玄空大卦择日
Xuan Kong Date Selection

玄空大卦（Xuan Kong Da Gua）是中国玄学中一套高级的时空分析体系，源于《周易》六十四卦与洛书九宫的结合。“玄”指时间的玄妙变化，“空”指空间的无穷维度，“大卦”则指六十四卦的完整系统。与常见的八字命理不同，玄空大卦侧重于分析某一特定时间点与空间方位之间的能量关系，从而判断该时间是否适合进行某项活动。 玄空大卦的理论基础主要来自清代蒋大鸿的《地理辨正》以及后来沈竹礽等学者的发展。蒋大鸿被认为是玄空风水学派的集大成者，他将六十四卦与二十四山向系统地结合起来，建立了一套完整的时空能量评估方法。在择日应用中，这套方法能够精确地分析年、月、日、时四个时间层次与坐向、方位之间的卦气配合关系。 与简单的黄历择日不同，玄空大卦择日法考虑的因素更为全面和精细。它不仅关注日子本身的吉凶属性，还将用事者的命理信息、活动的具体方位、以及当下的大运流年等因素综合考量，力求找到天时、地利、人和三者兼备的最佳时机。

Xuan Kong Da Gua is an advanced time-space analysis system in Chinese metaphysics, born from the union of the 64 Hexagrams of the Yi Jing (Book of Changes) and the Lo Shu (Nine Palaces) magic square. "Xuan" refers to the mysterious flow of time, "Kong" to the infinite dimensions of space, and "Da Gua" to the complete system of 64 Hexagrams. Unlike Bazi destiny analysis, which focuses on a person's birth chart, Xuan Kong Da Gua specializes in analyzing the energy relationship between a specific point in time and a spatial direction to determine whether that moment is suitable for a particular activity. The theoretical foundations of Xuan Kong Da Gua derive primarily from Jiang Dahong's "Di Li Bian Zheng" (Geographic Discernment) of the Qing dynasty and the subsequent developments by scholars such as Shen Zhuren. Jiang Dahong is regarded as the great synthesizer of the Xuan Kong Feng Shui school, systematically combining the 64 Hexagrams with the 24 Mountains directional system to establish a comprehensive method for evaluating time-space energy. In date selection applications, this method precisely analyzes the hexagram qi compatibility across four temporal layers — year, month, day, and hour — in relation to sitting directions and orientations. Unlike simple almanac-based date selection, the Xuan Kong Da Gua method considers factors far more comprehensively. It examines not only the inherent auspicious or inauspicious nature of a day, but also integrates the user's personal destiny chart, the specific direction of the activity, and the current Luck Pillar and annual influences, striving to identify an optimal moment where heavenly timing, earthly advantage, and human harmony all converge.

六十四卦是《周易》的核心符号系统，由八个基本卦（乾、坤、震、巽、坎、离、艮、兑）两两组合而成。每一卦由六个爻（阴爻或阳爻）组成，代表一种特定的能量状态和变化趋势。在玄空大卦择日法中，六十四卦通过六十甲子（60 Jia Zi）的映射关系与历法紧密结合。 六十甲子是由十天干（甲至癸）与十二地支（子至亥）依序配对形成的六十组干支组合，是中国传统历法的基础计时单位。每一个甲子都对应着特定的卦象，这种对应关系使得我们能够将任何一个日期时间转换为卦象语言来分析。例如，甲子日对应的卦象与庚午日对应的卦象截然不同，它们所承载的能量特质也大相径庭。 在实际应用中，择日师会将年柱、月柱、日柱、时柱分别转换为对应的卦象，然后分析四个卦象之间的生克关系、卦气强弱以及与用事方位卦象的配合程度。理想的吉日是四柱卦象与方位卦象和谐相生、卦气旺盛且与用事者命理相合的日子。

