Four Pillars Chart Construction — Drawing the Blueprint of Your Life

I. From Symbol to Practice: The First Step in Opening a Destiny Chart

In the preceding three chapters, we completed a theoretical journey from the general to the specific: Chapter One outlined the historical context and philosophical positioning of BaZi (Four Pillars of Destiny) destiny analysis; Chapter Two laid the theoretical foundation of Yin and Yang and the Five Elements; Chapter Three introduced each of the twenty-two fundamental symbols — the Heavenly Stems and Earthly Branches — providing an understanding of their individual attributes, imagery, and functional roles. At this point, we have mastered the "grammar" and "alphabet" of destiny analysis.

Now is the time to put theory into practice.

This chapter is the first genuinely practical chapter in the entire book. We will provide a step-by-step demonstration of how to construct a complete Four Pillars Destiny Chart based on a person's year, month, day, and hour of birth. If the previous three chapters taught the reader to recognize the pieces and rules of the game, this chapter teaches how to place those pieces on the board — only by accurately constructing the Destiny Chart can all subsequent analyses of the Ten Gods, the strength or weakness of the Day Master, and the Useful God and Unfavorable God proceed from a reliable foundation.

The process of chart construction is not inherently complex, but it contains several technical details that are easily overlooked — the year boundary falls at the Start of Spring rather than the first day of the first lunar month; months are defined by solar terms rather than lunar months; True Solar Time correction; and the attribution of the late Zi hour — any one of these details, if neglected, can lead to an incorrectly constructed Destiny Chart and cause the entire analysis to go astray. This chapter will therefore explain, with rigor and patience, the method for determining each pillar, and will conclude with a complete worked example and recommended practical tools.

II. The Year Pillar: The Distinction of the Year's Beginning at the Start of Spring

The Fundamental Principle for Determining the Year Pillar

The Year Pillar is the first of the Four Pillars to be determined. Each year corresponds to a pair of Heavenly Stem and Earthly Branch — for example, 2024 is the year of Jia (Yang Wood) Chen, and its Year Pillar is accordingly Jia (Yang Wood) Chen. The sixty-cycle Jiazi rotates ceaselessly, repeating every sixty years; thus, determining the Year Pillar is essentially a matter of locating the corresponding position of a given year (in the Gregorian or lunar calendar) within the sixty-cycle table.

However, there is a critically important principle here, and the most common mistake made by beginners: In BaZi (Four Pillars of Destiny) analysis, the transition from one year to the next is marked by the Start of Spring (Lìchūn), not by the first day of the first lunar month.

The Start of Spring is the first of the twenty-four solar terms, typically falling between February 3rd and 5th in the Gregorian calendar. Within the BaZi system, the Start of Spring is the true beginning of the year. This means that a person born after the first day of the first lunar month but before the Start of Spring should still have their Year Pillar arranged according to the Heavenly Stem and Earthly Branch of the preceding year. For example, if a person was born on February 2nd, 2024 (before the Start of Spring on that date), even though the lunar calendar may already place this date within the year of Jia (Yang Wood) Chen, the Year Pillar in BaZi chart construction should still take the Gui (Yin Water) Mao of 2023, not the Jia (Yang Wood) Chen of 2024.

Why is this so? It relates to the fundamental stance of BaZi destiny analysis. BaZi uses solar terms as its organizing framework, and solar terms reflect the true position of the sun along the ecliptic — that is, the actual astronomical relationship between the Earth and the Sun. Although the lunar calendar also references solar terms, its year-beginning (the first day of the first lunar month) is a human convention based on the synodic lunar cycle and does not precisely correspond to the beginning and end of an astronomical cycle. The Start of Spring, as the precise moment when the sun reaches the 315th degree of celestial longitude, marks the true beginning of yang energy's ascent and the transformation of all things from dormancy into growth — and this is the astronomical basis for the transition of "the year's energy" within the BaZi system.

