Why is it not obvious how short the day is after the summer solstice?

How short is the day from summer to the future?

Let's talk about the conclusion first, usually it is shortened by more than 2 minutes every day. On the solstice in summer, the sun shines almost directly on the Tropic of Cancer. On that day, the northern hemisphere had the longest day and the shortest night. From then on, the direct point of the sun will move southward day by day. However, because the earth does not reach the apohelion until the twelfth or thirteenth day after the summer, even after this solar term, the short speed of a day is too slow for the computer to notice, but after the apohelion, the speed of the earth's rotation gradually accelerates, and people feel that the day is obviously shortened. Therefore, it will take some time to clearly perceive this change.

What are the customs?

1. Summer Festival: China ancient book "Li Zhou Guan Chun" contains: The arrival of summer causes local events. The solstice of summer is just after the wheat harvest. Farmers not only thank God for the bumper harvest, but also pray for the autumn harvest. No matter the government or the people, there are very grand sacrificial activities.

2. Eat noodles: As the saying goes, eating noodles on the solstice in summer will shorten the day. No matter in the north or the south, there is a habit of eating pasta. There are many kinds of noodles in the south, such as Yangchun noodles, dried soup noodles, shredded pork noodles, three fresh noodles, sesame oil noodles and cold noodles, while noodles with gravy and noodles with dregs in the north.

3. Weighing: In some areas, children will be weighed after eating wonton. Compared with last year, see if the weight has increased.

What are the taboos of this solar term?

In the past, people had high demands on their daily life. They can't get up late on this day, and they shouldn't go out to shave their heads, but there is no such requirement now.

(2) By querying the old almanac, it can be known that it is not appropriate to carry out relocation, relocation and other things related to the commencement of construction on that day. If it is necessary to open a shop, you should also ask a professional master to calculate. This summer is not suitable.

Some newcomers like to hold weddings in summer, but this solar term is taboo. If you plan to get married or get a license, you'd better choose another auspicious day.