What do the three phases of solar terms mean? What are the three stages of the vernal equinox?

The vernal equinox is the fourth solar term after entering spring, and it is also the solar term that divides spring into two parts. After the vernal equinox, it will bid farewell to the cold breath left by winter and usher in a warmer spring day by day. So, what do the three solar terms mean? What is the vernal equinox? Let's take a look with Bian Xiao!

What does the solar term mean?

As we all know, there are 24 solar terms, including 12 months, and each solar term is 15 days. In China, five days is a cycle and three cycles are a solar term, so a solar term is also called three cycles. According to the climate characteristics and some special phenomena at that time, the working people in ancient China named the three phases of each solar term to express the characteristics of the weather at that time concisely and clearly.

What are the three stages of the vernal equinox?

In ancient China, the vernal equinox was divided into three periods: "First, waiting for the arrival of mysterious birds;" Second, wait for Lei Nai to make a sound; Third, wait for electricity. " After the vernal equinox, swallows began to fly back from the south. When it rains, the sky will thunder and lightning. The flower letter represented by the third phase of the vernal equinox is: "Haitang Phase I, Pear Phase II, Magnolia Phase III." Three flowers bloom, ten thousand flowers bloom, and a hundred flowers compete for favor, all of which are love. The vernal equinox is recorded in the ancient calendar of China: "Three days before the vernal equinox, the sun entered the equator".

According to the "Twenty-four solar terms": "In mid-February, it is divided into half, which is half of ninety days, so it is called minutes." Another article, Spring and Autumn Stories, Yin and Yang in and out, said: "At the vernal equinox, Yin and Yang are also half-phase, so day and night are cold and summer." There is a "Li Mingshi Yi" cloud: "The dividing line, the point where Huangchi intersects, the sun is here, and the day and night are equally divided." Therefore, the significance of the vernal equinox, first, refers to the equal division of day and night, each of which is 12 hours; Second, in ancient times, it was spring from beginning of spring to long summer, and the vernal equinox happened to be in the three months of spring, and spring was equally divided.

What are the characteristics of solar terms after the vernal equinox?

At the vernal equinox, the direct point of the sun is on the equator, and then the direct point of the sun continues to move northward, so the vernal equinox is also called the ascending equinox. At the vernal equinox, theoretically speaking, the length of day and night is equal in most parts of the world (see twilight), and the special phenomenon that "the sun circles on the horizon all day" can be observed near the North Pole (90 north latitude) and the South Pole (90 south latitude). After the vernal equinox, the days in the northern hemisphere are long and the nights are short (the days are longer than the nights), and the days in the southern hemisphere are short and the nights are long (the days are shorter than the nights). After the vernal equinox, it began to be extremely daytime near the North Pole, and its scope gradually expanded. Near the Antarctic, the extreme day ends and the extreme night begins, and the scope gradually expands.