Why are calendars different?

The editor of the solar calendar must know the twelve satellites, the yellow star, the good and bad luck of the underworld, etc. To know what is appropriate and what is taboo. Secondly, there is still a lot of knowledge to be judged on auspicious days. There are many reasons for version differences, such as typographical errors in piracy or local customs restrictions. As long as you think the engagement is good, you don't have to look for information everywhere. Otherwise, you have to find a professional to decide whether it is good or bad according to your birthday.