The 64 Hexagrams form the core symbolic system of the Yi Jing (Book of Changes), created by combining the eight fundamental trigrams (Qian, Kun, Zhen, Xun, Kan, Li, Gen, Dui) in pairs. Each hexagram consists of six lines (yin or yang), representing a specific energy state and pattern of change. In the Xuan Kong Da Gua date selection method, the 64 Hexagrams are intimately linked to the calendar through their mapping relationship with the 60 Jia Zi cycle. The 60 Jia Zi is formed by sequentially pairing the Ten Heavenly Stems (Jia through Gui) with the Twelve Earthly Branches (Zi through Hai), creating sixty unique Stem-Branch combinations that serve as the foundational time-keeping units of the Chinese traditional calendar. Each Jia Zi corresponds to a specific hexagram, and this correspondence allows any date and time to be translated into hexagram language for analysis. For instance, the hexagram for a Jia-Zi day differs entirely from that of a Geng-Wu day, and the energy characteristics they carry are vastly different. In practical application, a date selection master converts the Year Pillar, Month Pillar, Day Pillar, and Hour Pillar into their corresponding hexagrams, then analyzes the producing and controlling relationships among the four hexagrams, the strength of hexagram qi, and the degree of compatibility with the hexagram of the activity's direction. An ideal auspicious date is one where the four pillar hexagrams harmonize with the directional hexagram, the hexagram qi is strong, and the overall configuration aligns with the user's personal destiny chart.

玄空大卦择日法的操作流程通常分为以下几个步骤。首先，明确用事目的——是搬家、开业、动土、嫁娶还是安葬？不同的事项对吉日的要求不同。其次，确定用事方位，即活动所涉及的地理坐向。第三，了解用事者的命理信息，尤其是八字中的日主和用神。 在具体选日时，择日师需要综合运用多种传统方法。最基础的是避开明显的凶日——如岁破日（与太岁相冲之日）、月破日（与月建相冲之日）以及各种传统禁忌日。在排除凶日之后，再从剩余的日子中筛选出卦气配合良好的吉日。 卦气配合的核心原则是“合”与“生”。所谓“合”，是指日课（所选择的年月日时组合）的卦象与坐山方位的卦象形成六合或三合等吉利组合。所谓“生”，是指日课卦象生助坐山卦象或用事者命理所需的五行。反之，如果日课卦象冲克坐山或命理用神，则为凶象，应当避免。 除此之外，择日还要注意“旺相”原则——选择的日子所在的月令应当使日课的核心五行处于旺盛或相助的状态，而非处于衰弱休囚的状态。这与八字命理中判断日主强弱的原理一脉相承。

The Xuan Kong Da Gua date selection method typically follows a structured process. First, clarify the purpose of the activity — is it a house move, business opening, groundbreaking, wedding, or burial? Different events have different requirements for auspicious dates. Second, determine the direction involved, meaning the geographic sitting and facing orientation of the activity. Third, understand the user's destiny chart information, particularly the Day Master and Yong Shen (Useful God) from their Bazi. When selecting a specific date, the practitioner must comprehensively employ multiple traditional methods. The most fundamental step is to eliminate obviously inauspicious days — such as Year Breaker days (days that clash with the Grand Duke / Tai Sui), Month Breaker days (days that clash with the Month Commander), and various traditional taboo days. After excluding inauspicious dates, the remaining days are then filtered for those with favorable hexagram qi compatibility. The core principles of hexagram qi compatibility are "harmony" and "production." "Harmony" means the hexagram of the date formula (the selected year-month-day-hour combination) forms auspicious combinations such as Six Harmonies or Three Harmonies with the hexagram of the sitting mountain direction. "Production" means the date formula's hexagram produces or supports the sitting mountain hexagram or the Five Element needs of the user's destiny chart. Conversely, if the date formula's hexagram clashes with or controls the sitting mountain or the Yong Shen, this indicates an inauspicious configuration and should be avoided. Additionally, date selection must observe the principle of "prosperous phase" — the month season of the chosen date should place the core Five Element of the date formula in a strong or supported state, rather than in a weak or imprisoned state. This principle is directly parallel to how Day Master strength is assessed in Bazi destiny analysis.

建除十二神是中国传统择日法中最古老、最常用的系统之一，也被称为“建除十二直”或“十二值日”。十二神依次为：建（Establish）、除（Remove）、满（Full）、平（Balance）、定（Stable）、执（Grasp）、破（Break）、危（Danger）、成（Success）、收（Receive）、开（Open）、闭（Close）。 这十二个日神按照固定的顺序循环轮值，每月从月建地支所对应的日子开始排列“建”日。例如，寅月（正月）的寅日为“建日”，卯日为“除日”，以此类推。每一个日神都有其特定的宜忌属性： “建日”为月建之日，百事可为但不宜动土；“除日”利于清除障碍、就医看病；“满日”象征圆满，适合祈福、婚嫁；“平日”万事平平，适合一般性事务；“定日”安定之日，宜开市、签约；“执日”执固之日，适合建造、修缮；“破日”为破坏之日，诸事不宜，唯利拆除破旧；“危日”有危险之象，需谨慎行事；“成日”万事可成，是最佳吉日之一；“收日”利于收获、收款、入库；“开日”适合开张、开工、开学；“闭日”关闭之象，适合收藏、筑堤，不宜开业出行。 在玄空大卦择日法中，建除十二神通常作为辅助参考。当卦气分析确定了若干候选吉日后，择日师会进一步参考十二神的属性来做最终选择。

