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Tong Shu Calendar Reference

Auspicious ROM Dates for July 2027註冊結婚 · July 2027

By Master Sean Chan · Updated

This month carries Xiao Shu (小暑) — month flips to 未 on July 7 (Singapore time): the BaZi calendar's sectional boundary for the month. Below is the universal Chinese metaphysics ranking of every day in July 2027 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 July
27
pass hard requirements
6
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12027-07-16己亥Stabilising巳 (Snake)上吉
22027-07-21甲辰Gathering戌 (Dog)上吉
32027-07-31甲寅Dangerous申 (Monkey)上吉
42027-07-03丙戌Stabilising辰 (Dragon)上吉
52027-07-26己酉滿 Filling卯 (Rabbit)上吉

All days in July 2027

DateDay PillarOfficerMansion ClashNotable factorsClass
2027-07-01甲申滿寅 Tiger黃道
2027-07-02乙酉卯 Rabbit建除 平 · 宿 井 · 黃道
2027-07-03丙戌辰 Dragon月德 · 建除 定上吉
2027-07-04丁亥巳 Snake
2027-07-05戊子午 HorseFailed requirement: not_month_break大凶
2027-07-06己丑未 GoatFailed requirement: not_year_break大凶
2027-07-07庚寅申 Monkey建除 危 · 黃道
2027-07-08辛卯酉 Rooster建除 成 · 宿 軫 · 黃道上吉
2027-07-09壬辰戌 Dog建除 收
2027-07-10癸巳亥 Pig建除 開 · 宿 亢 · 黃道
2027-07-11甲午子 Rat天德 · 月德 · 建除 閉
2027-07-12乙未丑 Ox建除 建 · 宿 房
2027-07-13丙申寅 Tiger宿 心 · 黃道
2027-07-14丁酉滿卯 Rabbit
2027-07-15戊戌辰 Dragon建除 平 · 黃道
2027-07-16己亥巳 Snake天德合 · 月德合 · 建除 定上吉
2027-07-17庚子午 Horse
2027-07-18辛丑未 GoatFailed requirement: not_month_break, not_year_break大凶
2027-07-19壬寅申 Monkey建除 危 · 黃道
2027-07-20癸卯酉 Rooster建除 成 · 宿 危 · 黃道
2027-07-21甲辰戌 Dog天德 · 月德 · 建除 收上吉
2027-07-22乙巳亥 Pig建除 開 · 黃道
2027-07-23丙午子 Rat建除 閉
2027-07-24丁未丑 Ox建除 建
2027-07-25戊申寅 Tiger黃道
2027-07-26己酉滿卯 Rabbit天德合 · 月德合上吉
2027-07-27庚戌辰 Dragon建除 平 · 黃道
2027-07-28辛亥巳 Snake建除 定 · 黃道
2027-07-29壬子午 Horse
2027-07-30癸丑未 GoatFailed requirement: not_month_break, not_year_break大凶
2027-07-31甲寅申 Monkey天德 · 月德 · 建除 危上吉
Personalised next step

BaZi-Aligned Date Report — July 2027

USD 388

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

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

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.