BaZi · Glossary
Wu Shu Dun — Hour Stem from Day Stem
Deep Oracle Editorial Team · 2026-07-27 · 1 min read
The rule fixing the 子-hour stem from the day stem so the hour pillar can be built, named for the rat because 子 is the rat branch. Full lookup included.
Reference table
| Day stem | 子-hour stem |
|---|---|
| 甲 | 甲子 |
| 乙 | 丙子 |
| 丙 | 戊子 |
| 丁 | 庚子 |
| 戊 | 壬子 |
| 己 | 甲子 |
| 庚 | 丙子 |
| 辛 | 戊子 |
| 壬 | 庚子 |
| 癸 | 壬子 |
Related terms
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