Date Selection: Define Window First, Separate Ritual from Decision

择日事项 is the practical question of when to hold an event: a wedding, a groundbreaking, a funeral, a first journey, the collection of a new vehicle, or any other act for which a date must be chosen. In Chinese practice, the subject sits inside a larger body of calendrical and divinatory convention, but it is not identical with individual fate calculation. The entry below sets out how the material treats the distinction, the main categories of affairs, the vocabulary differences for weddings, construction and funerals, the handling of dates when no suitable day appears, and the position of this site on choosing dates.

择日与算命是两套系统

The practical order in the source material is: first determine the feasible period, then choose among feasible days, and finally separate the ceremonial moment from the underlying decision. Choosing a day first and then bending the surrounding reality to fit it is described as the most common disorder in this matter.

The two systems are distinct in method and in object. This site’s engine can calculate the 干支 of any date, but it does not publish date-selection advice. The reason given is that two characters do not have enough resolving power to correspond to a specific person and a specific matter. In other words, knowing the sexagenary day is not enough to make a recommendation about whether that day suits a particular individual and a particular event.

That distinction runs through the whole treatment. A date is a general calendrical unit; a person is a full set of birth data. The traditional almanac can filter at the level of broad categories, but it cannot reach the level of a concrete person unless the relevant birth information is supplied, and even then the old sources do not always agree.

常见事项的分类

The source facts divide common affairs into categories according to how the traditional vocabulary works. Marriage, ground-breaking and funeral matters are treated separately because their terms differ in scope. Vehicle collection is also discussed, but it has no direct old entry.

For marriage, the old conditions are layered. First one checks whether the woman’s year stem, or more exactly the year branch of her birth year, clashes with the chosen day. Then one avoids fixed inauspicious days such as 三娘煞，四离四绝 and 杨公忌. Only after that does one look at 建除 and other 神煞. The source notes that the old texts themselves disagree on whose eight characters should be the standard in marriage date selection.

For ground-breaking and similar construction matters, the core is direction rather than date. The old rule is to avoid starting work in the direction of the year’s 太岁. The date is a secondary condition, not the primary one. This means that a day that looks acceptable in isolation may still be unusable because of where the work faces or where the ground is opened.

婚嫁、动土与丧葬的用词差别

The traditional almanac’s list of suitable and unsuitable items has no entry for 出殡. The fixed entries relating to death and burial are 入殓，移柩，成服，除服，启攒 and 安葬. 出殡 is understood as a process rather than a separately chosen date. The material therefore cautions against looking for a direct match for the funeral procession itself; the dated acts are the enclosing, the moving of the coffin, the putting on and removal of mourning dress, the opening of a grave, and the burial.

The word list likewise has no entry for 提车, or collecting a car. Among the old items that can be borrowed are 造车器，出行 and 纳财. Each of these has its own original reference: 造车器 concerns the making of vehicle implements, 出行 concerns going out or undertaking a journey, and 纳财 concerns the receipt of wealth. The correspondence between any of these and the modern act of taking delivery of a vehicle is chosen by the person consulting the table, and different schools or practitioners do not agree on a single mapping.

This shows a general property of the traditional vocabulary. It was formed for a world of sedan chairs, coffins, mourning garments, ox carts and construction by hand. Modern acts often have to be assigned to an older category by analogy, and the analogy is not fixed.

找不到合适日子的处理

When all the available dates are marked as inauspicious, the usual explanation is not that none of those days can be used. Rather, several parallel systems have each contributed their own taboos, and those taboos have been stacked and then rejected item by item. There is no higher adjudication mechanism among the systems. No single authority decides which system wins when one says a day is acceptable and another says it is not.

This has a practical consequence. If a person simply looks at the final mark and sees that every candidate day is marked 忌, that result may be an artifact of superposition. The source presents the situation as one of layered prohibitions rather than an absolute judgment that the entire period is unusable. The absence of a higher mechanism means that a practitioner or household must decide which layers are relevant to the matter at hand, and which can be set aside.

This is also why the feasible period comes first. If one first fixes the range of days on which the event can actually be held, then one can compare those days against the relevant layers. If one starts from a single preferred day and then tries to satisfy every system, the source says the most common disorder follows: the choice is made first and the reality is rearranged around it.

本站在择日上的位置

This site’s position is deliberately limited. It can compute the 干支 of any date requested, but it does not issue date-selection recommendations. The explanation is again that the two characters of a day are not sufficient to correspond to a specific person and event. The engine gives the calendrical data; it does not interpret that data as a recommendation to marry, bury, break ground, travel or collect a vehicle on that day.

The only column in a traditional almanac that directly links to the person concerned is the 冲煞 column. Even that link is narrow: it falls only on the year branch, the 地支 corresponding to the birth year. It does not involve the full four pillars. Knowing only a person’s animal sign therefore permits only a rough almanac-level screening. To see how a given day bears on a specific person, one needs the complete year, month, day and hour of birth. If the hour is uncertain, the source says one should provide a range of candidate hours rather than pick one on the spot and fill it in.

The same restraint applies to the traditional word lists. This site can show the relevant entries, but it does not decide which borrowed entry should stand for a modern act such as collecting a car. The mapping is left to the user, and the source notes that schools differ. The site’s task is to make the calendrical facts available, not to resolve disputes among systems or to supply a final verdict.

In sum, the entry treats 择日事项 as a practical subject with a specific order of work: set the feasible interval, choose within it, and keep the ritual timing separate from the underlying decision. It distinguishes date selection from fate calculation, warns against reading a single day’s two characters as a personal recommendation, and points out that the old vocabulary does not contain a direct term for every modern event. Where the old sources disagree, the disagreement is reported rather than settled.