On the spring and autumn equinoxes, one of the twenty-four solar terms, and on the Dragon Boat Festival, there is a custom of setting eggs. Egg standing means: choose a smooth and well-proportioned fresh egg that is just four or five days old, and gently place it on the table to stand it upright.
The meaning of the vernal equinox is: "In February, the equinox is half, which is half of the ninety days, so it is called the equinox." This means that day and night are equally divided on this day, each lasting twelve hours. In ancient times, spring was from the beginning of spring to the beginning of summer. Starting from the vernal equinox, the direct position of the sun gradually moves northward, and the length of day and night in the northern and southern hemispheres also changes accordingly. The days are longer in the northern hemisphere and the nights are shorter in the southern hemisphere.
Therefore, some people say: "The vernal equinox is the half-phase of yin and yang. Therefore, the day and night are equally cold and hot." The vernal equinox is a day when the day and night are equally long in the northern and southern hemispheres. The earth's axis is tilted at 66.5 degrees and the earth revolves around it. The orbital plane of the sun's revolution is in a state of relative balance of forces, which is conducive to egg erection.
In addition, according to historical records, there is also the tradition of setting eggs at the autumnal equinox, which originated in China 4,000 years ago. It is a custom that was developed to celebrate the coming of autumn.
According to astronomical experts, the days and nights on the day of the autumnal equinox are balanced, and the eggs stand most stably. Of course, some people believe that erecting eggs has nothing to do with the autumnal equinox, and eggs can be erected on any day of the year. In addition, in some folk places in my country, interesting games or competitions of "erecting eggs" will be held on the autumnal equinox.
Dragon Boat Festival actually has a festival food custom of standing eggs. At twelve o'clock at noon on the day of Dragon Boat Festival, the masculinity and righteousness are extremely concentrated, so people think that eggs that are usually difficult to stand upright can be erect at this time. On the ground, the reason is that on the day of the Dragon Boat Festival, the sun shines in the northern hemisphere. At noon, the gravity of the sun and the gravity of the earth pull each other, making it easy for the eggs standing on the ground to reach balance and stand up.
In fact, the Dragon Boat Festival is one of the important traditional festivals among the people. There have been many customs spread since ancient times, such as eating rice dumplings, rowing dragon boats, planting mugwort, wearing sachets, drinking realgar wine, and taking noon water. etc. In the game, "Egg Standing" and "Floating Water Needle" are the most popular.