Practical Methods for Looking Up the Year Pillar

For modern readers, the most convenient way to determine the Year Pillar is to consult a perpetual calendar (wànniánlì) or use a reliable online chart construction tool. The key is to confirm whether the birth time has passed the exact moment of that year's Start of Spring (accurate to the hour and minute). Most reputable perpetual calendars and chart construction software will handle this automatically, but readers should nonetheless maintain clear awareness of this principle — particularly for those born within a few days before or after the Start of Spring, careful verification is essential.

The Year Pillar in the Destiny Chart represents the ancestral line, family roots, and fortunes of the early years — it is the most distant and most macroscopic layer of background color in the life blueprint of the chart subject.

III. The Month Pillar: The Precise Rules of Solar-Term Month Determination

Solar-Term Month Determination: The Core of the Destiny Analysis Calendar

The determination of the Month Pillar is the most precisely regulated step in Four Pillars chart construction, and the one that most fully embodies the unique calendrical perspective of BaZi destiny analysis.

The core principle is: BaZi destiny analysis determines months by solar terms, not by lunar months.

Specifically, a year is divided into twelve monthly segments by twelve "nodes" (jié, as distinguished from "mid-points," qì). Each month begins with a single "node":

| Month | Starting Solar Term | Earthly Branch | Five Elements | |-------|---------------------|----------------|---------------| | 1st Month | Start of Spring (Lìchūn) | Yin | Wood | | 2nd Month | Awakening of Insects (Jīngzhé) | Mao | Wood | | 3rd Month | Clear and Bright (Qīngmíng) | Chen | Earth | | 4th Month | Start of Summer (Lìxià) | Si | Fire | | 5th Month | Grain in Ear (Mángzhòng) | Wu | Fire | | 6th Month | Minor Heat (Xiǎoshǔ) | Wei | Earth | | 7th Month | Start of Autumn (Lìqiū) | Shen | Metal | | 8th Month | White Dew (Báilù) | You | Metal | | 9th Month | Cold Dew (Hánlù) | Xu | Earth | | 10th Month | Start of Winter (Lìdōng) | Hai | Water | | 11th Month | Major Snow (Dàxuě) | Zi | Water | | 12th Month | Minor Cold (Xiǎohán) | Chou | Earth |

It should be noted that the "1st month," "2nd month," and so on here are not lunar months, but rather the destiny-analysis months divided by solar terms. For example, a person born in the early days of the second lunar month, but whose birth time has not yet reached the Awakening of Insects solar term, will still have Yin (not Mao) as the Earthly Branch of their Month Pillar. Likewise, a person born in the first lunar month but before the Start of Spring will have Chou as the Earthly Branch of their Month Pillar (the twelfth month of the preceding year), and their Year Pillar will simultaneously revert to the previous year.

The Pairing of the Month Pillar's Earthly Branch and Heavenly Stem

The Earthly Branch of the Month Pillar is determined directly by the birth month (as defined by solar terms), with the twelve months fixed in correspondence to the twelve Earthly Branches from Yin through Chou. The Heavenly Stem of the Month Pillar must then be calculated based on the Heavenly Stem of the Year Pillar, following the mnemonic for the "Five Tiger Pursuit of the Month" (wǔhǔ dùn yuè):

In years of Jia (Yang Wood) and Ji (Yin Earth), Bing (Yang Fire) leads the first month; In years of Yi (Yin Wood) and Geng (Yang Metal), Wu (Yang Earth) takes the head; In years of Bing (Yang Fire) and Xin (Yin Metal), seek Geng (Yang Metal) at the start; In years of Ding (Yin Fire) and Ren (Yang Water), Ren (Yang Water) Yin flows with the current; If you ask where Wu (Yang Earth) and Gui (Yin Water) begin, look for Jia (Yang Wood) Yin as the starting point.

The meaning is as follows: in years whose Day Master is Jia (Yang Wood) or Ji (Yin Earth), the first month (Yin month) begins with the Heavenly Stem Bing (Yang Fire); in years whose Day Master is Yi (Yin Wood) or Geng (Yang Metal), the first month begins with Wu (Yang Earth); in years whose Day Master is Bing (Yang Fire) or Xin (Yin Metal), the first month begins with Geng (Yang Metal); in years whose Day Master is Ding (Yin Fire) or Ren (Yang Water), the first month begins with Ren (Yang Water); in years whose Day Master is Wu (Yang Earth) or Gui (Yin Water), the first month begins with Jia (Yang Wood). Once the Heavenly Stem of the first month is established, subsequent months are derived by continuing in sequence.

