Today is the Spring Equinox, the swallows are returning and the flowers are blooming. What does the Spring Equinox mean?

Spring Equinox (one of the 24 solar terms) Editor Discussion 52 Spring Equinox, one of the 24 solar terms, is the fourth solar term in spring. When the Dipper points to Ren, the Sun's ecliptic longitude reaches 0°, and the solar term falls on March 20 or 21 of the Gregorian calendar every year. At the vernal equinox, the sun's direct point is on the equator. After that, the sun's direct point continues to move northward, so the vernal equinox is also called the "rising equinox." In ancient times, it was also called "the middle of the day", "the division of day and night", and "the moon of mid-spring".

The Spring Equinox is a relatively important solar term, which has important significance in astronomy: the day and night are equal in the northern and southern hemispheres. There are also obvious characteristics in terms of climate. From this day on, the sun's direct position continues to move from the equator to the northern hemisphere, and the days gradually become longer and the nights gradually shorten in all parts of the northern hemisphere, while the nights gradually become longer and the days gradually shorten in all parts of the southern hemisphere. During the Spring Equinox, all parts of my country enter a bright spring, except for the Qinghai-Tibet Plateau, Northeast China, Northwest China and northern North China. At this time of year, the climate is mild, with abundant rainfall and bright sunshine, and overwintering crops in most parts of my country enter the spring growth stage.

The significance of the Spring Equinox is, firstly, that the day and night are equally divided, 12 hours each; secondly, the Spring Equinox is in the three months of spring (from the Beginning of Spring to the Beginning of Summer), dividing the spring season equally. The traditional method of dividing my country's four seasons is to use the "Four Beginnings" of the twenty-four solar terms as the starting points of the four seasons, and the equinoxes and solstices as the midpoints. For example, spring starts at the Beginning of Spring (the Big Dipper points to the northeast, which is the Gen position in the Eight Trigrams), the Vernal Equinox (the Big Dipper points to the east) is the midpoint, and the Beginning of Summer (the Big Dipper points to the southeast) is the end point. The four seasons in the West are divided based on the "equinoxes and solstices" as the starting points of the four seasons. For example, spring starts at the vernal equinox and ends at the summer solstice. Western countries are located at higher latitudes and farther away from the intersection of the ecliptic and the equinoxes. Therefore, using the "equinoxes and solstices" as the starting points of the four seasons can more realistically reflect the local climate than the "four beginnings". The Western division of the four seasons based on the "equinoxes and solstices" is one and a half months later than the traditional Chinese division of the four seasons based on the "four beginnings".

On the fourth day of the second month of spring,

Spring is in the middle.

The moon wanders in the green fields,

Sunny with intermittent clouds.

today

We usher in the twenty-four solar terms

The fourth solar term: Spring Equinox

Spring Equinox

Named after astronomical and meteorological features

The Spring Equinox

The sun is directly above the equator

Day and night are equally divided

12 hours each

Second, the spring equinox is

Between the Beginning of Spring and the Beginning of Summer

Divides the spring

The Spring Equinox has three phases

The first black bird arrives

The second sign of thunder is sounded

The electricity starts from the third period