Traditional Culture Encyclopedia - The 24 Solar Terms - When is the vernal equinox?
When is the vernal equinox?
The vernal equinox, also known as the "day-to-day" and "day-to-night equinox" in ancient times, the sun reaches 0 on March 20th or 2 1 day every year. According to the "Twenty-four solar terms": "In mid-February, it is divided into half, which is half of ninety days, so it is called minutes." Another article, Spring and Autumn Stories, Yin and Yang in and out, said: "At the vernal equinox, Yin and Yang are also half-phase, so day and night are cold and summer." Therefore, the significance of the vernal equinox, first, refers to the equal division of day and night, each of which is 12 hours; Second, in ancient times, it was spring from beginning of spring to long summer, and the vernal equinox happened to be in the three months of spring, and spring was equally divided. In ancient China, the vernal equinox was divided into three periods: "One is to wait for the arrival of the Yuan bird; Second, wait for Lei Nai to make a sound; Third, wait for electricity. " In other words, after the vernal equinox, swallows will fly from the south, and when it rains, the sky will thunder and lightning. March 2 1 day is the vernal equinox among the 24 solar terms, and the vernal equinox solar terms begin when the sun runs to 0 degrees (vernal equinox). A day is half of spring, so it is called vernal equinox. On the vernal equinox, the sun shines directly at the equator, and day and night are almost equal. Then the direct sunlight position gradually moved northward, and the days were long and the nights were short. 20 10 Spring break this year is at 6: 48 on February 4th.
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