The Month Governor: The Keynote of the Destiny Chart

As noted in the preceding chapter, the Earthly Branch of the Month Pillar is the "Month Governor" (yuèlìng) — the primary basis for assessing the distribution of Five Elements strength within the Destiny Chart. The Yuanhai Ziping (Profound Sea of Ziping) describes the Month Governor as the "keynote" of the Destiny Chart — analogous to the central thesis of an essay, governing the whole. The Month Governor determines which of the Five Elements is at its peak of strength in a given month, and which are in states of rest, imprisonment, or decline. Whether the Day Master "obtains the Month Governor" — that is, whether the Day Master's Five Elements receive the support of abundance from the Month Governor — is the primary consideration in assessing the Day Master's strength or weakness. This critical analysis will be developed in detail in Chapter Six.

IV. The Day Pillar: The Core of the Destiny Chart and the Locus of "Self"

Determining the Day Pillar

The arrangement of the Day Pillar is technically the most straightforward, yet also the most impervious to shortcuts — the Heavenly Stem and Earthly Branch of the Day Pillar must be determined by consulting a perpetual calendar. There is no convenient formula for calculation.

The sexagenary cycle for days operates on the same logic as that for years and months, recording each day in the continuous rotation of the sixty-cycle Jiazi. However, because the daily Heavenly Stem and Earthly Branch sequence runs as an independent system (unaffected by the solar term nodes of years and months, flowing continuously in unbroken succession), it is impossible to derive the Day Pillar's Heavenly Stem and Earthly Branch from the year and month information of a birth date alone — a perpetual calendar or chart construction tool must be consulted.

In practical application, modern readers are well advised to make use of digital tools — there are numerous reliable perpetual calendar websites and BaZi chart construction applications available, which will directly yield the Day Pillar's Heavenly Stem and Earthly Branch upon entry of the Gregorian birth date. One critical point must be observed, however: most chart construction systems use the Zi hour (23:00) as the reference point for the day change, meaning that those born after 11 PM have their Day Pillar advance to the Heavenly Stem and Earthly Branch of the following day. However, the attribution of the Day Pillar for those born in the late Zi hour (23:00–00:00) is a matter of divergent opinion among different schools of destiny analysis — this is addressed specifically in the section on the Hour Pillar below.

The Day Master: The Central Reference Point of the Entire Destiny Chart

The Heavenly Stem of the Day Pillar is the Day Master — one of the most fundamental concepts in BaZi (Four Pillars of Destiny) analysis.

In the preceding chapter, we came to know the individual characters of the ten Heavenly Stems. When a particular Heavenly Stem becomes a person's Day Master, it is no longer merely an abstract symbol, but becomes the representative of "I" — the innate endowment, core qualities, and energetic keynote of the chart subject themselves. All subsequent destiny analysis proceeds from the Day Master as its point of departure: the derivation of the Ten Gods examines the generating and overcoming relationships between the other Heavenly Stems and Earthly Branches and the Day Master; the assessment of the Day Master's strength or weakness examines how much support or drain the Day Master receives within the overall Destiny Chart; the selection of the Useful God examines what the Destiny Chart requires to help the Day Master achieve balance — all assessments of fortune and misfortune are derived with the Day Master as the "I" from which they are reckoned.

If the Destiny Chart is compared to a map, the Day Master is the "You Are Here" marker on that map. Without this reference point, all information on the map loses its sense of direction.

The Earthly Branch of the Day Pillar is equally significant — it is referred to as the "Day Branch" or "Spouse Palace," and within BaZi analysis it carries core information about the marital relationship, intimate partners, and the chart subject's inner emotional patterns. The Five Elements attribute of the Day Branch, the Heavenly Stems hidden within it, and its Punishment, Clash, Combination, Harm relationships with the Earthly Branches of the other pillars are all important bases for interpreting questions of emotional life — these will be explored in detail in subsequent chapters.

