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Tong Shu Calendar Reference

Auspicious ROM Dates for August 2028註冊結婚 · 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 civil registration of marriage (ROM in Singapore), derived from the classical Tong Shu (通書). ROM uses a tighter rule set than a full ceremonial wedding — registration is a single act that benefits from 開 (Opening) and 成 (Completing) days and avoids 閉 (Closing) days more strictly than a full banquet.

Top-ranked dates this month

31
days in August
27
pass hard requirements
7
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12028-08-08戊辰成 Completing心戌 (Dog)上吉
22028-08-04甲子執 Holding角午 (Horse)上吉
32028-08-22壬午開 Opening畢子 (Rat)上吉
42028-08-28戊子定 Stabilising星午 (Horse)上吉
52028-08-13癸酉除 Removing女卯 (Rabbit)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 · 宿 房吉
2028-08-08戊辰成心戌 Dog天德合 · 建除 成 · 宿 心上吉
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 · 宿 女上吉
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 · 黃道吉
2028-08-17丁丑執壁未 Goat月德合 · 黃道吉
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宿 井吉
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 ROM / civil registration-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.

Does the timing of ROM matter as much as a wedding ceremony?

Energetically yes — the registration is the legal-binding moment, and the day-pillar element it sits on travels with the marriage record. Practically the rule set is slightly looser than a full banquet (no need for 喜慶 stars), but month-break and year-break disqualifiers still apply absolutely.

Methodology

Each day’s pillar is computed from the 60 Jiazi rotation anchored against the published Tong Shu, not from any single calendar app. The BaZi year flips at Li Chun (立春) and the BaZi month flips at every sectional solar term, both calculated from VSOP87 solar-longitude data so the boundaries land on the right minute. Twelve Officers and the 28 Mansions each rotate deterministically against well-known anchors.

The per-purpose weights are Dong Gong’s (董公擇日) — adjusted where modern almanacs disagree, in favour of the Hong Kong Observatory and Taiwan CWB lineage. Auspicious stars add to the score, taboo stars subtract, the day’s officer and mansion shift it further, and Yellow Dao adds a final small bonus. The final number gets capped at 100 and mapped to one of five tiers.