How traditional date selection works
Traditional date selection, zeri (择日), relates a proposed undertaking to the classifications of a calendar or almanac. It can involve reading a printed entry, following a household’s established practice or consulting a specialist. The undertaking matters from the outset: marriage, installing a bed and beginning construction are distinct activities.
The undertaking
An event described broadly as a wedding or a house move may contain several separately named undertakings, each with its own almanac entry. Naming the action establishes which entry is relevant.
| Part of an event | Almanac term | Scope |
|---|---|---|
| Formal proposal and proposal gifts | Nacai 纳采 | A preliminary marriage rite |
| Marriage | Jiaqu 嫁娶 | The marriage undertaking |
| Installing or arranging a bed | Anchuang 安床 | A household preparation that may form part of wedding arrangements |
| Entering a new home | Ruzhai 入宅 | Entry into a dwelling |
| Relocating a household | Yixi 移徙 | Moving the household |
The exact term matters because an English word such as “moving” can cover both relocating belongings and a formal house-entry rite. Those actions may take place together or on separate occasions. The people involved need to identify which one they intend to date.
The distinction between a wedding and its preparations is also practical. In some Taiwanese wedding customs, installing the bridal bed is assigned its own day and hour before the marriage. Other households do not observe that separate rite. An almanac’s vocabulary accommodates the distinction without requiring every family to follow the same sequence.
Construction presents a similar question of stages. Beginning earthwork, raising pillars and placing the main beam are different undertakings. A date chosen for the start of work does not automatically cover a later stage with its own entry.
Traditions and priorities
Activity rules and general classifications
Yi and Ji identify suitable activities and activities to avoid. Other fields supply classifications that a date-selection tradition may also consider: the twelve day officers, the presiding deity and its path, clashes, directions and hour entries.
The relevant rules are those connected with the undertaking. A general day grade may be one part of the decision, while an activity-specific restriction can take precedence. Daily entries and hourly entries also have to be kept at their intended scope.
Selection consequently involves priorities as well as categories. A tradition may give particular prohibitions precedence, allow specified favourable conditions to offset others, or apply different rules to different undertakings. The order of those decisions belongs to that tradition. Choosing whichever isolated label appears most favourable can produce a mixture that no individual method actually uses.
Books, specialists and software
A printed almanac offers an edition’s selection of rules and entries. A consultation can consider the circumstances of a proposed event and the household’s customary requirements. Software returns the classifications implemented in its calculations and tables. Even where they share vocabulary, these three forms of guidance need not cover the same questions.
A printed page also has limited space. A compiler may select major undertakings, abbreviate activity names or summarize several conditions in a general grade. An omitted activity is therefore not necessarily a positive or negative recommendation. The book’s explanations determine how its omissions and summaries are meant to be read.
For an event involving several households, the choice of almanac or practitioner is best settled before a date is treated as agreed. One family may follow a particular edition, another a customary ritual sequence, and another may have no date-selection requirements. Clarifying those expectations avoids making an apparently precise calculation answer a question the participants have not yet agreed on.
A date shortlist
A shortlist brings together two kinds of condition: dates that are workable for the event, and traditional requirements the participants have chosen to observe. Availability, preparation and venue arrangements define the practical choices. The relevant almanac entries can then be compared within those choices.
| Shortlist question | Useful record |
|---|---|
| What action is being scheduled? | The event and its exact activity term |
| Which tradition is being followed? | The chosen almanac edition or practitioner’s guidance |
| What does the entry say? | The activity under Yi or Ji, including any restrictive phrase or absence of an entry |
| Is an hour part of the practice? | The action to occur within that interval and the clock time being used |
| Are there conflicting requirements? | The specific conditions and the agreed order of priority |
| Is the event workable? | Availability, travel, preparation and venue constraints |
When an hour is selected, the action associated with it needs to be clear. Beginning a ceremony, entering a home and completing a move are not the same moment. The hour’s classification should be read at that scope, rather than assumed to describe the entire day.
If two chosen authorities give opposite activity entries, their disagreement cannot be resolved by averaging unrelated labels into a score. The participants may give one tradition precedence or choose another workable date. The resulting choice brings the agreed customary requirements together with the event’s practical needs.