What activities are there during the vernal equinox?

The custom activities in the spring equinox include laying eggs, offering spring sacrifices, eating spring vegetables and sticking birds' mouths in beginning of spring.

1, spawning

Every spring equinox, tens of millions of people all over the world are doing "vertical egg" experiments. This is the so-called "China custom". Its play is really simple and interesting: choose a smooth and symmetrical fresh egg that has just been born for four or five days, and gently stand it on the table. Although there are many losers, there are also many winners. The vernal equinox has become the best time for vertical egg games, so there is a saying that when the vernal equinox arrives, the eggs will be beautiful. The eggs that stand up don't look good.

The mystery of vertical eggs

First of all, the vernal equinox is a day with the same length of day and night in the northern and southern hemispheres. The inclination of the earth's axis is 66.5 degrees, which is in a relatively balanced state with the earth's orbital plane around the sun, which is beneficial to vertical eggs. Secondly, the vernal equinox is in the middle of spring, which is lukewarm, colorful, comfortable, quick-thinking, agile and easy to succeed in laying eggs.

More importantly, the surface of the egg is uneven and there are many protruding "hills". The height of "mountain" is about 0.03mm, and the distance between peaks is 0.5-0.8mm. According to the principle that three points form a triangle and a plane is determined, as long as three "mountains" and the triangle formed by these three "mountains" are found and the center of gravity of the egg passes through this triangle, the egg can stand upright.

In addition, it is best to choose eggs 4 ~ 5 days after birth, because at this time, the yolk of the egg is slack, the yolk sinks, and the center of gravity of the egg drops, which is conducive to the erection of the egg.