to about profit and money making. Choosing a good date and time for opening ceremony is important. Choosing a wrong date and time for opening ceremony will have dire effect to the business.
Let me quote an example, choosing the hour which indicates空 will result in poor customer flow. As such, we can use Qi Men Dun Jia to choose a prosperous date and time for opening ceremony; factoring in Feng Shui of business location, owner's bazi and good date selection. This creates a (天时, 地利, 人和) Heaven, Earth & Man effect.