The twelve earthly branches12 termsBaZi · Four Pillars of Destiny

The twelve branches were divisions of time before they were anything else: two hours each, twelve to a day, twelve months to a year, twelve years to a cycle. 子 comes first and holds midnight to one, around the winter solstice — the darkest point of both the day and the year, and the moment a new cycle formally begins. In the tradition those are one fact: the darkest place is the hinge.

So 子's nature isn't gloom, it's beginning and depth. It belongs to water, sits due north, and carries the rat — all pointing at one image: moving before anyone else does, and moving quietly.

Where it appears in your pillars, that part of life tends to run inward and deep: not showy, accumulating first and being seen later. It's also the most misread of the twelve, because almost nothing it does shows up at the time.

丑 holds one to three in the morning and, in the year, the stretch around the greatest cold — winter at its coldest with spring still some way off. It belongs to earth, and it's the buffer between water and wood: water is too cold to feed wood directly, so it passes through earth first.

That middle position sets 丑's character: receiving and converting. It isn't fast and it isn't handsome. Its value is digesting what the last stretch left so the next one can grow. The ox fits exactly — endurance isn't for display, it's for getting through the part where nothing shows.

Where 丑 sits in a chart, that area takes time and tends to take shape quietly while you think nothing is happening. The tradition groups 丑, 辰, 未 and 戌 as the four storehouses, and storing means precisely that: it hasn't gone, it's been put away.

寅 holds three to five in the morning and, in the year, 立春 — the true start of the year in the Chinese calendar. BaZi doesn't change year at midnight on the first of January; it changes at 立春, which is to say at 寅. That tells you how load-bearing this branch is: it's the starting line of every cycle.

寅 is yang wood, imagined as a forest tree. Its character comes from that: ignition, outwardness, growing upward. It isn't good at maintaining and isn't good at detail. What it's good at is turning a thing that doesn't exist into one that does.

Where 寅 sits in a chart, that area arrives early, moves fast, and needs someone to take the baton. The tradition counts 寅 among the 驛馬, the travelling horses, tied to movement and changes of place — not restlessness, but a function that points outward.

卯 holds five to seven in the morning and, in the year, the spring equinox — day and night equal, the sun rising due east. It's yin wood, the counterpart to 寅's tree: 寅 is the trunk, 卯 is the branch and the vine.

That contrast is the whole of it: not height but spread. Its strategy isn't going through but round, up and into the gap. The tradition never rated that second-best, because after the typhoon it's the big tree that's down and the grass that remains.

Where 卯 sits in a chart, that area is reached through relationships, through softness and through time; pushing hard tends to spoil it. 卯 is also associated with the gate, meaning a way in and out — a good deal of what happens in this position is brought to you by someone else.

辰 holds seven to nine in the morning and, in the year, the rains at the end of spring. It's earth, and among the four storehouses it's the reservoir: spring's wood needs it to hold water so summer's fire has something to burn.

That storing function sets its character: containing and coordinating. It holds water, wood and earth at once, so it was never simple and is natively good at putting incompatible things in one place. The tradition gives 辰 the dragon, the only invented animal of the twelve — not a coincidence, since what 辰 handles hasn't taken shape yet.

Where 辰 sits in a chart, that area involves many parties and many variables, and you're usually the one holding it together. 辰 also carries 天羅, the heavenly net, which says that sometimes you're caught in a net you strung: whoever has the capacity is likeliest to accept too much.

巳 holds nine to eleven and, in the year, the start of summer, where fire takes over. It's yin fire: not the sun's general shining but something concentrated, aimed, burning precisely.

That sets its character: precision and containment. Its force isn't in size, it's in accuracy. The snake fits — it doesn't win on bulk but on timing and position, which is the same statement twice.

Where 巳 sits in a chart, that area runs on judgement rather than force, and you tend to be the one who sees clearly before moving. 巳 is also one of the travelling horses, grouped with 寅, 申 and 亥 — so it carries movement too, but movement with a purpose rather than movement to get away.

