XXVI. A Layered Framework for Traditional Date Selection

1. Date Selection Begins by Clarifying Exactly What Is Being Chosen

Opening for business, a soft opening, signing a contract, installing the door, installing the stove, starting renovation, breaking ground, hanging the sign, moving the register — different actions carry different suitabilities and taboos. A date marked "suitable for opening a business" does not automatically mean it also suits breaking ground or installing the stove. Only once the name of the event, the location, the sitting mountain, the participating principals, and the available window of time have all been written down can screening actually begin.

An opening usually takes the formal unlocking of the door to welcome customers, and the first public transaction, as its core moment. Where a soft opening already involves substantial transactions, which day counts as the true opening should be agreed upon in advance. If a separate celebration is held purely for publicity, the celebration's date can be chosen independently — there is no need to pretend that the house's qi does not begin until the ribbon is cut.

2. The Monthly Command and the Flourishing and Decline of the Five Phases

First fix the monthly command (yueling) by the solar term, and observe whether the Five Phases of the chosen day's Four Pillars find their season or run to an extreme. The framework of Wood flourishing in spring, Fire in summer, Metal in autumn, and Water in winter operates here. Date selection is not about collecting a complete set of all Five Phases — it is about letting the generation and control within the chart used for the opening flow in good order, without a serious clash against the sitting mountain and the shop's facing.

If the shop's sitting mountain belongs to a given earthly branch, one would generally first exclude any date whose day branch directly clashes with that sitting mountain; if the principal's year branch is strongly clashed, that too should be avoided or given lower priority. Where several partners are involved, it is simply impossible for every one of them to be entirely free of any clash — priority should go to the shop itself and its principal proprietor, while other participants can take on secondary roles in the ceremony during a time that does not clash with them.

3. The Tongsheng Almanac's Suitabilities and Taboos

The Tongsheng or "yellow" almanac lists suitable and unsuitable activities for each day, serving as a first-round screening tool. When checking entries such as "opening a business, trading, signing a contract, receiving wealth, setting up a bed, renovation, breaking ground, installing a door, or building a stove," these must be matched against the actual action planned. Different editions of the almanac may disagree, so one should fix on a single calendrical system, record which convention is being followed, and not simply pick whichever page happens to favor the desired date.

Even where the almanac marks a day "suitable," it still needs to be checked against clashes and shas, the monthly command, and the shop's facing. Where it marks a day "unsuitable," that day is generally not chosen for a major event of that kind. Date selection is not a matter of looking for a single word "suitable," nor a contest for the greatest number of auspicious spirits. If the almanac conflicts with a more specialized plotted chart, the reasoning behind the choice made should be explained.

4. The Twelve Establishment-and-Removal Officers

The Twelve Establishment-and-Removal Officers (jianchu shi'er shen) rotate on duty according to the monthly establishment (yuejian) and the sequence of day branches, in the order Establish, Remove, Full, Level, Fix, Hold, Break, Danger, Complete, Gather, Open, and Close. In common usage, an Open day suits opening for business; a Complete day suits achievement; a Fix day suits stability; a Full day carries a sense of abundance; a Break day is generally not used for an opening; a Close day emphasizes closing and storing; a Danger day calls for caution. The specific fortune or misfortune still depends on the matter at hand and the combination with other shensha.

An Open day should not be treated as automatically the best in every case. If an Open day clashes with the shop's sitting mountain and also meets a serious sha, it should still be set aside; a Gather day suits taking things in, but is not necessarily suited to a high-profile grand opening; a Remove day suits clearing away the old, and can also be used for cleaning and repair. The Twelve Officers supply a rhythm for the nature of an action — they do not replace a complete chart for the day.

5. The Yellow Path and the Black Path

Tradition sorts the days on duty — Green Dragon, Bright Hall, Heavenly Punishment, Vermilion Bird, Golden Chest, Heavenly Virtue, White Tiger, Jade Hall, Heavenly Prison, Dark Warrior, Controller of Fate, and Hooked Array — into the Yellow Path (huangdao) and the Black Path (heidao). A Yellow Path day is generally preferred, and a Black Path day generally avoided, but this must still be combined with the Establishment-and-Removal officer, any clash or sha, and the specific matter at hand. A so-called Yellow Path day is not auspicious at every hour throughout the day either — each hour has its own officer on duty.

If one Yellow Path day clashes with the sitting mountain, while another, ordinary day does not clash and has the Five Phases flowing well, the latter may in fact suit this particular shop better. The object of date selection is this shop and this specific matter — not a contest to crown the single most auspicious day for all of society.

