The 1980s run from Geng-Shen to Ji-Si, and they contain the start of a sixty-year cycle: 1984 is Jia-Zi, the first pair in the sequence.
| Year | Branch | Animal | Stem | Element | Polarity |
|---|---|---|---|---|---|
| 1980 | 申 Shen | Monkey | 庚 Geng | Metal 金 | Yang |
| 1981 | 酉 You | Rooster | 辛 Xin | Metal 金 | Yin |
| 1982 | 戌 Xu | Dog | 壬 Ren | Water 水 | Yang |
| 1983 | 亥 Hai | Pig | 癸 Gui | Water 水 | Yin |
| 1984 | 子 Zi | Rat | 甲 Jia | Wood 木 | Yang |
| 1985 | 丑 Chou | Ox | 乙 Yi | Wood 木 | Yin |
| 1986 | 寅 Yin | Tiger | 丙 Bing | Fire 火 | Yang |
| 1987 | 卯 Mao | Rabbit | 丁 Ding | Fire 火 | Yin |
| 1988 | 辰 Chen | Dragon | 戊 Wu | Earth 土 | Yang |
| 1989 | 巳 Si | Snake | 己 Ji | Earth 土 | Yin |
Every decade contains one of each of the ten stems, so the element counts below are structural rather than distinctive — each of the five elements appears exactly twice across any complete ten-year span.
Jia-Zi falls on 1984. That matters because it is the first entry in the sixty-year stem-branch cycle, and the cycle most commonly cited in modern Chinese calendars begins there — which is why 1984 is frequently used as the reference point for calculating every other year pillar.
The decade's span runs Monkey, Rooster, Dog, Pig, Rat, Ox, Tiger, Rabbit, Dragon, Snake. The missing animals are the Horse and the Goat — so no one born 1980–1989 carries Wu or Wei as their year branch. This is the only decade with that particular gap among those listed here.
The midpoint is structurally interesting. Jia-Zi at 1984 is Yang Wood on the purest water branch, and it sits four positions into the decade, which means the 1980s hold the transition from the metal-driven opening to the wood-driven middle and the fire-inflected close.
Anyone born in 1984 has a Jia day master only if they were also born on a Jia day — the year stem and the day stem are independent. This is the most persistent confusion in Chinese astrology, and the decade table is a good place to see it clearly: your year stem is not your day master.
The year pillar is one of four. Enter a birth date to get all four pillars, the day master and the element balance.
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