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Tong Shu Calendar Reference

Auspicious Wedding Dates for August 2027結婚 · August 2027

By Master Sean Chan · Updated

This month carries Li Qiu (立秋) — start of the BaZi autumn on August 8 (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 2027 for a wedding ceremony, derived from the classical Tong Shu (通書). It applies to no specific couple — it shows which days the calendar itself favours or warns against based on the Twelve Officers (建除十二神), Twenty-Eight Mansions (二十八宿), monthly and yearly Shen Sha (神煞), and the Yellow/Black Dao (黃黑道) cycle.

Top-ranked dates this month

31
days in August
26
pass hard requirements
6
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12027-08-28壬午開 Opening鬼子 (Rat)上吉
22027-08-14戊辰成 Completing牛戌 (Dog)上吉
32027-08-05己未建 Establishing軫丑 (Ox)上吉
42027-08-01乙卯成 Completing柳酉 (Rooster)上吉
52027-08-03丁巳開 Opening張亥 (Pig)上吉

All days in August 2027

DateDay PillarOfficerMansion ClashNotable factorsClass
2027-08-01乙卯成柳酉 Rooster建除 成 · 宿 柳 · 黃道上吉
2027-08-02丙辰收星戌 Dog建除 收吉
2027-08-03丁巳開張亥 Pig建除 開 · 宿 張 · 黃道上吉
2027-08-04戊午閉翼子 Rat建除 閉凶
2027-08-05己未建軫丑 Ox天德合 · 月德合 · 建除 建上吉
2027-08-06庚申除角寅 Tiger建除 除 · 黃道平
2027-08-07辛酉除亢卯 RabbitFailed requirement: not_four_separation大凶
2027-08-08壬戌滿氐辰 Dragon月德 · 宿 氐 · 黃道吉
2027-08-09癸亥平房巳 Snake天德 · 建除 平 · 宿 房吉
2027-08-10甲子定心午 Horse建除 定 · 宿 心 · 黃道吉
2027-08-11乙丑執尾未 GoatFailed requirement: not_year_break大凶
2027-08-12丙寅破箕申 MonkeyFailed requirement: not_month_break大凶
2027-08-13丁卯危斗酉 Rooster月德合 · 建除 危 · 宿 斗平
2027-08-14戊辰成牛戌 Dog天德合 · 建除 成 · 宿 牛上吉
2027-08-15己巳收女亥 Pig建除 收 · 宿 女 · 黃道吉
2027-08-16庚午開虛子 Rat建除 開 · 宿 虛吉
2027-08-17辛未閉危丑 Ox建除 閉 · 宿 危 · 黃道凶
2027-08-18壬申建室寅 Tiger月德 · 建除 建吉
2027-08-19癸酉除壁卯 Rabbit天德 · 建除 除 · 宿 壁吉
2027-08-20甲戌滿奎辰 Dragon宿 奎 · 黃道吉
2027-08-21乙亥平婁巳 Snake建除 平 · 宿 婁凶
2027-08-22丙子定胃午 Horse建除 定 · 宿 胃 · 黃道吉
2027-08-23丁丑執昴未 GoatFailed requirement: not_year_break大凶
2027-08-24戊寅破畢申 MonkeyFailed requirement: not_month_break大凶
2027-08-25己卯危觜酉 Rooster建除 危凶
2027-08-26庚辰成參戌 Dog建除 成 · 宿 參 · 黃道上吉
2027-08-27辛巳收井亥 Pig建除 收 · 宿 井 · 黃道吉
2027-08-28壬午開鬼子 Rat月德 · 建除 開上吉
2027-08-29癸未閉柳丑 Ox天德 · 建除 閉 · 宿 柳吉
2027-08-30甲申建星寅 Tiger建除 建平
2027-08-31乙酉除張卯 Rabbit建除 除 · 宿 張平
Personalised next step

BaZi-Aligned Date Report — August 2027

USD 388

A personalised PDF that re-ranks every wedding-suitable day in August 2027 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.

What if my partner’s zodiac clashes with all the top dates?

Both partners’ year branches need to be respected. The universal ranking can’t see your partner; the personalised report does. In practice, the right wedding date is rarely the universally top-ranked one once both charts are considered. That’s expected, not a problem.

Methodology

Day pillars derive from the standard 60 Jiazi anchor (sexagenary day cycle, anchored against the published Tong Shu). Year pillars switch on Li Chun (立春), the first solar term of the BaZi year, computed from the truncated VSOP87 series for solar longitude. Month pillars switch on each sectional solar term. The Twelve Officers are the day branch’s offset from the month branch; the Twenty-Eight Mansions cycle every 28 days against an authoritative anchor.

Per-purpose rules follow the Dong Gong (董公擇日) tradition with adjustments encoded in our open purpose_rules.yaml. Scores are additive over the day’s present 神煞, the officer/mansion preference, and the Yellow Dao bonus, then clamped to 0–100 and classified.