Day spirit
Bái Hǔ
White Tiger
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
參為白虎在申故以白虎名申
The mansion 參 is the White Tiger and lies at 申, so 申 is named White Tiger.
協紀辨方書 卷七
About this entry
白虎 is seventh and a black-path spirit, and its first-month branch is 午. Fierce as the animal sounds, this is one entry on a rotating list, and the days it touches are counted by the same arithmetic as the rest. 曹震圭, quoted in 協紀辨方書 卷七, casts it as a general and calls it 天棒, the emperor's vanguard, and 天馬, the emperor's mount.
The 1741 editors tie the name to the stars. 參 belongs to the western group called White Tiger and corresponds to the 申 branch, so they fix the spirit there. The 白虎 that 選擇宗鏡 pairs with the officer 成 is a different item. 星厯考原 卷五 gives the counting rule used here and no explanation of the name.
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.