命卦 · Eight Mansions

Ming Gua Calculator

Personal trigram, group and the eight directions, calculated on the true Li Chun boundary rather than 1 January or a fixed 4 February.

:

Sex is used because the classical Ming Gua formula runs in opposite directions for men and women. Time of birth only matters when the date falls within a day of Li Chun, the calculator will say so when it does.

Method

The solar year

The Ming Gua is fixed by the solar year, which begins at Li Chun and not at Lunar New Year or 1 January. Li Chun is the moment the sun reaches 315° of ecliptic longitude; it falls on 3, 4 or 5 February depending on the year. This calculator carries computed Li Chun instants for 1900 to 2070 and converts each one into the birth city’s own time zone, applying that zone’s historical and daylight-saving rules, so a birth in the first days of February is assigned correctly.

The formula

Male Gua runs on the descending nine-year cycle, female on the ascending one, both counted from the solar year. A result of 5 has no trigram of its own and is transferred, to 2 Kun for men and 8 Gen for women, which is the common convention.

Scope

Eight Mansions is one system among several. It sets personal directions; it does not describe the building. A door, a desk or a bed should be checked against the flying stars of the property and the annual afflictions before it is moved.

Feng Shui Today, Classical Feng Shui Professional Platform