Yi Si (乙巳): the Yin Wood Snake, pillar 42 of 60
Last checked · images quoted from the San Ming Tong Hui on Chinese Wikisource; dates calculated
Compiled by the Fengshui Zen editors · About and method
乙巳 is pillar 42 of the sixty: the yin wood stem 乙 Yi over the Snake branch 巳 Si. The last 乙巳 year was 2025 and the next is 2085; the next 乙巳 day is Nov 27, 2026. The San Ming Tong Hui gives it the image of lamplight, and it shares the Na Yin Lamp Fire (覆灯火) with 甲辰.
Stem
乙 Yi · Yin Wood
Branch
巳 Si · Snake · Fire
Na Yin
覆灯火 Lamp Fire
Void branches
寅卯 (Tiger, Rabbit)
乙巳 in the San Ming Tong Hui (三命通會)
By Wan Minying (Ming dynasty), chapter one, quoted from Chinese Wikisource; translations are ours.
Image, from the list of the sixty pillars
乙巳……灯光也
乙巳: lamplight.
Why its Na Yin is called 覆灯火, from 「论纳音取象」
气形盛地，势定高冈，传明继晦，子母相承
Its qi and form stand in a place of fullness, set firmly on high ground; it hands its light on through the dark, passed from mother to child.
Its Na Yin against the facing one, 山头火 (甲戌 and 乙亥)
覆灯山头，含光畏风，投光止艮也
Covered Lamp and Mountaintop: light held in and afraid of the wind, against light cast out and coming to rest in Gen.
The likes, dislikes and star names that follow in the book are not reproduced. Read 三命通會 卷一 on Wikisource.
Inside the 乙巳 pillar
| Hidden stem in 巳 | Element | Ten God from 乙 |
|---|---|---|
| 丙 Bing (main) | Yang Fire | Hurting Officer 伤官 |
| 戊 Wu | Yang Earth | Direct Wealth 正财 |
| 庚 Geng | Yang Metal | Direct Officer 正官 |
| Branch element against the stem | Fire 火: an element the stem produces (Wood) |
|---|---|
| Root of the stem | Yi has no root in 巳: none of its hidden stems is Wood |
| Twelve stages | Yi is in 沐浴 Bath on 巳 |
| Ten-day group (旬) | starts with 甲辰; void branches 寅 Yin, 卯 Mao |
| As an hour pillar | the Snake hour, 09:00-11:00, on 丁 and 壬 days |
How 巳 Si relates to the other branches
| Six Harmony (六合) | 申 Shen (Monkey), associated with Water |
|---|---|
| Clash (六冲) | 亥 Hai (Pig) |
| Harm (六害) | 寅 Yin (Tiger) |
| Punishment (刑) | 寅 Yin, 申 Shen |
| Three Harmony (三合) | 巳酉丑: the Metal frame |
| Seasonal group (方合) | 巳午未: South, Summer, Fire |
乙 Yi against each Day Master
| Day Master | 乙 is its | Chinese |
|---|---|---|
| 甲 Jia Wood | Rob Wealth | 劫财 Jie Cai |
| 乙 Yi Wood | Friend | 比肩 Bi Jian |
| 丙 Bing Fire | Direct Resource | 正印 Zheng Yin |
| 丁 Ding Fire | Indirect Resource | 偏印 Pian Yin |
| 戊 Wu Earth | Direct Officer | 正官 Zheng Guan |
| 己 Ji Earth | Seven Killings | 七杀 Qi Sha |
| 庚 Geng Metal | Direct Wealth | 正财 Zheng Cai |
| 辛 Xin Metal | Indirect Wealth | 偏财 Pian Cai |
| 壬 Ren Water | Hurting Officer | 伤官 Shang Guan |
| 癸 Gui Water | Eating God | 食神 Shi Shen |
乙巳 years, 1900 to 2100
Next 乙巳 months and days
China Standard Time; a month runs from one jie solar term to the next.
Months
- May 6, 2027 to Jun 6, 2027
- May 5, 2032 to Jun 5, 2032
Days
- Nov 27, 2026
- Jan 26, 2027
- Mar 27, 2027
- May 26, 2027
- Jul 25, 2027
- Sep 23, 2027
FAQ
Is 乙巳 a good or bad pillar?
Not on its own; that depends on the whole chart, which this site does not read. Structurally, Yi has no root in 巳, which clashes with 亥 and combines with 申.
What is the Na Yin of Yi Si?
Lamp Fire (覆灯火), which Yi Si shares with 甲辰 Jia Chen; the Na Yin names go in pairs, 30 for the 60 pillars. The San Ming Tong Hui explains how the name was chosen in its 论纳音取象 section, quoted above.
Which years are Yi Si (乙巳) years?
Between 1900 and 2100: 1905, 1965, 2025, 2085. Each starts at Lichun, around February 4, not on January 1. Under the Chinese New Year rule the same years are the Year of the Yin Wood Snake.
Neighboring and related pillars
Quotations keep the script of the source. Not a reading, a prediction or advice.