What is the vernal equinox?

The vernal equinox is the arrival of Yuan bird, in which Yuan bird refers to swallow. When the beginning of spring solar term comes, swallows will fly back from the south.

The second time, Lei Nai made a sound, and the rain in beginning of spring solar terms increased. At this time, the weather becomes hot and the air is humid. When it rains, the sky will thunder and lightning, so there will be a second "thunder and thunder".

Electricity is supplied because the rainfall increases obviously after the vernal equinox and solar terms, accompanied by lightning. At this time, people can often see lightning chopping from the clouds, so pay attention to safety when working in the field.

The vernal equinox, also known as the "ascending equinox", is one of the 24 solar terms and the fourth solar term in spring. The arrival of the vernal equinox means that spring has passed halfway. 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 day of the vernal equinox, the sun shines directly on the equator, and the northern and southern hemispheres are divided equally day and night. Since then, the direct position of the sun has continued to move from the equator to the northern hemisphere. In the northern hemisphere, the day begins to be longer than the night, while in the southern hemisphere, it is the opposite. Climatically, there are also obvious characteristics. After the vernal equinox, China has entered a beautiful spring except the Qinghai-Tibet Plateau, Northeast China, Northwest China and North China.

At the vernal equinox, the sun shines directly on the equator, and the length of day and night is equal, each being 12 hour. The climate of the vernal equinox is characterized by warm and sunny weather. At this time, China folks have the custom of flying kites, eating spring vegetables and laying eggs.