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Tong Shu Calendar Reference

Auspicious ROM Dates for September 2028註冊結婚 · September 2028

By Master Sean Chan · Updated

This month carries Bai Lu (白露) — month flips to 酉 on September 7 (Singapore time): the BaZi calendar's sectional boundary for the month. Below is the universal Chinese metaphysics ranking of every day in September 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

30
days in September
26
pass hard requirements
6
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12028-09-01壬辰Completing戌 (Dog)上吉
22028-09-14乙巳Completing亥 (Pig)上吉
32028-09-02癸巳Gathering亥 (Pig)上吉
42028-09-26丁巳Completing亥 (Pig)上吉
52028-09-28己未Opening丑 (Ox)上吉

All days in September 2028

DateDay PillarOfficerMansion ClashNotable factorsClass
2028-09-01壬辰戌 Dog月德 · 建除 成 · 黃道上吉
2028-09-02癸巳亥 Pig天德 · 建除 收 · 宿 亢上吉
2028-09-03甲午子 Rat建除 開 · 宿 氐
2028-09-04乙未丑 Ox建除 閉 · 宿 房 · 黃道
2028-09-05丙申寅 Tiger建除 建 · 宿 心
2028-09-06丁酉卯 Rabbit月德合
2028-09-07戊戌辰 Dragon
2028-09-08己亥滿巳 Snake宿 斗
2028-09-09庚子午 Horse月德 · 建除 平 · 黃道
2028-09-10辛丑未 Goat建除 定 · 宿 女
2028-09-11壬寅申 MonkeyFailed requirement: not_year_break大凶
2028-09-12癸卯酉 RoosterFailed requirement: not_month_break大凶
2028-09-13甲辰戌 Dog建除 危
2028-09-14乙巳亥 Pig月德合 · 建除 成上吉
2028-09-15丙午子 Rat建除 收 · 黃道
2028-09-16丁未丑 Ox建除 開 · 黃道
2028-09-17戊申寅 Tiger建除 閉
2028-09-18己酉卯 Rabbit建除 建 · 黃道
2028-09-19庚戌辰 Dragon月德上吉
2028-09-20辛亥滿巳 Snake
2028-09-21壬子午 Horse四離 · 建除 平 · 黃道
2028-09-22癸丑未 Goat建除 定 · 宿 井
2028-09-23甲寅申 MonkeyFailed requirement: not_year_break大凶
2028-09-24乙卯酉 RoosterFailed requirement: not_month_break大凶
2028-09-25丙辰戌 Dog建除 危
2028-09-26丁巳亥 Pig建除 成 · 宿 張上吉
2028-09-27戊午子 Rat建除 收 · 黃道
2028-09-28己未丑 Ox建除 開 · 宿 軫 · 黃道上吉
2028-09-29庚申寅 Tiger月德 · 建除 閉
2028-09-30辛酉卯 Rabbit建除 建 · 宿 亢 · 黃道
Personalised next step

BaZi-Aligned Date Report — September 2028

USD 388

A personalised PDF that re-ranks every ROM / civil registration-suitable day in September 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.