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Tong Shu Calendar Reference

Auspicious Contract Signing Dates for August 2028簽約 · August 2028

By Master Sean Chan · Updated

This month carries Li Qiu (立秋) — start of the BaZi autumn on August 7 (Singapore time): the BaZi calendar's sectional boundary for the month. Autumn proper begins with this term; Wood-day rankings tend to weaken from this point.Below is the universal Chinese metaphysics ranking of every day in August 2028 for signing a contract (立券 / 交易), derived from the classical Tong Shu (通書). Contracts are agreements meant to hold — the rules favour 定 (Stabilising), 成 (Completing), and 執 (Holding) officers.

Top-ranked dates this month

31
days in August
27
pass hard requirements
8
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12028-08-04甲子執 Holding角午 (Horse)上吉
22028-08-08戊辰成 Completing心戌 (Dog)上吉
32028-08-28戊子定 Stabilising星午 (Horse)上吉
42028-08-17丁丑執 Holding壁未 (Goat)上吉
52028-08-22壬午開 Opening畢子 (Rat)上吉

All days in August 2028

DateDay PillarOfficerMansion ClashNotable factorsClass
2028-08-01辛酉滿張卯 Rabbit宿 張吉
2028-08-02壬戌平翼辰 Dragon建除 平 · 黃道平
2028-08-03癸亥定軫巳 Snake建除 定 · 宿 軫 · 黃道上吉
2028-08-04甲子執角午 Horse天德 · 月德 · 建除 執上吉
2028-08-05乙丑破亢未 GoatFailed requirement: not_month_break大凶
2028-08-06丙寅破氐申 MonkeyFailed requirement: not_month_break, not_year_break大凶
2028-08-07丁卯危房酉 Rooster月德合 · 建除 危平
2028-08-08戊辰成心戌 Dog天德合 · 建除 成 · 黃道上吉
2028-08-09己巳收尾亥 Pig建除 收 · 黃道吉
2028-08-10庚午開箕子 Rat建除 開 · 宿 箕吉
2028-08-11辛未閉斗丑 Ox建除 閉 · 宿 斗 · 黃道平
2028-08-12壬申建牛寅 Tiger月德 · 建除 建吉
2028-08-13癸酉除女卯 Rabbit天德 · 建除 除吉
2028-08-14甲戌滿虛辰 Dragon黃道吉
2028-08-15乙亥平危巳 Snake建除 平 · 宿 危平
2028-08-16丙子定室午 Horse建除 定 · 黃道上吉
2028-08-17丁丑執壁未 Goat月德合 · 建除 執 · 宿 壁上吉
2028-08-18戊寅破奎申 MonkeyFailed requirement: not_month_break, not_year_break大凶
2028-08-19己卯危婁酉 Rooster建除 危平
2028-08-20庚辰成胃戌 Dog建除 成 · 黃道上吉
2028-08-21辛巳收昴亥 Pig建除 收 · 黃道吉
2028-08-22壬午開畢子 Rat月德 · 建除 開上吉
2028-08-23癸未閉觜丑 Ox天德 · 建除 閉 · 黃道吉
2028-08-24甲申建參寅 Tiger建除 建平
2028-08-25乙酉除井卯 Rabbit建除 除 · 宿 井平
2028-08-26丙戌滿鬼辰 Dragon黃道吉
2028-08-27丁亥平柳巳 Snake月德合 · 建除 平吉
2028-08-28戊子定星午 Horse天德合 · 建除 定 · 黃道上吉
2028-08-29己丑執張未 Goat建除 執 · 宿 張 · 黃道吉
2028-08-30庚寅破翼申 MonkeyFailed requirement: not_month_break, not_year_break大凶
2028-08-31辛卯危軫酉 Rooster建除 危 · 宿 軫平
Personalised next step

BaZi-Aligned Date Report — August 2028

USD 388

A personalised PDF that re-ranks every contract signing-suitable day in August 2028 against your BaZi (and, for weddings/ROM, your partner’s BaZi). It surfaces:

Order the report →

See the full glossary of classical date-selection terms in the BaZi Glossary & Auxiliary Stars.

Further reading from the blog

Selected posts from Master Sean Chan's blog covering this topic and closely related ones in practice:

Frequently asked

Why isn’t my day on the list of top 5?

The top list is the universal ranking before any personal adjustment. Many couples find their best date isn’t in the top 5. Once you account for your day pillars, the right day often shifts. That’s exactly the gap the BaZi-Aligned Date Report fills.

What does 大凶 mean and can it ever be overridden?

大凶 means the day fails a hard classical requirement: 月破 (month break), 歲破 (year break), or 四離/四絕 (a quarter-day boundary). These cannot be overridden by personal alignment; they are excluded categorically. Choose another day.

Why don’t you show times here?

Hour selection is personal. The right hour depends on your day pillar and the chosen day’s element relationship to it. Publishing universal “auspicious hours” misleads readers into thinking a generic hour is safe; it isn’t. Hours are included in the personalised report.

Where do these scores come from?

The classical Tong Shu (通書) tradition: 建除十二神 (Twelve Officers), 二十八宿 (Twenty-Eight Mansions), 月德 / 天德 (monthly and yearly virtue stars), 黃黑道 (Yellow/Black Dao), and the Dong Gong (董公) per-purpose rules. We compute these directly from astronomical solar terms — no app shortcuts.

If a contract is signed on a 大凶 day, is the contract void?

Legally no — the document is binding regardless. Energetically the method holds that the agreement carries the day’s deficits (month break weakens its longevity; year break invites reversal). Choose another day if at all possible; if you can’t, the personalised report identifies the least-bad alternative.

Methodology

Pillars use the 60 Jiazi day cycle anchored to the published Tong Shu. The BaZi year flips at Li Chun, the BaZi month flips at each sectional solar term — both computed from VSOP87 ephemeris data. The Twelve Officers (建除) and the 28 Mansions each have their own deterministic rotation against an authoritative anchor.

Weights come from the Dong Gong (董公擇日) school. Auspicious 神煞 add, taboo 神煞 subtract, the officer and mansion adjust, Yellow Dao adds a small bonus on top. Sum, clamp to 0–100, classify. No app shortcuts.