Sexagenary cycle · position 24 of 60
丁亥
Yin Fire Pig
This is one fixed meeting of a Heavenly Stem and an Earthly Branch. The stem supplies yin Fire; the branch supplies the Pig and its twelve-position time coordinate.
Two coordinates, read together
What is fixed inside 丁亥
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
Earth on the roof
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.
屋上土
- English association
- Earth on the roof
- Associated phase
- 土 Earth
- Shares this Na Yin
- 丙戌 Yang Fire 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 丁 Ding as the reference stem.
- 01
壬
Primary interior stem
正官 Direct Officer - 02
甲
Middle interior stem
正印 Direct Resource
One address in the sixty-position sequence
Where 丁亥 returns
The pair is position 24. 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
- 24 / 60
- Ten-position decade · 旬
- 甲申
- Stem stage at this branch
- 胎 Conception
Annual returns in the supported range
Every occurrence from 1901 through 2099 is shown.
- 1947丁亥
- 2007丁亥
- 2067丁亥
A coordinate, not a complete reading
What this pillar establishes
丁亥 fixes one stem–branch identity. A chart supplies the placement and comparisons that make that identity usable.
The pair fixes
- Yin Fire through 丁
- The Pig branch and its time coordinates
- 屋上土 Earth on the roof as its Na Yin
- Position 24 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 →