V. The Hour Pillar: The Final Stroke of the Life Blueprint

The Division of the Hours

The Hour Pillar is the last of the Four Pillars to be determined, corresponding to the Heavenly Stem and Earthly Branch of the birth hour. Chinese tradition divides a day (24 hours) equally into twelve two-hour periods using the twelve Earthly Branches:

| Earthly Branch | Time Period | |----------------|-------------| | Zi Hour | 23:00–01:00 | | Chou Hour | 01:00–03:00 | | Yin Hour | 03:00–05:00 | | Mao Hour | 05:00–07:00 | | Chen Hour | 07:00–09:00 | | Si Hour | 09:00–11:00 | | Wu Hour | 11:00–13:00 | | Wei Hour | 13:00–15:00 | | Shen Hour | 15:00–17:00 | | You Hour | 17:00–19:00 | | Xu Hour | 19:00–21:00 | | Hai Hour | 21:00–23:00 |

The Earthly Branch of the Hour Pillar is determined directly by the birth time period. The Heavenly Stem of the Hour Pillar is calculated in a manner similar to that of the Month Pillar — it must be derived from the Heavenly Stem of the Day Pillar, following the mnemonic for the "Five Rat Pursuit of the Hour" (wǔshǔ dùn shí):

Jia (Yang Wood) and Ji (Yin Earth) return to add Jia (Yang Wood); Yi (Yin Wood) and Geng (Yang Metal) begin with Bing (Yang Fire); Bing (Yang Fire) and Xin (Yin Metal) start from Wu (Yang Earth); Ding (Yin Fire) and Ren (Yang Water) place Geng (Yang Metal) at Zi; Where do Wu (Yang Earth) and Gui (Yin Water) originate? Ren (Yang Water) at Zi is the true path.

That is: when the Day Master is Jia (Yang Wood) or Ji (Yin Earth), the Zi hour begins with the Heavenly Stem Jia (Yang Wood); when the Day Master is Yi (Yin Wood) or Geng (Yang Metal), the Zi hour begins with Bing (Yang Fire); when the Day Master is Bing (Yang Fire) or Xin (Yin Metal), the Zi hour begins with Wu (Yang Earth); when the Day Master is Ding (Yin Fire) or Ren (Yang Water), the Zi hour begins with Geng (Yang Metal); when the Day Master is Wu (Yang Earth) or Gui (Yin Water), the Zi hour begins with Ren (Yang Water). Once the Heavenly Stem of the Zi hour is established, the remaining hours are derived by continuing in the sequence of Heavenly Stems to the birth hour.

The Hour Pillar in the Destiny Chart represents children, the circumstances of old age, and the chart subject's deep inner world — it is the most private of the Four Pillars, and the one most oriented toward the future.

The Special Problem of the Late Zi Hour

The Zi hour straddles two days — from 23:00 of the current day to 01:00 of the following day. This gives rise to a technical question that has long been debated in destiny analysis circles: For those born between 23:00 and 00:00 (the "late Zi hour" or "early Zi hour"), should the Day Pillar advance to the Heavenly Stem and Earthly Branch of the following day?

Two principal views exist within the traditional destiny analysis community. One school holds that once 23:00 has passed, the next day's Zi hour has begun, and the Day Pillar should take the following day's Heavenly Stem and Earthly Branch. The other school maintains that the late Zi hour (23:00–00:00) still belongs to the current day for the purposes of the Day Pillar, with the Earthly Branch of the Hour Pillar taking Zi, and the Day Pillar only formally advancing at 00:00. Both views have their theoretical foundations and practical verifications. This book recommends that when readers encounter a case involving a birth during the late Zi hour, they construct the chart both ways and verify against the chart subject's known life experiences, adopting whichever proves the more accurate. For beginners, awareness of the existence of this debate is more important than rushing to take a position.

VI. True Solar Time Correction: A Precision Issue That Cannot Be Ignored

When determining the Hour Pillar, there is one more extremely important yet commonly overlooked technical detail: True Solar Time correction.

