When is the vernal equinox?

The vernal equinox is one of the solar terms on March 20th or 2 1 of the Gregorian calendar every year, which marks the official start of spring and is the equinox of the Gregorian calendar.

At this time, the time of day and night is equal, and then the day will get longer and longer, and the night will get shorter and shorter. Among the 24 solar terms, the vernal equinox is an important solar term in Xiaoyangchun, and it is also the time for everything to recover.

The vernal equinox is not only a physical time point, but also has rich cultural connotations and customs. In China, the spring equinox and solar terms are the traditional sacrificial season. People will worship their ancestors, sweep graves, burn incense and worship God, and express their respect and grief for their ancestors. There are seasonal customs in Jiangnan, such as climbing mountains, flying kites and turning incense, which symbolize the arrival of spring, peace in the four seasons, wealth and good fortune.

In addition to cultural customs, the vernal equinox is rich in scientific knowledge.

The occurrence of the vernal equinox is related to the orbit of the earth and the direct position of the sun, which can help us better understand the operation law of the solar system and the orbit of the earth.

As an important solar term, the vernal equinox is not only a time point, but also rich in cultural and scientific connotations. Feeling the charm of spring and the wonder of life is worthy of our in-depth exploration and understanding.