The Tong Shu Chinese Almanac: How the 通勝 Grades a Day

Lineage: From the Imperial Almanac to the Household Copy

The Tong Shu did not begin as a folk object. Its authority descends from the imperial almanac, the calendar the throne itself published each year. Under the Qing this was the 時憲書 (shí xiàn shū, the 'book conforming to the seasons'), one branch of the broader tradition of the 黃曆 (huáng lì, the 'yellow calendar', so named because the imperial almanac was issued under the throne and bound in yellow covers, with folk tradition also linking the name to the Yellow Emperor). To hold the calendar was a mark of the mandate: the state fixed the days, and the days ordered the empire's work.

The decisive act of standardization came in 1739, when the compendium 協紀辨方書 (Xié Jì Biàn Fāng Shū, the 'Treatise on Harmonizing Times and Distinguishing Directions') was issued by imperial order under the Qianlong reign. Before it, date-selection schools disagreed, one master's auspicious day was another's taboo. The 協紀辨方書 gathered the competing methods, weighed them against the classical sources, and set out the rules explicitly, so that any pronouncement followed from stated procedure rather than a diviner's whim. Every reputable modern Tong Shu still traces its day-grading rules to this compendium.

This is the through-line worth holding: the household Tong Shu on the kitchen nail is a descendant of a state document. The cycles it prints, the Officers, the Mansions, the stem-branch pillars, are not invented per publisher. They are deterministic rotations anchored the same way in every honest almanac, which is exactly why two Tong Shu bought in different cities agree on what a given day holds.

The Anatomy of a Day Page

Open the almanac to any date and the day announces itself in layers. First is the day's 干支 (gān zhī), its stem-branch pillar, one of the sixty combinations in the classical cycle that turns without pause regardless of the Gregorian date. The stem-branch is the day's signature; from it every other cycle is derived. Beneath it sits the day's 建除 (jiàn chú) Day Officer, one of twelve, and one of the 二十八宿 (èr shí bā xiù), the 28 Mansions of the classical sky.

Then come the two lists that most readers turn to first: 宜 (yí), the activities the day is suitable for, and 忌 (jì), the activities to avoid. These are the practical face of the almanac, printed as short activity names, 嫁娶 (jià qǔ, marriage), 動土 (dòng tǔ, breaking ground), 開市 (kāi shì, opening a business), 出行 (chū xíng, travel), and so on. The 宜 and 忌 lists are not arbitrary; they are the recorded consequences of the day's Officer, Mansion, and stars taken together.

The page also carries the day's 沖 (chōng), its clash animal. Every day's earthly branch opposes one of the twelve zodiac animals, and a person born in the clashed animal is advised to step back from that day's major undertakings. Finally the page grades the day's 吉時 (jí shí), its favourable hours. The Chinese day is divided into twelve two-hour periods, each named for an earthly branch, and within an auspicious day certain hours carry cleaner stars than others. A day that is broadly favourable may still ask you to act in the 辰 (chén) hour rather than the 午 (wǔ).

The Day Officer and the 28 Mansions

The 建除 (jiàn chú) Day Officers are the almanac's oldest grading layer, a twelve-day cycle whose names read like a life in miniature: 建 (jiàn, establish), 除 (chú, remove), 滿 (mǎn, full), 平 (píng, level), 定 (dìng, settle), 執 (zhí, hold), 破 (pò, break), 危 (wēi, danger), 成 (chéng, complete), 收 (shōu, gather), 開 (kāi, open), 閉 (bì, close). Each Officer inclines the day toward a mode of action. A 成 (chéng) day favours completing and concluding; a 破 (pò) day, as its name warns, favours demolition and endings far more than beginnings. The classical sources treat the Officer as the day's dominant temperament.

Layered over the Officers are the 二十八宿 (èr shí bā xiù), the 28 Mansions, arcs of the celestial equator through which the moon travels. They rotate in a fixed seven-day rhythm, organized into the four directional groups of the 四象 (sì xiàng, the Four Symbols): the Azure Dragon of the east, the Black Tortoise of the north, the White Tiger of the west, and the Vermilion Bird of the south. Each Mansion carries its own register of suitable and unsuitable acts, refining the Officer's broad temperament into finer counsel.

In practice no single layer decides a day. In Wu Xing terms, the Officer sets the day's tone, the Mansion adjusts it, the clash animal excludes those it opposes, and the stem-branch pillar ties it back to the person asking. A 建 (jiàn) establish-day that also clashes your birth animal is not simply 'good', it is good in the abstract and wrong for you. Reading the Tong Shu means holding the layers together. This is a pattern, not a verdict.

How the Almanac Is Read in Practice

A household does not read the whole page; it reads the page against a question. Someone planning to break ground on a foundation scans the 宜 (yí) list for 動土 (dòng tǔ) and the 忌 (jì) list to be sure the act is not forbidden, then checks that the day does not 沖 (chōng) the head of the household's zodiac animal, then, if the hour matters, chooses among the day's 吉時 (jí shí). The almanac narrows a month of candidate days to a short list, and the short list is chosen by activity, not by luck in general.

This is where a personal chart enters. The Tong Shu grades the day for everyone alike; it cannot know whose wedding it is. The classical refinement, drawn from the Zi Ping (子平) Four Pillars method set out in 淵海子平 (Yuān Hǎi Zǐ Píng), is to weigh the almanac's day against the individual's own stem-branch pillars, so that a day favourable in the book is also favourable for this particular person. A day the almanac blesses may still clash a birth chart; the personal layer catches what the public page cannot.

The honest use of the almanac is modest and precise. It does not tell you that a marriage will last or a business will thrive. It tells you which days carry a pattern that supports the undertaking and which carry a pattern that resists it, and it lets you act with the grain of the day rather than against it. This is a pattern, not a verdict.

Reading the Almanac in Your Own Selection

The value of the Tong Shu is that it is public and checkable. Its cycles are deterministic, so a date's day pillar, Day Officer, and 28 Mansion can be confirmed against any published almanac. This is the standard a CrystalStones.com date selection holds itself to. Every recommended date prints its own 干支 (gān zhī) stem-branch pillar, its 建除 (jiàn chú) Day Officer, its 二十八宿 (èr shí bā xiù) Mansion star, and its 沖 (chōng) clash animal, the same facts any Tong Shu carries, so nothing is asked to be taken on trust.

If you want to explore the day-by-day almanac yourself, the free CrystalStones.com almanac renders these public cycles for any date, and the personal layer, the check against your own Four Pillars, is what our paid selections add on top. Together they follow the same lineage this page describes: the public grading standardized in 協紀辨方書 (Xié Jì Biàn Fāng Shū), the personal grading from the Zi Ping (子平) tradition. The almanac supplies the pattern; the chart supplies the person. This is a pattern, not a verdict.