The old imperial calendars you mentioned are good and bad, some are valuable for reference, some are worthless and even harmful. Those instructions are just ordinary folk customs, not real feng shui, because they are not compiled by real feng shui masters.
If the almanac is right, the science of choosing auspicious days will not exist, and it has long since disappeared, and its existence proves its existence.
How big is the role of auspicious choice?
It is difficult to locate accurately.
For example, when cooking, when the oil burns to what temperature, what material is the most suitable?
This is different for different dishes.
If cooked early, the aroma of the fried dishes is not strong enough, or the taste is not ideal enough. If it is late, some dishes may be fried, a little burnt, or have other problems. Therefore, the most suitable ordering time can ensure the best dishes.
For a professionally trained chef, as long as it is a familiar dish, it is not a problem. However, this is only a part of the whole cooking process. Although it is also important, it doesn't mean that it can decide everything. Only by ensuring that every link is properly mastered is a high-level chef.
If you are a novice without special training, as long as the basic cooking procedures are correct, then fried food can be eaten, but the taste is worse.
For feng shui masters, the same is true. Whether it is a house (house) or a house (grave), every link will play a role in the specific operation. Only by ensuring that every link is perfect can we achieve the best results.
For some Feng Shui masters who are not real masters, as long as they are truly handed down (such as recipes) rather than hearsay, as long as they follow the procedures, even if every link is not perfect, it is effective, but the effect will be worse.
But then again, even if you meet the best feng shui master, if your fate is not good, you have not accumulated enough virtue, and you and the feng shui master have no chance.
If your life is beautiful enough, if you accumulate enough virtues, then you may be the best choice at any time, and you don't have to look up any lucky books at all. This is destiny.
I hope my explanation will help you!