In ancient times, five days were called "first class" and "third class" were solar terms, so a solar term was also called "third class". According to the climate characteristics and some special phenomena at that time, the ancient working people in China briefly summarized the "three climaxes" of each solar term.

Example:

In ancient China, beginning of autumn was divided into three periods: "A cool breeze blows gently; Second, wait for the white deer to be born; Third-class chilling. "

Cool wind: People will feel cool when there is wind. The wind at this time is different from the hot air in summer.

White dew falls: The earth will be foggy in the morning.

Cicada chirping: Cicada chirping in autumn is also chirping.

Extended data:

"Twenty-four solar terms" reflect the influence of the sun on the earth and belong to the solar calendar category. It is a knowledge system formed by observing the movement of the sun in a year and understanding the changing laws of the four seasons, climate and phenology in a year. It not only plays a guiding role in agricultural production, but also affects the food, clothing, housing and transportation of ancient people, and even cultural concepts. The current lunar calendar absorbs the solar terms of the trunk calendar as a supplement to the calendar, and is adjusted to conform to the tropic year through the leap method, forming a combined calendar of yin and yang.

According to the traditional calendar, there are two solar terms, three solar terms and five days in each month for twelve months in a year. Each solar term has a specific natural phenomenon, and the earliest complete record can be found in Yi Zhou Shu Shi Xun Jie. Let's share the three phases of several solar terms:

1, vernal equinox, the first time, the mysterious bird arrives; Second, Lei Nai speaks; Third, power on.

Swallows will fly from the south after the vernal equinox. When it rains, the sky will thunder and lightning.

2, Qingming third class: first class, contemporary; Second, voles become owls; Wait three times and the rainbow will see you.

Tung flowers are in full bloom, and the simple fragrance is pervasive. Tung flowers herald the grand occasion of spring. Yang is getting stronger and stronger, and voles are the most cloudy things, so they hide back in caves to escape the heat, and instead, quail birds who love to bask in the sun come out to exercise. Rains are plentiful and the air is fresh in Qingming Festival, so rainbows are very common.

3, everything is glorious, and the summer heat is coming. Three solar terms in summer: at the beginning, rotten grass turns into fireflies; Second, the soil is hot and humid; Third, when it rains heavily.

Fireflies often lay eggs on aquatic plants in summer, and the ancients mistakenly thought that it was rotten grass. In summer, fireflies fly in the empty mountains, the weather is hot and humid, the soil is wet, and thunderstorms often occur suddenly.

Cold dew is the earliest solar term with the word "cold" among the 24 solar terms. At first, invited Hongyan; Second, the sparrow enters the water as a clam; Third, chrysanthemums have yellow flowers.

In order to avoid the cold in winter, Hongyan flies south in droves, becoming the most representative symbol of autumn in the sky. Birds hide because of the cold. In late autumn and cold weather, clams breed in large numbers. In ancient times, people thought that the stripes of shellfish clams were very similar to those of birds, so they thought that clams were changed by birds. Chrysanthemums bloom in the cold dew, but they don't fade after frost.

Great cold is the last of the 24 solar terms in the whole year. At first, chickens began to milk; Second, the stork is ill; Third class, Shui Ze's abdomen is firm.

In the cold, hens began to hatch chicks, and eagles wandered in the sky, looking for food to spend the cold winter. At this time, it was freezing, and the water in the river became thick and hard ice.

Twenty-four solar terms and seventy-two climaxes are the crystallization of the accumulated experience and wisdom of ancient working people, full of natural rhythmic beauty and poetic between heaven and earth.

Baidu encyclopedia-24 solar terms