When is spring?

The vernal equinox, the fourth of the 24 solar terms, refers to the handle, and a day is divided into days and nights. 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". In ancient times, it was also called "Japan-China", "Day and Night" and "Mid-spring Moon".

The spring half is the vernal equinox, the fourth solar term in the 24 solar terms, the stalk refers to the base, and the day is divided into equal parts. 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". In ancient times, it was also called "Japan-China", "Day and Night" and "Mid-spring Moon".

The vernal equinox is an important solar term, which is of great significance in astronomy: the northern and southern hemispheres divide the day and night equally. In climate, it also has obvious characteristics. Since then, the direct position of the sun has continued to move from the equator to the northern hemisphere. The day in the northern hemisphere began to be longer than the night, and the day in the southern hemisphere began to be shorter than the night.

During the spring equinox, China has entered a bright spring except the Qinghai-Tibet Plateau, Northeast China, Northwest China and North China. At this time, the climate is mild, the rain is abundant and the sun is shining, and the wintering crops in most parts of China enter the spring growth stage.

The significance of the vernal equinox, first, refers to the equal division of day and night, each of which is 12 hours; Second, the vernal equinox is in the middle of spring (from beginning of spring to Changchun), and the spring is equally divided.