Three or two branches, peach blossoms, bamboo and spring warm ducks, the prophet makes a solar term.

Three or two branches, peach blossoms, bamboo spring, warm ducks, and a solar term is the vernal equinox.

The poem "Peach Blossom Duck Prophet Outside the Bamboo" depicts a scene of spring, with peach blossoms in full bloom and ducks swimming by the river, which are typical features of spring. The prophet of warm duck in Chunjiang vividly expressed that the temperature rises in spring and the river warms, and ducks first perceive this change.

The vernal equinox is one of the twenty-four solar terms, which means that spring has passed halfway and summer is about to enter. The date of the vernal equinox is calculated according to the lunar calendar, usually on May 20th or 2 1 day in the solar calendar, which is the fifth solar term among the 24 solar terms in the lunar calendar. At the vernal equinox, the temperature rises gradually and the weather gets warmer gradually, which indicates the arrival of spring.

Some interesting things happened in the solar term of vernal equinox. For example, on the day of the vernal equinox, the time of day and night in the northern hemisphere is basically equal, that is to say, the time of day and night is 12 hour. The vernal equinox season is also the season when everything recovers. Plants began to grow, animals began to move, and everything was full of vitality. People also began to wear light clothes and enjoy the beauty of spring.

Characteristics of vernal equinox:

1. Time balance between day and night: The vernal equinox is a day with balanced time between day and night in the northern hemisphere. On this day, the sun shines directly on the equator, making the time of day and night basically equal around the world. This means that on the vernal equinox, the length of day and night is basically equal, which is 12 hour.

2. Seasonal climate: During the vernal equinox, the temperature rises gradually and the weather gets warmer gradually. This is an obvious feature of spring. During this period, the cold in winter has passed, the heat in summer has not yet arrived, the temperature is moderate and the weather is pleasant.

3. Astronomical position: At the vernal equinox, the position of the earth in the orbit of revolution is between the ecliptic and the equator, which means that the direct position of the sun is also near the equator. This position makes the day and night time in the northern hemisphere basically equal, which is also the main reason for the warm climate.

4. Biological activities: At the vernal equinox, the earth begins to awaken and everything recovers. Plants began to sprout and animals began to move. This period is characterized by vitality. The morning and evening of the vernal equinox season is also suitable for morning exercise and walking.