Sexagenary cycle · position 12 of 60
乙亥
Yin Wood Pig
This is one fixed meeting of a Heavenly Stem and an Earthly Branch. The stem supplies yin Wood; the branch supplies the Pig and its twelve-position time coordinate.
Two coordinates, read together
What is fixed inside 乙亥
A pillar keeps the same stem and branch wherever it is used. What changes is its placement—as a year, month, day or hour—and the other pillars it is compared with.
A separate traditional association · 纳音
Mountain-top fire
Na Yin assigns one named image and phase to every pair of consecutive cycle pillars. It sits beside the visible stem and branch coordinates; it does not replace either one.
山头火
- English association
- Mountain-top fire
- Associated phase
- 火 Fire
- Shares this Na Yin
- 甲戌 Yang Wood Dog
The fixed branch register
The 亥 Hai coordinate
The same branch names an animal, a double hour, a solar-term month and a compass sector. Those coordinates remain attached to 亥in every pillar that contains it.
- Animal
- Pig
- Branch polarity
- Yin
- Double hour
- 21:00–22:59
- Month opens at
- 立冬 Start of Winter
- Direction
- North-northwest
Inside this branch · 藏干
Hidden stems carried by 亥
The relationship name below compares each interior stem with 乙 Yi as the reference stem.
- 01
壬
Primary interior stem
正印 Direct Resource - 02
甲
Middle interior stem
劫财 Rob Wealth
One address in the sixty-position sequence
Where 乙亥 returns
The pair is position 12. Its annual appearances repeat every sixty years; the same pillar can also occur at the month, day or hour scale under those cycles' own rules.
- Cycle position
- 12 / 60
- Ten-position decade · 旬
- 甲戌
- Stem stage at this branch
- 死 Death
Annual returns in the supported range
Every occurrence from 1901 through 2099 is shown.
- 1935乙亥
- 1995乙亥
- 2055乙亥
A coordinate, not a complete reading
What this pillar establishes
乙亥 fixes one stem–branch identity. A chart supplies the placement and comparisons that make that identity usable.
The pair fixes
- Yin Wood through 乙
- The Pig branch and its time coordinates
- 山头火 Mountain-top fire as its Na Yin
- Position 12 in the repeating sequence
The chart still decides
Whether the pair is the year, month, day or hour pillar; which stem is the Day Master; and how the surrounding stems and branches relate to it. The pair alone does not rank a personality, promise an outcome or stand in for the other three pillars.
See how four pillars form a chart →