The xu hour in bazi is the Dog hour (戌 Xū), 19:00–20:59 — dusk giving way to full evening, when the gate is closed, the lamp is lit and the dog settles down to guard the house through the coming night. In element terms 戌 is yang Earth, a “storage” branch that warehouses the day’s Fire. It is dry, warm Earth holding embers, and it carries the Dog’s reputation for loyalty and watchfulness.
The Dog hour (戌) and its time range
Xu is the eleventh Earthly Branch, the Earth that closes the Fire season. Where the noon Horse blazed, the Dog hour banks that heat and keeps it safe — the coals under the ash. This is the hour of guarding, remembering and holding faith with what matters after the day’s work is done.
The Dog hour pillar by day stem
The stem on 戌 comes from the day stem via the Five Rats rule (五鼠遁 wǔshǔdùn):
| Day stem | Dog hour pillar |
|---|---|
| 甲 Jiǎ | 甲戌 |
| 乙 Yǐ | 丙戌 |
| 丙 Bǐng | 戊戌 |
| 丁 Dīng | 庚戌 |
| 戊 Wù | 壬戌 |
| 己 Jǐ | 甲戌 |
| 庚 Gēng | 丙戌 |
| 辛 Xīn | 戊戌 |
| 壬 Rén | 庚戌 |
| 癸 Guǐ | 壬戌 |
What the watchman keeps: hidden stems of 戌
The Dog’s storeroom holds three hidden stems (藏干 cánggān): Wù 戊 (Yang Earth), Xīn 辛 (Yin Metal), Dīng 丁 (Yin Fire). Earth is the main qi (本气 běnqì); the Metal and Fire are the valuables locked inside — the blade on the wall and the ember in the stove. Read against a Day Master, each takes a ten god (十神 shíshén) role. For a Ren 壬 Day Master the Dog hour is a dense destination: 戊 is Seven Killings 七杀, 辛 is Direct Resource 正印 and 丁 is Direct Wealth 正财 — pressure, protection and profit stacked in the children and later-life palace, the signature of someone whose closing chapters are anything but idle. For a Bing 丙 Day Master the same branch relaxes: 戊 is Eating God 食神, 辛 is Direct Wealth 正财 and 丁 is Rob Wealth 劫财 — output that earns, with a sibling’s hand in the till. The complete inventory for all twelve branches is on the hidden stems table.
What being born in the Dog hour colours
The hour is the destination pillar — children, output, ambition and later life. Warm storage Earth at that destination reads as loyalty and principle: people whose later chapters are built on trust, duty and guarding what they value, and who often become the steady keeper others rely on. Because 戌 stores Fire, there is warmth and conviction banked inside the solid exterior. The Dog hour can be stubborn or over-guarded, slow to let new things past the gate. Whether that steadfastness reads as integrity or as rigidity depends on the balance of the whole chart.
Two branch relations matter when 戌 sits in the hour. If 辰 appears elsewhere in the chart, the two storehouses meet in the Six Clashes (六冲 liùchōng) — 辰↔戌 — and the vault can be shaken open, for better or worse. If 卯 appears, the Six Combinations (六合 liùhé) pairing 卯+戌 leans toward Fire, warming the whole destination. Neither is read alone; they are weighed with the season and the Day Master’s strength.
Clock time, solar time and the Dog boundary
The window given for the Dog hour, 19:00–20:59, is true solar time — pinned to the sun’s actual position rather than the number printed on a birth certificate. Two corrections can carry a birth across the edge of this hour. The first is longitude: a birth city rarely sits exactly on the meridian its time zone is set to, and in Singapore, where clocks run on UTC+8 while the island lies nearer 104°E, civil time can lead solar time by close to half an hour. The second is the equation of time, a seasonal wobble of up to about a quarter-hour in either direction.
Near either edge of the Dog hour those minutes are not cosmetic. They can move a chart into the hour before or after, and with it a different hour pillar and a different final reading. This is the quiet adjustment that separates a rough chart from an accurate one, and it is why a birth time known only to the nearest hour always deserves a second look before its hour pillar is trusted. If your recorded time sits within twenty minutes of 19:00 or 21:00, treat the neighbouring hour as a live possibility until the solar correction is done; the calculator linked below makes both corrections automatically.
Checking a Dog hour, or finding one that was never recorded
In a cast chart, confirm the hour pillar’s branch is 戌 and its stem matches your day stem’s row above — 戊戌 for a Bing or Xin day, 庚戌 for a Ding or Ren day. Evening births are often well remembered because the household was awake and settled: after dinner, during the evening news, before bed. If no time was recorded, use that texture. The three known pillars still deliver the Day Master, its seasonal strength and the luck cycles, so read those first; then let the candidate hours compete. The Dog hour’s neighbours frame it helpfully — the Rooster hour before it is precise, social sunset Metal, the Pig hour after it is deep evening Water — so the three destinations differ enough that a person’s actual later-life pattern usually picks its own chart. When two candidates both seem to fit, a practitioner reads timing events (children’s births, career turns) against each version’s luck pillars and keeps the one that keeps scoring.
Fixing your own Dog hour
The hour pillar is derived, not calendrical. To see 戌 among all sixty hour pillars, use the master hour stem table; the preceding Rooster hour page holds sunset, and the neighbouring Pig hour page carries dusk into deep night. For hour boundaries and the late-Zi (晚子時 wǎn zǐshí) convention, see the birth hour and hour pillar page. Or plot your chart free with the calculator and read your hour pillar to the minute.