What are the characteristics of the 24 solar terms Spring Equinox? On which day of the Gregorian calendar does the Spring Equinox fall?

Spring breeze is one of the 24 solar terms, the fourth solar term in summer, and a relatively important solar term. The arrival of the spring equinox means the arrival of spring, and rainfall begins to increase. Generally, spring breeze occurs in March of the Gregorian calendar every year. When exactly is it? Let's continue reading and learning to find the answer.

Contents of this article

1. Characteristics of the 24 solar terms: Spring Equinox

2. On which day of the Gregorian calendar does the Spring Equinox fall?

3. Are the spring and autumn equinoxes fixed?

Characteristics of the 24 solar terms: Spring Equinox

On the day of the spring equinox, the sun shines almost directly on the earth's equator, and the length of day and night is almost equal everywhere in the world. After the spring equinox, the sun's direct point begins to enter the northern hemisphere, and the days begin to get longer and the nights shorter everywhere in the northern hemisphere.

During the Spring Equinox, the East Asian trough weakens significantly, the westerly trough and ridge activity increases significantly, low pressure activity and cyclone development often occur from Mongolia to the Northeast, the movement of low pressure leads the cold air to move southward, and the northern region is prone to strong winds and blowing sand. When the long-wave trough moves eastward, affected by the convergence of cold and warm air masses, continuous rain and late spring cold weather will occur.

During the Spring Equinox, rainfall in various places will increase significantly and the temperature will slowly rise. Except for the high-altitude and cold areas and areas north of 45° north latitude, the average daily temperature in all parts of my country will steadily rise to above 0℃.

On which day of the Gregorian calendar is the spring equinox

Between March 20th and March 22nd every year.

The fourth solar term in the 24 solar terms, it falls between March 20 and 22 of the Gregorian calendar every year. When the sun reaches 0° of the ecliptic longitude, the spring equinox is when the sun's direct point is on the equator. After that, the sun's direct point continues to move north, so the spring equinox is also called "rising equinox". In ancient times, it was also called "midday", "day and night division", and "mid-spring month".

Are the spring and autumn equinoxes fixed?

Not fixed.

The solar terms indicate the position of the Earth in its orbit. Each 15° is a solar term. There are 24 solar terms in a tropical year, and a tropical year is 365.2422 days, which are not integers. Therefore, the vernal equinox and autumnal equinox are not fixed days. The vernal equinox is usually on March 20 or 21 in the Gregorian calendar, and the autumnal equinox is usually on September 22-24.