Double hour 12 of 12 · 時支
The Pig hour
亥 Hai holds 21:00–22:59 on the modern civil clock. Tradition fitted the pig to it as the hour pigs sleep most soundly, when the house has gone quiet.
One branch · four linked coordinates
What stays fixed in the Pig 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.
- Hour branch亥 Hai
21:00–22:59
- Month opens立冬 Lìdōng
Start of Winter
- DirectionNorth-northwest
Branch sector 12 of 12
- Fixed phaseWater
Phase carried by the branch
五鼠遁 · day stem sets hour stem
Five complete Pig 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乙亥Yin Wood Pig
- 02 · on 乙 Yi / 庚 Geng days丁亥Yin Fire Pig
- 03 · on 丙 Bing / 辛 Xin days己亥Yin Earth Pig
- 04 · on 丁 Ding / 壬 Ren days辛亥Yin Metal Pig
- 05 · on 戊 Wu / 癸 Gui days癸亥Yin Water Pig
Two clock edges
The Pig hour changes at 21:00 and after 22:59
A time earlier than 21:00 belongs to the preceding branch; a time after 22:59 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 Pig branch clashes with Snake, forms Six Harmony with Tiger, and belongs to the Wood trine with Pig and Rabbit and Goat. These relationships come from fixed positions.