In ancient times, what solar terms were there before and after the vernal equinox?

The first solar term before the vernal equinox: fright. Corresponding date: March 5-6 in Gregorian calendar. The new solar term after the vernal equinox: Qingming. Corresponding date: around April 5 of Gregorian calendar.

The vernal equinox is one of the 24 solar terms and the fourth solar term in spring. The fingers do not match, the longitude of the sun reaches 0, and the festival is held on March 19-22 of the Gregorian calendar every year. The vernal equinox is of great significance in astronomy. On the vernal equinox, the northern and southern hemispheres are divided equally day and night. After that, the direct position of the sun continued to move from the equator to the northern hemisphere, and the days in the northern hemisphere began to be longer than the nights.

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. When the vernal equinox comes, the climate is mild, the rain is abundant and the sun is shining.

Meaning of chapter name:

The "vernal equinox" means half, that is, it is divided into two parts, day and night are equally divided, and the cold and summer are balanced. In addition, the vernal equinox also means sharing spring equally. Traditionally, it is spring from beginning of spring to long summer, and the vernal equinox is in the middle of three months in spring. Therefore, the vernal equinox was also called "Japan-China", "Day and Night Equinox" and "Midspring Moon" in ancient times.

At the vernal equinox, the sun shines directly at the equator of the earth, and day and night are almost equal. According to Yuan Wucheng's book "Twenty-four Solar Terms", "In mid-February, it is divided into 90 days and a half, so it is called division."

Another "Spring and Autumn Story" said: "The vernal equinox, Yin and Yang are also half-phase, so day and night are cold and summer." Lunar Book: "The bucket refers to the vernal equinox, which is about Sunday, and the northern and southern hemispheres are equally divided day and night (except the poles), which is also half of spring, hence the name vernal equinox."