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
In the classical texts
Passages in the classical texts held on this site where the term occurs, transcribed from the named edition. The texts do not necessarily use the term the way it is used today.
日上起时法定寅时法通玄赋
起六神法五虎遁法五鼠遁法
二十五、日上起时歌
入门起例、六甲纳音属、天干、地支、方位、卦宫、年上起月、日上起时、宫分所属、度数所属、度数所在、太阳行度、太阴行度、晨昏度论、星曜行度、安命度法、十二宫例、定限度法、年分诀、行度诀、定小限例、定童限例歌、入门看法、洪蒙未判图说、太极巳判
日上起时子丑寅夘辰巳午未申酉戌亥
卷一：九宫八卦图、野马跳涧图、一卦统三图、六甲三元定例、阳遁九局起例歌、阴遁九局起例歌、五虎遁、五鼠遁、九宫八卦五行、九星五行、九神五行、六仪三奇五行、八门五行、干支化合五行、贵人方、日禄方、旬空方、喜神方、诸事吉方、建除十二神黄黑道诀。
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