Why do eggs stand upright during the Spring Equinox? Why do eggs stand upright during the Spring Equinox?

The Spring Equinox is one of the 24 traditional solar terms in my country. On this day, the sun shines directly on the equator, and the day and night are equal in the northern and southern hemispheres. Standing eggs upright is a traditional custom of the Spring Equinox that has lasted for more than 4,000 years. So why do we stand eggs upright on the Spring Equinox?

Why do we stand eggs upright during the Spring Equinox?

There is a related proverb "When the Spring Equinox comes, the eggs will stand up straight", which means that on the Spring Equinox, if you put an egg upright, it will stand straight.

Standing an egg on the Spring Equinox is just a custom that has been passed down from the past to the present. According to astronomers, the tradition of standing an egg on the Spring Equinox recorded in historical documents has been popular for more than 4,000 years to celebrate the arrival of spring and is now popular abroad.

In addition to standing eggs upright, you can also draw on the eggs with colored pencils to add more fun.

Why can eggs stand upright on the Spring Equinox?

In a real sense, an egg can be stood up on its end on any day, regardless of whether that day is the spring equinox or not.

If it really has something to do with the vernal equinox, it is because the earth's gravity is in a relatively balanced state on the day of the vernal equinox, and the magnetic fields at the earth's poles are also relatively stable, so it is easy for an egg to stand up.

The surface of the larger end of the eggshell is not that curved. Just put the larger end of the egg in contact with a flat surface, find the three fulcrums based on the principle of using three points to determine a plane, find the balance point, and try a few times, and you will be able to stand the egg up.

What is the principle of standing an egg on the spring equinox?

The principle of body weight balance. The specific gravity of the yolk is much greater than that of the egg white. The yolk is not on the central axis of the egg. Only the yolk of the egg laid by the chicken in the center of the earth is close to the center of the egg, which is conducive to standing up.

It is generally believed that during the vernal equinox, the sun is directly above the equator, the length of day and night in the northern and southern hemispheres is equal, and the earth's axis and the earth's orbit around the sun are in a state of relative balance, so it is easier to stand an egg upright on this day.

However, in fact, eggs can be stood upright on any day of the year. As long as the eggs are chosen carefully, there is no problem in standing upright for ten days or so.