The 12 Day Officers (Jian Chu Shi Er Shen) represent one of the oldest and most commonly used systems in Chinese traditional date selection, also known as the "Twelve Day Duties" or "Twelve Presiding Officers." The twelve officers cycle in sequence: Establish (Jian), Remove (Chu), Full (Man), Balance (Ping), Stable (Ding), Grasp (Zhi), Break (Po), Danger (Wei), Success (Cheng), Receive (Shou), Open (Kai), and Close (Bi). These twelve day officers rotate in a fixed sequence, with the "Establish" day beginning on the day whose Earthly Branch matches the Month Commander branch each month. For example, in the Yin month (first lunar month), the Yin day is the "Establish" day, the Mao day is the "Remove" day, and so on. Each day officer carries specific properties of what is favorable or unfavorable: "Establish" is the day of the Month Commander — most things are permissible but groundbreaking is not advised. "Remove" favors clearing obstacles, medical visits, and treatments. "Full" symbolizes completion and is excellent for blessings, prayers, and weddings. "Balance" is a neutral day suitable for routine affairs. "Stable" is a settled day, favorable for opening businesses and signing contracts. "Grasp" is a firm day, good for construction and renovation. "Break" is a day of destruction — most activities are unfavorable, though demolition is acceptable. "Danger" carries a sense of risk, requiring extra caution. "Success" means all things can be accomplished and is one of the best auspicious days. "Receive" favors harvesting, collecting payments, and warehousing. "Open" suits grand openings, commencing work, and starting school. "Close" symbolizes shutting down — good for storage and dam-building, but unfavorable for starting businesses or travel. In the Xuan Kong Da Gua date selection method, the 12 Day Officers typically serve as a supplementary reference. After hexagram qi analysis narrows down several candidate dates, the practitioner further consults the day officer attributes to make the final selection.

二十八宿（Er Shi Ba Xiu）是中国古代天文学将黄道附近的星空划分为二十八个星区的系统，也是传统择日法中的重要参考依据。二十八宿分属四象：东方青龙七宿（角、亢、氐、房、心、尾、箕）、北方玄武七宿（斗、牛、女、虚、危、室、壁）、西方白虎七宿（奎、娄、胃、昴、毕、觜、参）、南方朱雀七宿（井、鬼、柳、星、张、翼、轸）。 每一宿都有其对应的吉凶属性和宜忌事项。例如，“房宿”（Room）为吉宿，利于嫁娶、造作、安葬；“心宿”（Heart）为凶宿，不宜进行重大事务；“角宿”（Horn）利于动土、修建。在传统通胜（黄历）中，每日都会标注当日值宿，供人们参考。 二十八宿择日法的应用原理较为直观——选择吉宿值日的日期进行重要活动，避开凶宿值日的日期。但在高级应用中，还需要将宿的五行属性与用事的五行需求相配合。二十八宿各有五行归属，如角木蛟（木）、亢金龙（金）、氐土貉（土）等，这些五行属性在与八字命理和玄空卦象的综合分析中发挥着辅助作用。 在完整的玄空大卦择日实践中，择日师会将建除十二神、二十八宿与大卦卦气分析三者结合使用，形成多层验证的择日体系，以确保所选日期在各个维度上都具有吉利的能量特质。