The clock time we use in daily life is "Beijing Standard Time" (local mean solar time at 120° East longitude), but China spans a vast territory, stretching across five time zones from east to west. A person born in Ürümqi, Xinjiang (approximately 87° East) and a person born in Shanghai (approximately 121° East) experience the actual position of the sun more than two hours apart, even if their clocks show the same time. The division of hours in BaZi destiny analysis is based on the true movement of the sun; strictly speaking, therefore, the clock time of the birth location should be corrected to the local True Solar Time when constructing the chart.

True Solar Time correction involves two factors: first, the time difference correction for longitude (a difference of 1 degree of longitude corresponds to a time difference of 4 minutes); second, the correction for the "equation of time" — because the Earth's orbit is elliptical, a periodic discrepancy exists between True Solar Time and mean solar time, reaching a maximum of approximately sixteen minutes at certain points in the year.

For a person born near the boundary between two hours (for example, born at 10:55 AM, right at the transition between the Si hour and the Wu hour), a correction of a few minutes may directly change the Earthly Branch of the Hour Pillar, thereby affecting the entire structure of the Destiny Chart. Although True Solar Time correction may appear trivial, it is therefore a necessary step in ensuring the accuracy of the Destiny Chart. Fortunately, most modern chart construction tools already have True Solar Time correction built in — readers need only enter the birth location and clock time accurately.

VII. Arranging the Hidden Stems of the Earthly Branches: The Hidden Information Layer of the Destiny Chart

After completing the arrangement of the eight characters of the Four Pillars, the work of chart construction is not entirely finished. We must also annotate the hidden stems (cánggān) of each of the four Earthly Branches — these hidden stems, although they do not appear on the "visible surface" of the Four Pillars, form an indispensable layer of hidden information within the Destiny Chart.

The preceding chapter introduced in detail the Heavenly Stems hidden within each of the twelve Earthly Branches. In the practice of chart construction, annotating the hidden stems of the Four Pillars' Earthly Branches one by one is equivalent to unfolding the Destiny Chart from its "surface layer" into its "deeper layer" — these hidden stems will participate in the comprehensive derivation of the Ten Gods, and are also the direct basis for determining whether the Day Master has "roots" in each of the pillars.

For example, if the Day Master is Jia (Yang Wood) Wood, and a certain Earthly Branch in the Four Pillars is Yin, then Yin contains the hidden stems Jia (Yang Wood), Bing (Yang Fire), and Wu (Yang Earth). The Day Master thus has a root in its own original energy within Yin, and its strength receives powerful support. The presence or absence and depth of such "roots" will become a key indicator for assessing the Day Master's strength or weakness in Chapter Six.

VIII. Starting the Major Luck Cycles: The Timeline of Life's Rhythms

After establishing the Four Pillars and the hidden stems of the Earthly Branches, a complete Destiny Chart must also annotate the Major Luck Cycles — these form the foundation of the dynamic predictive system in BaZi destiny analysis.

The Major Luck Cycles begin from the Month Pillar, following these rules:

For yang-year males and yin-year females, the Major Luck Cycles proceed in forward order — beginning from the Heavenly Stem and Earthly Branch of the Month Pillar and continuing in the forward sequence of the sixty-cycle Jiazi. For yin-year males and yang-year females, the Major Luck Cycles proceed in reverse order — beginning from the Heavenly Stem and Earthly Branch of the Month Pillar and continuing in the reverse sequence of the sixty-cycle Jiazi. Here, "yang years" are years whose Heavenly Stem is Jia (Yang Wood), Bing (Yang Fire), Wu (Yang Earth), Geng (Yang Metal), or Ren (Yang Water); "yin years" are years whose Heavenly Stem is Yi (Yin Wood), Ding (Yin Fire), Ji (Yin Earth), Xin (Yin Metal), or Gui (Yin Water).

Each step of the Major Luck Cycles governs ten years. The method for calculating the age at which the Major Luck Cycles begin is as follows: starting from the birth date, those who proceed in forward order count forward to the next solar term node; those who proceed in reverse order count backward to the previous solar term node. The number of days thus counted is divided by three; the quotient represents the age at which the Major Luck Cycles begin (with one remaining day equaling approximately four months). For example, if a chart subject proceeding in forward order has 21 days from their birth date to the next solar term, the starting age of the Major Luck Cycles is 7 — meaning the first step of the Major Luck Cycles begins at age 7.

