Double hour 10 of 12 · 時支
The Rooster hour
酉 You holds 17:00–18:59 on the modern civil clock. Tradition fitted the rooster to it as the hour hens come home to roost as the light goes.
One branch · four linked coordinates
What stays fixed in the Rooster period
The clock selects one Earthly Branch. The same branch also carries a phase, compass direction and solar-term month; those links are structural coordinates, not extra personality labels.
五鼠遁 · day stem sets hour stem
Five complete Rooster hour pillars are possible
The branch is fixed by the clock. The stem advances from the Day Master, so the ten day stems fall into five rule pairs and produce five possible hour pillars here.
- 01 · on 甲 Jia / 己 Ji days癸酉Yin Water Rooster
- 02 · on 乙 Yi / 庚 Geng days乙酉Yin Wood Rooster
- 03 · on 丙 Bing / 辛 Xin days丁酉Yin Fire Rooster
- 04 · on 丁 Ding / 壬 Ren days己酉Yin Earth Rooster
- 05 · on 戊 Wu / 癸 Gui days辛酉Yin Metal Rooster
Two clock edges
The Rooster hour changes at 17:00 and after 18:59
A time earlier than 17:00 belongs to the preceding branch; a time after 18:59 belongs to the next. This site reads the local civil time entered and does not silently apply longitude, daylight-saving or apparent-solar-time corrections.
Known time
A recorded local time selects this branch and allows the hour stem to be derived from the day stem.
Unknown time
The hour pillar stays absent. Assuming noon or another default would invent two of the chart’s eight characters.
The same branch geometry at every scale
Its clash, harmony and trine do not change with the clock
The Rooster branch clashes with Rabbit, forms Six Harmony with Dragon, and belongs to the Metal trine with Snake and Rooster and Ox. These relationships come from fixed positions.