Why lay eggs at the vernal equinox?

It is an ancient tradition to divide eggs in spring, which is one of the customs of ancient farmers in China at the vernal equinox. The vernal equinox is one of the 24 solar terms, which generally appears on March 20th or 2 1, indicating that day and night are equally divided, and the sun shines directly on the equator of the earth, which is a natural phenomenon.

Traditionally, people erect raw eggs at the vernal equinox, which is called "vernal equinox eggs". According to legend, if we can successfully make the eggs stand up, it will herald good luck and a bumper harvest in a year. This tradition has lasted for thousands of years and has also become a cultural symbol and folk custom.

From a scientific point of view, there is no special scientific basis for dividing eggs in spring. In fact, raw eggs can stand up at any time, as long as the surface is relatively stable and the eggshell is relatively hard. The key to laying eggs lies in the surface shape of the eggshell and the position of the center of gravity. If the surface of the eggshell is smooth and the center of gravity is at the bottom of the eggshell, the egg can stand upright. Therefore, the success of egg separation in spring mainly depends on the quality and surface shape of eggs, not the solar terms themselves.

Although there is no scientific basis for separating eggs in spring, as a cultural tradition and folk custom, it has important historical and cultural value.