And each school is different, and the inheritance is different. Take feng shui as an example. There is a difference between situation and regulating qi. The eight-character school includes Yang Gong and so on.
Moreover, even on a bad day, it is not impossible. If you have to get married on White Tiger Day, you need a unicorn logo. And if the family must get married in the second month, it is feasible to find the year, day, month, or a combination of years, days and months.