Day spirit
Tiān Dé
Heavenly Virtue
An almanac describes traditional day-types. It cannot decide health, money, law, marriage or children. Burial, marriage and medical items on these pages are what a book states, never advice.
In the classical sources
能使坤之克有成則天德也
What enables Kun to bring things to completion is Heavenly Virtue.
協紀辨方書 卷七
About this entry
天德, sixth of the twelve, is a yellow-path spirit starting at 巳 in the first month. Readers of 協紀辨方書 meet this name twice, because the book also uses it for a separate favorable spirit tied to the three-branch groups.
The editors disliked that overlap and chose a different name for the yellow-path one, 寶光, after judging the older 天對 inelegant. 星厯考原 卷五 keeps 天德 and the calculator follows that spelling. The editors' own reasoning places it at the branch 未, where Kun completes the work of the year.
Where this text comes from
The Chinese follows the Wikisource typed text of the Siku copy, under its CC BY-SA terms. Statements about the calculator describe its own rules, and modern practice is labeled as modern.
The English here is our own plain wording. Lists keep the items of the source.