The Major Luck Cycles are like the great backdrop of life, changing its overall color every ten years. When the Five Elements of a Major Luck Cycle are precisely what the Destiny Chart needs as the Useful God, that decade will generally be smooth and prosperous. When the Five Elements of a Major Luck Cycle are the Unfavorable God, that period is more likely to bring challenges and difficulties. The interaction between the Major Luck Cycles and the Annual Luck constitutes the core framework of dynamic prediction in BaZi destiny analysis — the Major Luck Cycles provide the broad background for each decade, while the Annual Luck paints in the details year by year against that background. Detailed methods of analysis for the Major Luck Cycles and Annual Luck will be developed in dedicated chapters later in the book.

IX. A Complete Chart Construction Example

The theoretical exposition thus far has systematically covered every stage of Four Pillars chart construction. We will now connect all the steps through two complete examples, giving readers a hands-on experience from beginning to end.

Case One: Standard Chart Construction

Birth Information: Male, Gregorian calendar April 15, 1990, 8:30 AM, born in Beijing.

Step One: Determine the Year Pillar.

The Start of Spring in 1990 fell on February 4th. The birth date of April 15th has already passed the Start of Spring; therefore, the Year Pillar takes the 1990 Heavenly Stem and Earthly Branch combination. Consulting the perpetual calendar, 1990 is the year of Geng (Yang Metal) Wu. Year Pillar: Geng (Yang Metal) Wu.

Step Two: Determine the Month Pillar.

April 15th falls after Clear and Bright (April 5th) but before Start of Summer (May 6th), corresponding to the destiny-analysis third month; the Earthly Branch is Chen. The Year Heavenly Stem is Geng (Yang Metal). Applying the Five Tiger Pursuit mnemonic — "In years of Yi (Yin Wood) and Geng (Yang Metal), Wu (Yang Earth) takes the head" — the first month (Yin month) begins with the Heavenly Stem Wu (Yang Earth). Continuing in sequence: Yin month is Wu (Yang Earth), Mao month is Ji (Yin Earth), Chen month is Geng (Yang Metal). Month Pillar: Geng (Yang Metal) Chen.

Step Three: Determine the Day Pillar.

Consulting the perpetual calendar, the Day Pillar Heavenly Stem and Earthly Branch for April 15, 1990 is Ren (Yang Water) Zi. Day Pillar: Ren (Yang Water) Zi.

Step Four: Determine the Hour Pillar.

The birth location is Beijing (approximately 116.4° East). Beijing Standard Time is based on 120° East longitude; the longitude difference is approximately 3.6 degrees, requiring a time correction of approximately minus 14.4 minutes. Adding the equation of time correction for that date (approximately 0 minutes around mid-April), the True Solar Time is approximately 8:15, which remains within the Chen hour (07:00–09:00). The Hour Pillar Earthly Branch is Chen. The Day Heavenly Stem is Ren (Yang Water). Applying the Five Rat Pursuit mnemonic — "Ding (Yin Fire) and Ren (Yang Water) place Geng (Yang Metal) at Zi" — the Zi hour begins with the Heavenly Stem Geng (Yang Metal). Continuing in sequence: Zi hour is Geng (Yang Metal), Chou hour is Xin (Yin Metal), Yin hour is Ren (Yang Water), Mao hour is Gui (Yin Water), Chen hour is Jia (Yang Wood). Hour Pillar: Jia (Yang Wood) Chen.

Step Five: Annotate the Hidden Stems of the Earthly Branches.

• Year Branch Wu: contains Ding (Yin Fire), Ji (Yin Earth)
• Month Branch Chen: contains Wu (Yang Earth), Yi (Yin Wood), Gui (Yin Water)
• Day Branch Zi: contains Gui (Yin Water)
• Hour Branch Chen: contains Wu (Yang Earth), Yi (Yin Wood), Gui (Yin Water)

Step Six: Begin the Major Luck Cycles.

