Specific time of spring equinox in 2018
4hw.com.cn: the spring equinox is one of the traditional 24 solar terms. At the spring equinox, the sun begins to shift to the northern hemisphere, and the temperature in the northern hemisphere will gradually rise. The day begins to be longer than the night. Do you know the exact time of the spring equinox in 2018? What are the customs of the spring equinox? Let's take a look at it together with Sihai Xiaobian.
Time of the spring equinox in 2018: 00:15:24, March 21, 2018, the fifth day of February (University) in the lunar calendar.
What does the equinox mean
Equinox means equinox. Equinox means Equinox Day and night.
At the spring equinox, we fight with our fingers. The Yellow meridian of the sun is 0-DEG;. On the equinox, the sun is above the equator. This is the middle equinox of 90 days in spring. On this day, the days and nights in the northern and southern hemispheres are equal, so it is called the vernal equinox. After the equinox, the direct position of the sun moves northward, and the days and nights in the northern hemisphere are long and short. Therefore, the equinox is also the beginning of spring in the northern hemisphere. In spring equinox, the overwintering crops in most areas of China enter the spring growth stage.
Introduction to the spring equinox
In the 24 solar terms, spring, summer, autumn and winter represent the beginning of the four seasons. The spring equinox, summer solstice, autumn equinox and winter solstice are in the middle of each season. So the equinox is the middle of spring. At this time, most of China's overwintering crops entered the spring growth stage, and the temperature continued to rise. It is good for planting rice, corn and other crops, and also suitable for afforestation.
However, before and after the spring equinox, there are often several strong cold air intrusions in the basin, the temperature fluctuates greatly, and sometimes small cold air comes one after another, forming a cold rain lasting for several days, which is very harmful to the growth of crops. At this time, it's best to make full use of weather forecast and timely sow with cold tail and warm head.