Yin Wood Pig (Yi Hai, 乙亥) day pillar
A Yin Wood day master, the Vine, sitting on the Pig.
Your day pillar is the pair of characters for the day you were born. The top one, the stem, is your day master — you. The bottom one, the branch, is what it sits on. The sixty pillars come round in turn, one a day, so about one person in sixty was born on a Yi Hai day.
Its sound element: Fire on the Mountain (Shan Tou Huo, 山头火)
The sixty pillars go in pairs, and each pair carries a sound element (Na Yin, 纳音) — an image, separate from the element of the stem. The classic San Ming Tong Hui (三命通会) describes each pillar by it:
The heat of fire; likes Earth, and summer.
火之热气,喜土及夏
What the Pig holds, and what it is to Yin Wood
Each branch holds one to three stems. The ones under your own day master are the closest things to you in the chart.
- Yang Water (Ren, 壬), the main one — Direct Resource (Zheng Yin, 正印). What produces you, opposite polarity. Straightforward support: what teaches, shelters and backs you.
- Yang Wood (Jia, 甲) — Rob Wealth (Jie Cai, 劫财). Same element, opposite polarity. A peer who takes rather than shares — the tradition reads it as what draws on your resources through people close to you.
In San Ming Tong Hui’s section on where each stem is born and dies, the Pig is where Yin Wood dies (Si, 死).
A Yi Hai day at each birth hour: San Ming Tong Hui (三命通会)
Two volumes of this classic go hour by hour, and at each hour say something about this exact day pillar. These are its sentences on a Yi Hai day; what it says about the other five Yin Wood days is on the Yin Wood day master page. Hours are true solar time, not clock time.
Rat hour 23:00–01:00 · Yang Fire Rat (Bing Zi, 丙子)
transforming to blue and red, it governs blessing. Born in a Metal Dragon (庚辰) year or month, wealth and rank. Pure Pig (亥), made and unmade. An Ox (丑) month running a southern period, a junior office. Snake (巳), Horse (午) and western periods, extremely poor. It dislikes a Water Dragon (壬辰) month, punishment; a Wood Rooster (乙酉) month breaks the ancestors, highly noble, and dies badly in the midst of it.
化青赤,主福。生庚辰年月,富贵。纯亥,成败。丑月,行南运郎官。巳午西运,极贫。忌壬辰月,刑;乙酉月,破祖高贵,中恶死。六乙贵格丙子时,如无冲破始为奇;不遇庚申巳酉丑,定乘轩冕拜丹墀。
Ox hour 01:00–03:00 · Yin Fire Ox (Ding Chou, 丁丑)
a Pig (亥) month, the temper quick with self-command, the wife worthy and the children filial, office to the sixth or seventh grade. A Horse (午) month is its long life; with officer and Resource (印) showing at the stems in year or month, greatly noble.
亥月,性急有操持,妻贤子孝,官至六七品。午月长生,年月透官印,大贵。仓库时开乙见丁,食神坐库禄财亲。无匙不作朝中客,也是清闲有福人。
Tiger hour 03:00–05:00 · Yang Earth Tiger (Wu Yin, 戊寅)
spring favourable, summer toilsome, autumn and winter noble. Rat (子) and Ox (丑) in year or month, noble to the third grade, with risings and fallings, and long life.
春吉,夏劳力,秋冬贵。子丑年月,贵至三品,有起有落,寿永。
Rabbit hour 05:00–07:00 · Yin Earth Rabbit (Ji Mao, 己卯)
born in a Tiger (寅) or Snake (巳) month with no Yang Metal (庚) or Yin Metal (辛) in sight, it is the day’s prosperity star returning at the hour (日禄归时) pattern — conspicuous, pure and noble. Pure Rabbit (卯) in year and month, a high monk or a feathered adept. Dog (戌), outstandingly clever, with money and the prosperity star (禄).
生寅巳月,不见庚辛,日禄归时格,显达清贵。纯卯年月,高僧羽士。戌,特达聪明,有财禄。日禄居时格不同,食神则马要相逢;伤官印运皆为吉,官不逢兮禄自丰。
Dragon hour 07:00–09:00 · Yang Metal Dragon (Geng Chen, 庚辰)
if not noble then wealthy. If Yin Water (癸) and Yang Earth (戊) in year or month make one transformation, and Monkey (申) and Rabbit (卯) are both strong, and Snake (巳), Ox (丑) and Rooster (酉) gather as Metal, running Wood and Earth periods, the position reaches gold and purple.
