Chinese Zodiac Calculator

Overview

The Chinese zodiac animal follows from the birth year in a twelve-year cycle — but the year begins at Lunar New Year, not 1 January, which is where most quick lookups go wrong. This page documents the method including that boundary.

• The twelve animals cycle by year, and the year begins at Lunar New Year.
• Births in January and early February usually belong to the previous animal year.
• The full traditional cycle is sixty years, combining twelve branches with ten stems.
• Some traditions use the solar term Lichun rather than Lunar New Year as the boundary.

The method

• Determine which zodiac year the birth date falls in, using Lunar New Year — not 1 January — as the boundary.
• The twelve animals cycle in fixed order: rat, ox, tiger, rabbit, dragon, snake, horse, goat, monkey, rooster, dog, pig.
• The heavenly stem for the year gives the associated phase — wood, fire, earth, metal, water — in a yang or yin form.
• Stem and branch together identify the year within the sixty-year sexagenary cycle, which is the complete traditional designation.

The Lunar New Year boundary

Lunar New Year falls between about 21 January and 20 February, on a date set by the lunisolar calendar — specifically, the second new Moon after the winter solstice in the usual reckoning. It therefore moves substantially from year to year.

Anyone born in January or the first part of February belongs to the animal year that began the previous winter, not the one starting later that same calendar year. This single fact accounts for most incorrect answers from casual online lookups, which frequently apply a simple year-modulo calculation.

The competing Lichun convention

Some traditions, particularly within Four Pillars of Destiny practice, begin the zodiac year at the solar term Lichun rather than at Lunar New Year. Lichun falls around 4 February each year, when the Sun reaches 315 degrees of ecliptic longitude.

The two conventions usually agree but can differ for births in the window between them, which in some years spans a couple of weeks. This is a genuine divergence between traditions rather than an error, and any tool that does not state which convention it uses is understating the ambiguity.

Why sixty and not twelve

The twelve earthly branches pair with ten heavenly stems. Because both cycles advance one step per year and 12 and 10 share a factor of 2, only sixty of the 120 possible pairings occur, and the pattern repeats every sixty years.

This is why a year is properly described as, for instance, a wood dragon year, and why a sixtieth birthday carries particular significance in several East Asian cultures: it marks a complete return to the stem-branch combination of one's birth.

Continue in the data

Catalogues, hubs, and reference pages that hold the underlying records for this topic.

• Chinese zodiacThe cultural tradition in full.
• Reference systemsLunisolar calendars and solar terms.
• Ancient civilizationsChinese calendrical astronomy.

Frequently asked

How do I find my Chinese zodiac animal?

From the birth year, using the twelve-year animal cycle — but with the year beginning at Lunar New Year rather than 1 January. A birth in January or early February usually belongs to the previous animal year, so the exact Lunar New Year date for that year must be checked before applying the cycle.

Why do some sources give me a different animal?

Almost always because of the year boundary. A simple year-modulo lookup that assumes 1 January gives the wrong answer for anyone born in January or early February. A second, smaller source of disagreement is that some traditions use the solar term Lichun, around 4 February, rather than Lunar New Year.

Why is the cycle described as sixty years?

Because the twelve earthly branches combine with ten heavenly stems, and since both advance one step per year, only sixty of the possible pairings occur before the pattern repeats. A specific stem-branch combination — a wood dragon year, for example — therefore recurs only every sixty years, even though the animal alone returns every twelve.