The Twelve Earthly Branches: meanings, hours and hidden stems

What are the Earthly Branches?

Each of the Four Pillars records a birth year, month, day or hour with a stem above a branch. The year branch corresponds to a zodiac animal. The month branch gives seasonal context, while the day and hour branches occupy other positions in the reading. All four take part.

In a Jia Zi day pillar, Jia is the Day Master and Zi is the day branch. These names serve different purposes: Jia supplies the personal reference point; Zi describes conditions in the position beneath it. A branch is not a second, self-contained personality type.

The twelve branches and their elements

Branch polarity (whether a symbol is classified as yin or yang) alternates between Yang and Yin. Earth appears four times, associated with the closing phase of each season. The table lists the primary hidden stem (an additional element symbol traditionally assigned inside a lower chart symbol) first; the remaining order does not assign fixed percentages.

Growth, expression, gathering and storage

Yin, Mao and Chen belong to the spring sequence: emergence, expansion and the conditions supporting growth. Si, Wu and Wei belong to summer: rising warmth, outward intensity and residual heat. Shen, You and Xu describe the autumn sequence of gathering, refinement and preservation. Hai, Zi and Chou describe winter’s withdrawal and accumulation.

These are traditional seasonal images. They can help frame a question about beginning, developing or conserving something, but cannot establish someone’s personality or future. The calendrical season is also distinct from the actual weather at a birth location.

What hours and months do branches represent?

Each double hour spans two conventional hours, with Zi crossing midnight. BaZi solar-term (one of 24 seasonal markers defined by the Sun’s position along its yearly path) months change at twelve particular solar terms, not on a fixed Gregorian date or every lunar new moon. The solstices fall within the Zi and Wu months rather than beginning them.

Why does one branch contain several stems?

Hidden stems describe a branch’s internal composition. Yin, for example, has Jia Wood as its primary stem alongside Bing Fire and Wu Earth. This helps explain why a branch can provide a root for a stem or carry several Ten Gods (traditional labels for relationships to the birth-day element) relationships.

The lists here follow the common hidden-stem song in Yuanhai Ziping. Classical accounts also allocate governing qi to portions of a month. That is a different reference and should not be used interchangeably with the hidden-stem list. Neither list is a directly measured elemental percentage.

What do combinations and clashes mean?

The six pairings are Zi–Chou, Yin–Hai, Mao–Xu, Chen–You, Si–Shen and Wu–Wei. The six clashes are Zi–Wu, Chou–Wei, Yin–Shen, Mao–You, Chen–Xu and Si–Hai. They describe connections or opposing relationships; interpretation also considers position, strength and the surrounding branches.

A combination does not establish transformation, and a clash does not establish misfortune. Comparing two zodiac animals cannot settle a relationship, just as a yearly branch clashing with one birth branch cannot specify a future event.

Which part matters for my reading?

For an unfamiliar name, use the table and its individual branch page. For a discussion of strength, look for the month branch’s season and the hidden stems. For a day-branch or annual interaction, ask which position is affected and what it interacts with.

Knowing this vocabulary lets you ask how an interpretation was reached. A useful reading should identify the position and conditions behind its explanation, then offer questions you can compare with your experience. The terminology should help you understand your choices.

Continue reading

• How stems work with branches

  Distinguish the personal reference from its conditions.

• Why hidden stems have Ten Gods roles

  Understand relationships defined relative to the Day Master.

All topics in this category

• Zi Water in BaZi: midnight, hidden Gui and the Zi–Wu clash
• Chou Earth in BaZi: cold storage, hidden stems and Chou–Wei
• Yin Wood branch in BaZi: early spring, hidden stems and Yin–Shen
• Mao Wood in BaZi: spring growth, hidden Yi and Mao–You
• Chen Earth in BaZi: damp Earth, Water storage and Chen–Xu
• Si Fire in BaZi: early summer, hidden Bing and Si–Hai
• Wu Horse branch in BaZi: Fire, hidden Ding and the Zi–Wu clash
• Wei Earth in BaZi: late-summer warmth, Wood storage and Chou–Wei
• Shen Metal in BaZi: early autumn, hidden Ren and Yin–Shen
• You Metal in BaZi: refinement, hidden Xin and Mao–You
• Xu Earth in BaZi: dry Earth, Fire storage and Chen–Xu
• Hai Water in BaZi: early winter, hidden Jia and Si–Hai
• Earthly Branch directions: north, east, south and west
• Hidden stems in Earthly Branches: the complete table and meaning
• BaZi tombs and storehouses: Chen, Xu, Chou and Wei explained
• Earthly Branch combinations and clashes: complete lookup and reading
• BaZi punishments, harms and breaks: the branch tables explained
• Earthly Branches in luck pillars and annual cycles: what changes?

References

• Sanming Tonghui, volume 2: branches, seasonal terms and interactions
• Di Tian Sui Chan Wei, Earthly Branches: polarity, primary qi and context
• Yuanhai Ziping, Song of Hidden Stems: the stem lists used here
• Hong Kong Observatory: stems, branches and double-hour correspondence

Explore your own Reading

Find the year, month, day and hour branches in your Reading, then use the Day Master to understand their roles. The tool and reports are currently in English.