The 2031 Chinese zodiac will be the Metal Pig (辛亥 Xīn Hài), a Yin Metal sign whose year sounds the Na Yin (纳音 nàyīn) note of Hairpin Metal (钗钏金). If you are planning ahead to a 2031 birth, the first fact to settle is when the Pig year actually opens. So treat this as a forward reference: the animal, the exact start date, and how the sign sits against the 2026 Horse. The most common mistake with any year is assuming 1 January or the lunar New Year opens it, when in fact a single early-February moment does, and that is where this page begins.
Born in January or early 2031? You may be a Metal Dog
The zodiac year begins at Li Chun (立春 lìchūn), the solar start of spring, not on 1 January and not at Chinese New Year. In 2031 Li Chun falls on 4 February at 08:57 (China Standard Time, matching Singapore). A baby born before that morning — and anyone born in January 2031 — will still belong to the previous pillar, the Metal Dog (庚戌), despite the calendar reading 2031. For a birth near the line, confirm the sign on the chart calculator.
An 08:57 handover puts the fine cases in the early morning: a 07:30 delivery on 4 February 2031 is a Dog, a 09:30 delivery a Pig. Everything from mid-morning to New Year’s Eve then runs uninterrupted under the 辛亥 pillar.
What the 2031 Chinese zodiac points to
Metal Pig natures tend to be generous, resilient and honest, with Yin Metal giving the Pig’s easy warmth a firmer, more discerning edge. It is a good-natured but capable signature, and only a sketch on its own. The full portrait of temperament and favourable elements sits on the Metal Pig year page.
Pig years across the decades
The Pig branch (亥) closes each twelve-year round, and the stem rotation means a different element every visit. The identical 辛亥 pillar last named the 1971 Metal Pig year; the Pigs between were the 1983 Water Pig, the 1995 Wood Pig, the 2007 Fire Pig and the 2019 Earth Pig. What every Pig year shares — the branch’s deep Water, its open-handedness, its clash with the Snake — is drawn together on the Year of the Pig hub.
How the Metal Pig meets the 2026 Horse
Measured against the 2026 Fire Horse, the Pig forms no major clash or combination. The relationship is therefore judged by elements rather than a branch tie — the Water of the Pig set against the Fire of the Horse within the wider chart. A neutral branch is not a blank one; it simply directs the reading toward the element balance. The Horse year is read in full on the 2026 Fire Horse page.
How the pillar’s elements combine
Unpacked, the year pillar is Yin Metal (辛) over the Pig branch, which carries Water (亥). Metal producing Water is a generative pairing — the stem feeds the branch, giving the Metal Pig a clear, flowing quality beneath its easy warmth. The Na Yin sound recorded here, Hairpin Metal (钗钏金), keeps the Metal note present, but it is a classical texture rather than the element a practitioner weighs at the table.
The working reading depends on how that Metal and Water meet the Day Master, and whether the chart wants more or less of them. The ten-year luck pillars (大运 dàyùn) keep changing that need across a life. The five elements page shows the generating and controlling cycles, and the luck pillars page covers how the decades turn.
The Pig as one character in eight
Once 08:57 passes, two of a chart’s eight characters are set: the year stem 辛 and the year branch 亥 — and the animal everyone celebrates is only that branch, one character of the eight. Classical reading assigns the year pillar to origins, grandparents and the family scene; the six characters of the month, day and hour, unknowable before the actual birth, do most of the describing. The month will set the season the Day Master is weighed against, the day will name the person, and the hour will finish the frame — which is why practitioners treat “a Pig baby” as the opening line of a chart, never its conclusion. Our what is my Chinese zodiac guide explains the year-branch check in detail, and the calculator assembles the full eight when the data exists.
Questions ahead of the 2031 boundary
A baby due on 4 February 2031 — Pig or Dog?
Genuinely undecided until the clock answers. Before 08:57 that morning the child is a Metal Dog; from 08:57 a Metal Pig. Few due dates sit so squarely on a pillar boundary, so record the delivery time carefully.
Does a mid-February 2031 birth need checking?
No. By then the year has clearly turned and the child is a Metal Pig without further arithmetic. The boundary only ever complicates January and the first days of February.
Which time zone anchors the 08:57?
China Standard Time, UTC+8 — Singapore’s clock. Births recorded elsewhere are converted to that zone before comparing against the boundary; the calculator handles the conversion from the birthplace automatically.
Beyond the animal
The year sign is one branch of four pillars, roughly an eighth of a Ba Zi (八字 bāzì) chart. On its own it fixes nothing, which is why the Day Master and hidden stems carry the real weight. The What is Ba Zi hub lays out how the pillars assemble. A precise birth time matters as much as the year, since the hour pillar (时柱 shízhù) adds a branch nothing else supplies. When a 2031 birth arrives, plot the full chart free with the calculator.