Heavenly Stems and Earthly Branches: The 60-Year Chinese Zodiac Cycle Explained

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Stems & Branches · 天干地支

Heavenly Stems and Earthly Branches: The 60-Year Chinese Zodiac Cycle

Heavenly Stems and Earthly Branches are the traditional 10-and-12 cycle behind Chinese zodiac year names such as Wood Dragon, Fire Horse, Earth Ox, Metal Dog, and Water Rabbit.

If the 12 animal signs are the visible layer of the zodiac, the Stems and Branches are the calendar structure underneath them.

Heavenly Stems and Earthly Branches quick answer

The Heavenly Stems, or 天干 tiāngān, form a cycle of 10. The Earthly Branches, or 地支 dìzhī, form a cycle of 12. When they are paired in order, they create the 60-year cycle used for traditional Chinese year labels.

Simple formula:
Heavenly Stem gives the element layer. Earthly Branch gives the animal-sign layer. Together they form names such as Bǐngwǔ 丙午, commonly read as Fire Horse.

The 10 Heavenly Stems

The 10 Heavenly Stems are linked with the Five Elements and yin-yang polarity. Each element appears twice: once in a yang form and once in a yin form.

Order Stem Pinyin Element Yin / Yang Common English reading
1甲jiǎWoodYangYang Wood
2乙yǐWoodYinYin Wood
3丙bǐngFireYangYang Fire
4丁dīngFireYinYin Fire
5戊wùEarthYangYang Earth
6己jǐEarthYinYin Earth
7庚gēngMetalYangYang Metal
8辛xīnMetalYinYin Metal
9壬rénWaterYangYang Water
10癸guǐWaterYinYin Water

The 12 Earthly Branches and zodiac animals

The 12 Earthly Branches are paired with the 12 Chinese zodiac animals. This is the branch-animal layer most readers recognize as Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, and Pig.

Order Branch Pinyin Animal Chinese pairing Sign page
1子zǐRat子鼠Rat
2丑chǒuOx丑牛Ox
3寅yínTiger寅虎Tiger
4卯mǎoRabbit卯兔Rabbit
5辰chénDragon辰龙Dragon
6巳sìSnake巳蛇Snake
7午wǔHorse午马Horse
8未wèiGoat未羊Goat
9申shēnMonkey申猴Monkey
10酉yǒuRooster酉鸡Rooster
11戌xūDog戌狗Dog
12亥hàiPig亥猪Pig
Translation note:
The sign 羊 yáng may be translated as Goat, Sheep, or Ram. The Zodiac Lore uses Goat for consistency.

How the 60-year cycle works

The 10 Heavenly Stems and 12 Earthly Branches move forward together, one step at a time. Because 10 and 12 meet again after 60 steps, the full cycle takes 60 years.

This is why a Chinese zodiac year is not only “Dragon” or “Horse.” It can be Wood Dragon, Fire Horse, Earth Ox, Metal Dog, or Water Rabbit, depending on the stem-branch pairing.

Stem Element layer

The Heavenly Stem gives the element and yin-yang quality.

Branch Animal layer

The Earthly Branch gives the zodiac animal sign.

Pairing Full year label

The stem and branch together create the 60-year cycle name.

For a dedicated table of the full cycle, see 60-Year Chinese Zodiac Cycle.

Examples: how year names are built

A year label becomes easier to read when you separate the stem and the branch. The stem gives the element; the branch gives the animal.

Gregorian year Stem-branch Stem meaning Branch animal Common year label Year guide
2024甲辰 jiǎchénYang WoodDragonWood Dragon2024 Chinese Zodiac
2025乙巳 yǐsìYin WoodSnakeWood Snake2025 Chinese Zodiac
2026丙午 bǐngwǔYang FireHorseFire Horse2026 Chinese Zodiac
2031辛亥 xīnhàiYin MetalPigMetal Pig2031 Chinese Zodiac

Animal sign page vs year page

A zodiac animal page and a zodiac year page are related, but they are not the same thing. A sign page explains the animal symbol across many years. A year page explains one specific animal + element year.

Page type Example What it explains
Animal sign page Horse Chinese Zodiac The Horse sign in general: symbolism, years, traits, compatibility, and cultural notes.
Specific year page 2026 Chinese Zodiac The 2026 Fire Horse year specifically, including its element and year boundary.
Year chart page Chinese Zodiac Years Chart A quick lookup table for birth years, animals, and elements.

Stems and Branches are not only for years

The stem-branch system can also be used for months, days, and hours in traditional timekeeping. This is why you may see Chinese zodiac animals connected with hours of the day as well as years of birth.

Years Most familiar

Birth-year zodiac signs use animal + element year labels.

Months and days Traditional calendars

Stems and branches can be used beyond annual zodiac labels.

Hours 12 double-hours

Each branch also corresponds to a traditional two-hour period.

For the hour system, read Chinese Zodiac Hours or use the Chinese Zodiac Hour Calculator.

Common misunderstandings

  • Thinking the zodiac is only 12 animals. The animal signs are the visible layer, but the 60-year cycle adds stems and elements.
  • Confusing element with animal. Horse is the animal; Fire is the element in a Fire Horse year.
  • Ignoring yin and yang. Each element appears in both yang and yin stem forms.
  • Using January 1 as the zodiac boundary. Birth-year zodiac lookup usually needs the Chinese New Year boundary.
  • Treating symbolic readings as science. Stems, branches, elements, and animal signs belong to cultural calendar tradition.

FAQ

What are Heavenly Stems and Earthly Branches?

They are traditional Chinese cycles of 10 and 12 that combine to form the 60-year cycle used in Chinese calendar naming.

How do Heavenly Stems relate to elements?

The Heavenly Stems carry the Five Elements: Wood, Fire, Earth, Metal, and Water, each appearing in yang and yin form.

How do Earthly Branches relate to zodiac animals?

Each Earthly Branch is paired with one of the 12 zodiac animals, such as 子 with Rat and 午 with Horse.

Why is the cycle 60 years?

The 10-stem cycle and 12-branch cycle line up again after 60 steps, creating the 60-year cycle.

What is 2026 in Heavenly Stems and Earthly Branches?

2026 is 丙午, bǐngwǔ, commonly read as the Fire Horse year after Chinese New Year begins.

Are Stems and Branches used only for birth years?

No. They can also be used for months, days, and hours in traditional Chinese timekeeping.

Next steps

Chinese Zodiac Elements Understand Wood, Fire, Earth, Metal, and Water. Read elements → 60-Year Cycle See how animal and element labels repeat. Read cycle → Element Combinations Compare animal + element meanings. Read combinations → Years Chart Look up animal and element by year. Open chart → 12 Zodiac Signs Learn the animal signs. Read signs → How We Calculate See the birth-date calculation method. Read method →

Editorial note

This page explains Heavenly Stems and Earthly Branches as a calendar and cultural framework. It focuses on the structure behind Chinese zodiac year labels, not on making scientific personality claims.

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