午 holds eleven to one, and in the year the summer solstice — the longest day, and the day the light starts shrinking. It's yang fire: the sun itself.

That 'peak is also the turn' position is the whole meaning. Its strength is real and the largest on the field; the decline is written into the same structure. So the tradition's attitude to 午 isn't suppression, it's keeping something back. The horse fits: a fast animal's problem is knowing when to stop.

Where 午 sits in a chart, that area is conspicuous, arrives hard, and needs you to arrange its own ending. 午 opposes 子 exactly, the sharpest pair among the twelve: brightest against darkest, outermost against innermost. Wherever you carry 午 is usually where you most need to learn to be quiet.

未 holds one to three in the afternoon and, in the year, the stretch after the greatest heat where things ease. It's earth, and among the four storehouses it's wood's: summer's fire has burned, and what remains of wood is kept here.

So 未's function is gathering and converting: taking that wave of intensity and turning it slowly into something usable. It isn't a trough, it's the necessary step — without it autumn has nothing to harvest. The goat is the personality version of the same function: receiving a lot, and needing longer to sort it.

Where 未 sits in a chart, that area needs time to ferment and spoils if you force a conclusion. 未 opposes 丑, and both are earth storehouses; the tension in that pair usually shows up as which side to keep — both are preservation, of different things.

申 holds three to five in the afternoon and, in the year, the start of autumn, where metal takes over and growing turns to gathering. It's yang metal: unworked ore, the axe, the blade.

So 申's action is severing and switching: separating what's mixed, replacing what isn't working. The tradition gives it the monkey, whose cleverness isn't frivolity but the personality version of the same function — seeing the structure means seeing where you can go round it.

Where 申 sits in a chart, that area needs method rather than force, and you tend to be the one for whom a different approach unlocks it. 申 is also a travelling horse, and it opposes 寅 exactly: one ignites, one gathers in. The tension in that pair usually shows up as whether to charge or to change tack.

酉 holds five to seven in the evening and, in the year, the autumn equinox — day and night equal again, and the harvest formally begun. It's yin metal: metal already worked — jewellery, the needle, the fine blade.

Its difference from 申 is precision rather than force: 申 splits, 酉 cuts exactly. So its nature is discrimination — what to keep, what to discard, what still needs work. The rooster fits, since it announces the hour: when it's time you say so, whether or not anyone wants to hear.

Where 酉 sits in a chart, that area runs on standards rather than momentum, and you tend to be the one who sees the gap. 酉 opposes 卯: spring's growing against autumn's gathering. The tension usually shows up as whether to keep growing or start bringing it in.

戌 holds seven to nine in the evening and, in the year, the stretch after the frosts, with autumn ending and everything going into store. It's earth, and among the four storehouses it's fire's: what remains of summer's burning is kept here.

So 戌's function is storing and guarding: the harvest is in, and now someone has to watch it. The dog fits, and its loyalty is the personality version of the function — seeing the risk first, because the position is staying alert while everyone else relaxes.

Where 戌 sits in a chart, that area needs you to see it through, and you tend to be the one who thought of the worst case first. 戌 carries 地網, the earthly net, opposite 辰's heavenly one: both say protection can become confinement, one arriving from above and one from below.

亥 holds nine to eleven at night, the last of the twelve, and in the year the start of winter, where water takes over and everything returns to being hidden. It's yang water: the great river, the sea.

As the end of the cycle, its function is return and absorption: everything that travelled dissolves here, and only then does it come round to 子 and begin again. So it carries both tolerance and ending, which isn't a contradiction — whoever can contain is who can close. The pig is the personality version of that position.

Where 亥 sits in a chart, that area is about release and endings, and you're usually better than most at accepting that something is simply over. 亥 is also a travelling horse and opposes 巳: summer's concentrated fire against winter's spread water. The tension usually shows up as whether to tighten or to let go.