What does string day mean?

"Harmony with the Sun" is an ancient calendar recording method in China. Its basic meaning is based on the time when the moon reaches the full moon and the half moon, which are called neutral qi and solar terms respectively. In the lunar calendar, a year is divided into 24 solar terms, and the changes of time and season are demonstrated according to the relative movement angle and position of the sun and the earth. Because the lunar calendar is a typical calendar, it is usually used to describe the half moon and the full moon of the lunar calendar. In modern calendars, the chord day is usually used to represent the phase of the moon.

String sun not only played an important role in timing in ancient China, but also was widely used in Japan and other East Asian countries. In many traditional cultures, string days are used to predict the weather and sowing time, and can also represent health care, disease and human clock adjustment. Many rural communities still use string days to monitor the growth and harvest time of crops. It is of great significance to human life, especially to farmers' production, and its timing method has certain scientific accuracy.

In addition, in China traditional literature, the sun is often used as a symbol. The word string sometimes covers symbolic meanings such as books, doors, clocks, machines and curtains, while the sun represents light, light, wisdom, heaven and righteousness. When these symbolic attributes are combined, the concept of string sun means brightness, opportunity and auspiciousness. In poetry and literary works, strings are used to describe good times and atmosphere and express wishes for happiness.