6. Heavenly Virtue, Monthly Virtue, and Other Common Auspicious Spirits

Heavenly Virtue (tiande), Monthly Virtue (yuede), and their combining days are commonly regarded as auspicious spirits able to dissolve calamity and support good fortune, and can be given priority when selecting a date for an opening or for renovation. There are also other auspicious-spirit systems for different purposes, such as Heavenly Pardon (tianshe), Mother Granary (mucang), and Heavenly Wish (tianyuan). The method for locating these auspicious spirits depends on the monthly stem-branch or the season, and a reliable reference table must be used — dates should never be invented simply from the name of a spirit.

An auspicious spirit carries a sense of easing and softening, not a license to disregard a serious clash or control relation. A date that carries Heavenly Virtue but also directly clashes with the sitting mountain should generally still be passed over in favor of another. A report can list two or three key auspicious spirits — there is no need to pile up dozens of shensha at once, which only invites arbitrary picking and choosing when they contradict each other.

7. Common Inauspicious Shas and Levels of Avoidance

Suipo (the year-breaking day), yuepo (the month-breaking day), ripo (the day-breaking day), the Four Departures and Four Extremities, and various folk taboo days are weighted differently across different date-selection traditions; there is also the combination of space and time in the Three Killings, Five Yellow, and ground-breaking in a taboo direction. This article does not offer an intimidating list of "a hundred taboos," and instead sorts them by level: a direct clash with the shop's sitting mountain, and suipo or yuepo combined with major ground-breaking, are high-priority items to avoid; ordinary shensha serve as a secondary screen; and minor shas whose folk versions vary widely are recorded but not allowed to dominate the decision.

If the conditions for avoiding shas pile up until no date at all is left, one should return to the scale of the event. Formally tearing down a wall and breaking ground calls for strict standards; simply changing a price tag needs no date selection at the same level. Elevating every routine action to the level of a major event would bring the business to a standstill, and would also depart from the classifying spirit of traditional date selection itself.

8. The Relation Between the Day Chart's Four Pillars and the Sitting Mountain

Once candidate dates are selected, plot the Four Pillars of year, month, day, and hour, and examine the generation and control among the heavenly stems and earthly branches, their harmonies and clashes, their flourishing and decline, and whether they support the sitting mountain. A day chart should have both a source and a flow, avoiding any one phase growing too strong with nothing to restrain it, or an upper and lower clash within the pillars. Used for an opening, one generally hopes for wealth qi to circulate freely and the door not to take a clash; used for installing the stove, one pays particular attention to Fire and Earth and to the stove's direction.

Different schools also have their own complete date-selection methods, such as Supporting the Mountain and Assisting the Master (fushan xiangzhu), Doushou, and Qimen — each with its own full set of rules. One should not pick a single auspicious spirit from each different school and stitch them together into a supposed "supreme day." This article uses the Tongsheng almanac, the Twelve Establishment-and-Removal Officers, the Yellow and Black Paths, the virtue spirits, clashes and shas, and the Five Phases day chart as its basic framework; if a specialized method is used instead, it should be plotted as an independent chart and clearly explained.

9. Choosing the Hour

Once the day is settled, the hour is chosen next. The hour of opening should fall within a range staff, customers, and the property manager can actually accommodate. Tradition avoids a clash with the sitting mountain and the principal proprietor, and favors an hour whose officer is more favorable and which generates or harmonizes with the day chart. A ceremony can open the door at an auspicious hour, with regular business continuing afterward — there is no need to make everyone rush and risk themselves for a late-night auspicious hour.

Solar time and the statutory time zone may differ in a fine-grained chart, and whether to correct for this must be applied consistently throughout. For ordinary commercial folk-custom date selection, the local statutory time can be used and noted as such; if a specialized system requiring true solar time is adopted, it should be corrected for longitude accordingly. One should not switch between Beijing time and true solar time depending on which produces the prettier-looking result.

10. A Three-Tier Output for the Date-Selection Result

The output is best given as a first choice, a backup choice, and dates to avoid. The first choice satisfies the main conditions; the backup may lack one minor auspicious spirit but carries no hard clash; the dates to avoid are listed with a clear reason each. This way, if weather, approvals, or logistics change, there is already an alternative on hand, without having to improvise a change at the last minute.

Each date should be recorded with the Gregorian date, the lunar date or solar-term month, the stem-branch, the day of the week, the available time window, the corresponding event, the main basis used, any taboo, and practical notes. A date-selection document should let a second person independently check the reasoning — not simply state "this day is highly auspicious."