Day spirit
Yù Táng
Jade Hall
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
玉堂猶言後宫也
Jade Hall amounts to saying the rear palace.
協紀辨方書 卷七
About this entry
Eighth on the list, 玉堂 begins at 未 in the first month and is one of the yellow-path six. 曹震圭, in 協紀辨方書 卷七, calls it the emperor's resting quarters and the empress's place, with 天玉 as another name.
The editors reach similar ground by another road. 卯 is the Bright Hall and is tied to the sun, so the opposite branch 酉, tied to the moon, makes a fitting rear palace. They also state that the words yellow and black here are only other terms for good and bad, with no deep meaning behind them.
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.