The Year Heavenly Stem Geng (Yang Metal) is a yang stem; for a yang-year male, the Major Luck Cycles proceed in forward order. Beginning from the Month Pillar of Geng (Yang Metal) Chen, continue in the forward sequence of the sixty-cycle Jiazi: the first step is Xin (Yin Metal) Si, the second is Ren (Yang Water) Wu, the third is Gui (Yin Water) Wei, the fourth is Jia (Yang Wood) Shen, the fifth is Yi (Yin Wood) You, and so on.

Calculating the starting age: from the birth date of April 15th, counting forward to the next solar term, Start of Summer (May 6th), gives 21 days. 21 ÷ 3 = 7; the starting age of the Major Luck Cycles is 7. That is, the first step of the Major Luck Cycles (Xin (Yin Metal) Si) begins at age 7; the second step (Ren (Yang Water) Wu) begins at age 17; the third step (Gui (Yin Water) Wei) begins at age 27; and so on.

Complete Destiny Chart Overview:

| | Year Pillar | Month Pillar | Day Pillar | Hour Pillar | |---|---|---|---|---| | Heavenly Stem | Geng (Yang Metal) | Geng (Yang Metal) | Ren (Yang Water) | Jia (Yang Wood) | | Earthly Branch | Wu | Chen | Zi | Chen | | Hidden Stems | Ding (Yin Fire), Ji (Yin Earth) | Wu (Yang Earth), Yi (Yin Wood), Gui (Yin Water) | Gui (Yin Water) | Wu (Yang Earth), Yi (Yin Wood), Gui (Yin Water) |

The Day Master is Ren (Yang Water) Water, born in the Chen month (after Clear and Bright). Chen contains the residual energy of Gui (Yin Water) Water, and the Day Branch Zi Water provides a strong root for the Day Master. The detailed analysis of this Destiny Chart will be progressively developed in subsequent chapters.

Case Two: A Special Case Involving the Start of Spring Boundary, True Solar Time, and the Late Zi Hour

Birth Information: Female, Gregorian calendar February 4, 2019, 11:20 PM, born in Chengdu, Sichuan.

This case involves three technical challenges: the Start of Spring boundary, the attribution of the late Zi hour, and True Solar Time correction for a western location.

Step One: Determine the Year Pillar — Precise Judgment at the Start of Spring Boundary.

The exact moment of the Start of Spring in 2019 was February 4th at 11:14 AM (Beijing Standard Time). The birth time of 23:20 on that same date has already passed the Start of Spring; therefore, the Year Pillar takes the 2019 Heavenly Stem and Earthly Branch combination. 2019 is the year of Ji (Yin Earth) Hai. Year Pillar: Ji (Yin Earth) Hai.

If this person had been born at 10:00 AM on that same day (before the Start of Spring), the Year Pillar should still be taken as Wu (Yang Earth) Xu of 2018, and not Ji (Yin Earth) Hai — this is the practical application of the Start of Spring year-change principle.

Step Two: Determine the Month Pillar.

February 4th has passed the Start of Spring but not yet reached the Awakening of Insects (March 6th, 2019), and therefore belongs to the destiny-analysis first month; the Earthly Branch is Yin. The Year Heavenly Stem is Ji (Yin Earth). Applying the Five Tiger Pursuit mnemonic — "In years of Jia (Yang Wood) and Ji (Yin Earth), Bing (Yang Fire) leads the first month" — the first month begins with Bing (Yang Fire). Month Pillar: Bing (Yang Fire) Yin.

Step Three: Determine the Day Pillar — Two Approaches to Late Zi Hour Attribution.

Consulting the perpetual calendar, the Day Pillar Heavenly Stem and Earthly Branch for February 4, 2019 is Jia (Yang Wood) Xu, and for February 5, 2019 it is Yi (Yin Wood) Hai.

The birth time is 23:20, which has already entered the Zi hour. The late Zi hour controversy applies here:

• Option A (day changes at 23:00): The Day Pillar takes the following day's Yi (Yin Wood) Hai. The Day Master is Yi (Yin Wood) Wood.
• Option B (late Zi hour does not change the day): The Day Pillar still takes the current day's Jia (Yang