Building a house depends on whether feng shui is based on the solar calendar or the lunar calendar.

Choosing good luck refers to a method of choosing good days and auspicious times based on the calendar of cadres and branches, according to the calculation of good luck and bad luck of year, month, day and hour, and by comprehensive reference, to determine the way to avoid evil.

Gregorian calendar: The time when the sun runs along the yellow meridian from zero 15 degrees is called "a solar term". It runs 360 degrees every year, and * * * experiences 24 solar terms, twice a month. Among them, the first solar term of each month is "solar term", that is, beginning of spring, Jingzhe, Qingming, Changxia, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Hanlu, beginning of winter, Heavy Snow, Xiaohan, etc. 12 solar terms; The second solar term of each month is "Zhongqi", that is, there are 12 solar terms such as rain, vernal equinox, Grain Rain, Xiaoman, summer solstice, great heat, intense heat, autumnal equinox, first frost, light snow, winter solstice and great cold. "Solar term" and "neutral qi" appear alternately, each lasting 15 days. Now people have called "solar terms" and "neutral gas" solar terms.

Lunar calendar: the lunar calendar takes the first month of the lunar calendar as the unit, with 30 days in the first month and 29 days in February. The first lunar month and the second lunar month complement each other, making the average length of calendar months close to the first lunar month.