2031 — Year of the Pig 豬 辛亥
2031 is the year of the Pig 豬 — year pillar 辛亥, Yin Metal. Every date on this page is computed by the same astronomical kernel that powers our public API, to the minute.
Lichun 2031-02-04 08:58:13 · CNY 2031-01-23 · engine 0.1.0
| Field | Value (kernel-computed) |
|---|---|
| Year pillar 年柱 (Lichun rule) | 辛亥 辛亥 |
| Zodiac 生肖 | Pig 豬 |
| Element (heavenly stem) | Yin Metal |
| Exact Lichun instant 立春 | 2031-02-04 08:58:13 Beijing |
| Chinese New Year 正月初一 | 2031-01-23 |
| Lunar months in the year | 13（leap month: month 3 閏3月） |
| Lunar year length | 384.079 days |
The two-calendar window in 2031
In 2031, Chinese New Year 正月初一 falls first (2031-01-23) and Lichun 立春 12 days later (2031-02-04). Anyone born inside that 12-day window gets a different zodiac animal and year pillar depending on which convention their tool follows — BaZi practice switches at the exact Lichun instant (2031-02-04 08:58:13, Beijing), folk calendar practice at the new moon. This is not an edge case we gloss over — it is the single most common source of wrong zodiac years, and our engine comparison tool shows it live with three engines side by side.
Your Kua number for 2031
Born inside 2031 (after Lichun)? Your Ming Gua: male (2000 − 2031) mod 9 = 5 → Kun 坤 · female (2031 − 2000 + 6) mod 9 = 1 → Kan 坎（five yellow substituted per convention）. Born before Lichun? The formula runs on 2030 — the Kua calculator applies the boundary for your exact birthday.
FAQ
When does the year of the Pig (辛亥) start and end?
By the exact Lichun instant: from 2031-02-04 08:58:13 Beijing to the Lichun of 2032. By the lunar calendar: from Chinese New Year (2031-01-23) to the next new-year new moon. The two definitions disagree about 12 days of 2031 — see the window note above.
Is 2031 a leap month year?
Yes — the lunar year 2031 has 13 months with a leap month 3 閏3月, computed by the GB/T 33661-2017 rules (no-zhongqi method, with the 2033-type edge cases handled).
What is my Kua number if I was born in 2031?
For births after Lichun: male 5 (坤), female 1 (坎). Births before the exact Lichun instant belong to 2030 and use that year in the formula — most online calculators get early-February birthdays wrong here.
Tools for this year
All 24 solar terms of 2031 · Almanac for Chinese New Year (2031-01-23) · Kua number calculator · Four-pillar chart · All Pig years