What does good or ill luck mean in the perpetual calendar?

The good or bad influence on people or things at a certain moment. The good or ill luck of calendar time is a concept in China traditional culture, which refers to the good or ill luck influence of a certain time on people or things. In the traditional culture of China, every hour has a corresponding sixty jiazi, which is divided into two parts: Yang Jiazi and Yin Jiazi, in which Yang Jiazi is auspicious and Yin Jiazi is evil. Therefore, the good or ill luck of calendar time refers to whether the corresponding Jiazi at a certain time is good or bad.