Does anyone know the "birthday" of Feng Shui's choosing a day?

I can tell you that "live festival" refers to the four days of the solar calendar every month. These four days are considered as "active" days in Feng Shui, which are suitable for some important activities, such as starting work, getting married and moving. There is also a theory of choosing a day among the people, such as "victory is tiring", which is also a choice of day to do things. But it is better to find professional experts for these theories.