Therefore, when it comes to projects, shops, weddings and funerals, and going out for a long trip, it is popular to choose a good day I just hope that everyone will have an auspicious result. The custom of choosing auspicious dates is a traditional culture with a long history in China, which has extensive cultural connotations and deserves our attention and study. Choosing an auspicious day is basically to find and determine the right time and space for all kinds of activities in the world. It is entirely possible to grasp the appropriate opportunity caused by the harmonious relationship between weather, geography and people, so as to achieve the result of seeking good luck and avoiding evil. It permeates people's hearts, and then transforms into people's subconscious, invisibly enriching people's lives powerfully and dominantly, and the custom of choosing good luck is passed down from generation to generation. Through the continuous revival and prevalence of human society. In today's social life, the number 8 is a homonym, which means developed and auspicious. Many people choose license plates and phone numbers like this number. Let's ignore its actual value; But the original intention of users is auspicious and developed. Therefore, when something important happens, we are used to choosing an auspicious day.