不贵则富。若年月癸戊一化,申卯两旺,巳丑酉会金,行木土运,位至金紫。乙庚相会贵无疑,阴木阳金正合时;运吉身强无冲破,升迁自有贵人提。
Snake hour 09:00–11:00 · Yin Metal Snake (Xin Si, 辛巳)
born in Snake (巳) or Horse (午) months, the Seven Killings (偏官) is held in check. Spring with strong stems, a position in the censorate. Autumn with the Killings (煞) heavy, it governs disability.
生巳午月,偏官有制。春干强,位居风宪。秋煞重,主残疾。乙巳相伤逢金木,求名求利常反复;六亲骨肉有如无,印绶运乡能发福。
Horse hour 11:00–13:00 · Yang Water Horse (Ren Wu, 壬午)
spring, the self strong; summer, the blessing thick; autumn, reversals; winter, favourable and glad.
春身旺,夏福厚,秋反复,冬吉庆。
Goat hour 13:00–15:00 · Yin Water Goat (Gui Wei, 癸未)
spring, the Wood strong, punishment and injury to wife and children. A Monkey (申) month, the officer strong, noble. Rooster (酉), the Killings (煞) strong; with Fire in year or month, favourable. Horse (午), Goat (未) and Dog (戌) in year or month, first or second grade. Born in winter, settled and thick.
春木旺,刑伤妻子。申月官旺,贵。酉煞旺,年月有火则吉。午未戌年月,一二品贵。冬生稳厚。
Monkey hour 15:00–17:00 · Yang Wood Monkey (Jia Shen, 甲申)
the hour falls on the void (空亡)— it governs few children. Born in autumn, office among the six ministers. Pig (亥) and Rabbit (卯) in the year and Goat (未) in the month, all favourable.
时落空亡,主少子。秋生,官居六卿。亥卯年未月,俱吉。
Rooster hour 17:00–19:00 · Yin Wood Rooster (Yi You, 乙酉)
born in spring, the benevolence and long life (仁寿) pattern, noble. A Tiger (寅) month running Metal and Fire periods, greatly noble.
春生,仁寿格,贵。寅月,行金火运,大贵。日干是乙时临酉,假煞为权身旺奇;身弱遇官徒费力,功名须待运通时。
Dog hour 19:00–21:00 · Yang Fire Dog (Bing Xu, 丙戌)
blood complaints. Pig (亥), Rat (子), Rabbit (卯), Goat (未) and Tiger (寅) months, meeting the noble brings blessing; with Hurting Officer (伤官) showing at the stems producing wealth, better still.
血疾。亥子卯未寅月,遇贵发福;天干透伤官生财,尤吉。枯木相逢局,逢春叶更生;晚年方得地,花发再重荣。
Pig hour 21:00–23:00 · Yin Fire Pig (Ding Hai, 丁亥)
with wealth it self-punishes; Tiger (寅) and Rabbit (卯) make the self strong, and with wealth showing at the stems, rich. Dragon (辰) and Ox (丑) running Metal and Fire periods, noble. Pig (亥), Rat (子) and Monkey (申), officer and Resource (印) both clear, and helped by wealth besides — greatly noble.
有财自刑,寅卯身旺,天干透财者富;辰丑,行金火运,贵。亥子申,官印双清,更辅以财。大贵。时上生逢亥与丁,食神乙木遇长生;月气相扶为最贵,身衰无倚是常人。
The Pig and the other animals
When the day branch meets these — in a year, a ten-year luck period, or someone else’s chart — the classics read it by these relationships.
- Clashes with
- Snake
- Pairs with (six harmony)
- Tiger
- In a trine with
- Rabbit, Goat
- Punishment with
- Pig (itself)
- Harms
- Monkey
- Breaks
- Tiger
The next Yi Hai days: 28 October 2026, 27 December 2026, 25 February 2027. It returns every sixty days.
Famous people born on a Yi Hai day
- Lin Dan Badminton player · Olympic champion, 2008 and 2012
The Yin Wood day master · Before it: Jia Xu · After it: Bing Zi · All sixty day pillars