What does it mean to build a day on the auspicious day of the zodiac in the perpetual calendar?

After twelve days of construction, removal, filling, leveling, decision, holding, breaking, danger, success, closing, opening and closing, we will see its value again and again to determine good luck or bad luck. Overlap two duty days every month, and the method shall be subject to the construction of the month, which corresponds to the meaning of the bucket. For example, if the shade is built in the first month, it will be built on a cloudy day, and it will be built on the twelfth day.

The calendar of year, month, day and hour in heavenly stems and earthly branches is called the trunk calendar, which is a unique solar calendar in China. This kind of calendar, that is, the imperial calendar still in use today, is mostly recorded in the almanac, that is, the imperial calendar in the past. In the old "imperial calendar", in addition to the date of the official branch, another word 12 was added to the date and became a formula. Namely: Jianping and Hei (the underworld), the danger must be removed (the ecliptic), and the opening and closing can be used (the ecliptic), but not (the underworld). In this way, every day is artificially divided into "good day" and "bad day". An auspicious day is the right day for everything. Farmers' calendars or yellow calendars and children can choose auspicious days, such as marriage, marriage, engagement, dating, opening, opening and moving. The so-called yellow mafia is a natural phenomenon in celestial bodies. The predecessors summarized the law of this phenomenon's influence on human beings, and formulated "Yellow Mafia Day" around the operation and responsibilities of the 28 stars. Therefore, it provides a certain reference and choice for human survival and development, seeking good fortune and avoiding evil. Jianri is one of the auspicious or ominous days of 12. ?