The 28 Lunar Mansions (Er Shi Ba Xiu) are an ancient Chinese astronomical system that divides the sky near the ecliptic into 28 stellar zones, and they serve as an important reference in traditional date selection. The 28 Mansions are grouped under four celestial animals: the seven Eastern Green Dragon mansions (Horn, Neck, Root, Room, Heart, Tail, Basket), the seven Northern Black Tortoise mansions (Dipper, Ox, Girl, Void, Danger, Encampment, Wall), the seven Western White Tiger mansions (Legs, Bond, Stomach, Hairy Head, Net, Turtle Beak, Three Stars), and the seven Southern Red Bird mansions (Well, Ghost, Willow, Star, Extended Net, Wings, Chariot). Each mansion carries its own auspicious or inauspicious attributes and activity recommendations. For example, the "Room" mansion is auspicious and favors weddings, construction, and burials; the "Heart" mansion is inauspicious and unsuitable for major undertakings; the "Horn" mansion favors groundbreaking and construction. In the traditional Tong Shu (Chinese almanac), each day is annotated with its presiding mansion for public reference. The application principle of the 28 Mansions in date selection is relatively straightforward — choose dates when auspicious mansions preside for important activities, and avoid dates governed by inauspicious mansions. In advanced applications, however, the Five Element attribute of the mansion must also be matched with the Five Element requirements of the activity. Each of the 28 Mansions has a Five Element attribution — such as Horn-Wood-Flood Dragon (Wood), Neck-Metal-Dragon (Metal), Root-Earth-Badger (Earth) — and these elemental attributes play a supporting role in comprehensive analysis alongside Bazi destiny charts and Xuan Kong hexagram readings. In complete Xuan Kong Da Gua date selection practice, the master combines the 12 Day Officers, the 28 Lunar Mansions, and the Da Gua hexagram qi analysis into a multi-layered verification system, ensuring the selected date possesses auspicious energy characteristics across all dimensions.

玄空大卦择日法在日常生活中有着广泛的应用场景。以下是几个最常见的用例： 婚嫁择日：结婚是人生大事，择日尤为重要。除了避开传统的凶日之外，还需确保日课与新人双方八字的用神相合，日课卦象与婚礼场地坐向形成吉利配合。理想的婚嫁日应在“成日”或“满日”值日，二十八宿中以房、壁、翼、斗等吉宿为佳。 开业择日：商铺开业同样讲究天时地利。日课的卦气应当生旺店铺的坐向卦象，同时与店主八字中的财星（正财、偏财）相关五行形成生助关系。宜选“开日”或“成日”，避开“破日”和“闭日”。 搬家择日：入伙（搬入新居）是改变居住环境的重大事件。择日时需考虑新居的坐向、屋主的命理以及当年的太岁方位，确保不犯三煞、五黄等凶煞。 动土修建：无论是新建房屋还是装修改造，动土日的选择直接关系到工程的顺利与否。必须避开太岁方、三煞方的动土禁忌，同时选择卦气旺盛的日子开工。 在使用我们的择日工具时，系统会自动计算所选日期的建除十二神、二十八宿以及六十甲子卦象信息，帮助您快速筛选适合特定用途的吉日。结合您的八字命盘信息，我们还能提供个性化的择日建议，让择日变得简单而精准。

The Xuan Kong Da Gua date selection method has wide-ranging applications in everyday life. Here are several of the most common use cases: Wedding Date Selection: Marriage is one of life's greatest milestones, making date selection especially important. Beyond avoiding traditionally inauspicious days, one must ensure the date formula harmonizes with the Yong Shen (Useful God) of both the bride and groom's Bazi charts, and that the date formula hexagram forms an auspicious configuration with the wedding venue's sitting direction. An ideal wedding date should fall on a "Success" or "Full" day officer, with favorable mansions such as Room, Wall, Wings, or Dipper among the 28 Mansions. Business Opening: The timing of a grand opening likewise demands attention to heavenly timing and earthly advantage. The date formula's hexagram qi should produce and strengthen the shop's sitting direction hexagram, while simultaneously forming a supporting relationship with the Five Elements associated with the shop owner's wealth stars (Direct Wealth and Indirect Wealth) in their Bazi. "Open" or "Success" day officers are preferred; "Break" and "Close" should be avoided. Moving House: Moving into a new residence is a significant event that changes one's living environment. Date selection must consider the new home's sitting direction, the homeowner's destiny chart, and the year's Grand Duke (Tai Sui) direction, ensuring no conflict with the Three Killings, Five Yellow, or other malevolent influences. Groundbreaking and Construction: Whether building a new house or renovating, the choice of groundbreaking date directly affects how smoothly the project proceeds. One must avoid taboos related to disturbing the Grand Duke and Three Killings directions, while selecting a day when the hexagram qi is strong and vigorous. When using our date selection tool, the system automatically calculates the 12 Day Officers, 28 Lunar Mansions, and 60 Jia Zi hexagram information for the selected date, helping you quickly filter auspicious days for specific purposes. Combined with your Bazi chart information, we can also provide personalized date selection recommendations, making the process both simple and precise.