Spring Equinox

The vernal equinox is one of the twenty-four solar terms and the fourth solar term in spring. The festival falls on March 19-22 of the Gregorian calendar every year. The vernal equinox is of great significance in astronomy. On the day of the vernal equinox, the day and night in the northern and southern hemispheres are equal. Since this day, the direct position of the sun continues to move from the equator to the northern hemisphere. Days in the northern hemisphere begin to be longer than nights, and the opposite is true in the southern hemisphere. In terms of climate, there are also obvious characteristics. Except for the Qinghai-Tibet Plateau, northeast, northwest and northern parts of North China, China has entered a bright spring.