Born in 1990? Your Year Pillar is 庚午 — Yang Metal sitting on the Horse branch. The Year Pillar is the broadest layer of any BaZi chart: it sets the elemental backdrop for births under it, but it doesn’t determine your Day Master, your personality, or your fate. What it does — and how to read 庚午 alongside the rest of your chart — is what the rest of this page is for.
1990 BaZi summary: the year of 庚午 (Yang Metal Horse), position 7 of 60 in the sexagenary cycle. BaZi solar year began at 1990-02-04 10:13 CST (Sun at 315° ecliptic longitude, Li Chun 立春). Chinese Lunar New Year fell on January 27, 1990.
About the Year Pillar
The Year Pillar is one of the four pillars in your BaZi natal chart, alongside the Month, Day, and Hour pillars. Of the four it carries the broadest, most environmental flavour — you can think of it as the elemental climate of the era you were born into, rather than the weather of any individual day.
For 1990, that pillar is 庚午: the Heavenly Stem 庚 (Yang Metal) sitting over the Earthly Branch 午 (the Horse). Two questions follow naturally: what does 庚 contribute, and what does 午 contribute — and the same Year Pillar will read very differently depending on the Day Master it sits next to. The sections below walk through both pieces.
Heavenly Stem: Yang Metal (庚)
Yang Metal (庚) at the Year Pillar is the kind of metal forged into weapons and tools — rough, structural, demanding. The classical pairing is 庚金 with 丁火 (Yin Fire) and 甲木 (Yang Wood): the year reads productively when the chart has Fire to forge and Wood to fuel that Fire. Without them, 庚 sits as raw ore.
For a deeper reading of how Yang Metal functions when it appears as the Day Master itself, see the Yang Metal Day Master entry.
Earthly Branch: Horse (午)
The Earthly Branch 午 (the Horse) is mid-summer — the height of Fire and the peak of the year’s warmth. Its primary flavour is pure Yang Fire, with hidden stems 丁 (Yin Fire) and 己 (Yin Earth). At the Year Pillar, 午 produces a strongly outward, expressive year: visibility, momentum, and the risk of burnout.
The classical reading consideration is restraint: 午’s peak Fire needs Water to balance and Metal to forge. A chart without those elements at the right positions can find 午 destabilising rather than empowering.
Combinations & clashes for 午
In BaZi the twelve Earthly Branches form fixed pairings: every branch has exactly one combination partner (六合) and one clash partner (六沖). When a chart contains both members of a pair, the relationship transforms or destabilises that part of the chart. For year pillars, this matters most when reading 1990 against the Month, Day, or Hour Branches in someone’s chart.
How 1990’s Year Pillar reads against each Day Master
Your Year Pillar takes on a different meaning depending on what your Day Master is. Below is the Ten God relationship between 1990’s Year Stem (庚) and each of the ten possible Day Masters. Find your Day Master in the table to see what 庚 represents to you.
The Year Pillar tells you something about the elemental backdrop of your life, but it is not the centre of your chart. Your Day Master — the Heavenly Stem in your Day Pillar — is what most BaZi readings rotate around. Two people born in 1990 can have very different Day Masters and very different lives, even though they share the same Year Pillar. This is also why people born 60 years apart with the same Jiazi (e.g. 1990 and 1930) share elemental conditions but lead different lives shaped by different Day Pillars and different luck cycles.
The descriptions on this page are generic commentary on what 庚午 contributes at the year-pillar level. They are not a reading of any specific person’s chart. Practitioner-grade interpretation requires the four pillars together, the seasonal strength of the Day Master, the Ten Gods’ positioning, the auxiliary stars present, and the Luck Pillars currently active — all of which only emerge from a full chart cast against an individual birth date and time. There is no reading the Year Pillar in isolation that does justice to a real chart.
Important caveat on Li Chun: BaZi years run from Li Chun (立春), the precise astronomical moment when the Sun reaches ecliptic longitude 315°. For 1990 this falls at 1990-02-04 10:13 China Standard Time (UTC+8). Births before that exact moment are categorised under the previous BaZi year (1989 — 己巳). Always convert your local birth time to CST before interpreting a chart, especially if you were born within a few hours of Li Chun.
Frequently asked questions
What does it mean to be born in a Yang Metal Horse year?
It means your Year Pillar is 庚午 — one of the four pillars that make up your BaZi chart. The Year Pillar describes elemental backdrop, not personality. To read what 庚午 actually means for you specifically, you need to compute the full chart (Year, Month, Day, Hour pillars) and read the Year Pillar against your Day Master. Run your details through the BaZi Calculator for a starting point.
Is 1990 a good or unlucky year to be born in?
BaZi doesn’t classify years as universally lucky or unlucky — the same Year Pillar reads as helpful for some Day Masters and challenging for others. 庚午 provides Yang Metal energy at the year level; whether that’s welcome depends on whether your Day Master needs it, can use it, or is destabilised by it. The Ten God table above shows the relationship between 1990’s Year Stem and each of the ten Day Masters.
How is 1990 different from 1930 (also a 庚午 year)?
1990 and 1930 share the same Year Pillar (both 60 Jiazi cycles produce 庚午), so the Year Pillar reads identically. What differs is everything else: the Month, Day, and Hour pillars depend on individual birth date and time, the Luck Pillars rotate through different elemental phases, and the broader era’s context (社会大运) is different. Two people born under the same Jiazi but 60 years apart will share elemental conditions but live very different lives.
I was born in early 1990. Am I really a Horse?
BaZi years start at Li Chun (立春), which fell at 1990-02-04 10:13 CST in 1990. If you were born before that moment, your BaZi year is the previous one (1989 — 己巳). The Western calendar year matches the BaZi year only for births on or after Li Chun. Note: this differs from the lunar Chinese New Year date, which can fall earlier or later depending on the year.
Further reading from the blog
Selected posts from Master Sean Chan’s blog that cover this topic or closely related ones in practice:
1990 sets the Year Pillar of your chart, but the Day Master, Month Pillar, and Hour Pillar are what actually shape your reading. Book a one-on-one BaZi consultation with Master Sean Chan ($588–$788) for a rigorous, personalised analysis.
The BaZi Calculator takes your full birth details (solar-time corrected) and surfaces all four pillars — Year, Month, Day, and Hour — along with the Ten Gods and auxiliary stars derived from your Day Master.
The BaZi Bootcamp at Sean Chan’s Academy of Astrology takes you from beginner to confident chart reader — structured lessons, exercises, and live community.