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Tong Shu Calendar Reference

Auspicious Business Opening Dates for November 2027開業 · November 2027

By Master Sean Chan · Updated

This month carries Li Dong (立冬) — start of the BaZi winter on November 7 (Singapore time): the BaZi calendar's sectional boundary for the month. Winter starts; Water-element days take precedence in many ranking shifts that follow.Below is the universal Chinese metaphysics ranking of every day in November 2027 for opening a business (開市), derived from the classical Tong Shu (通書). Opening is treated as a 'beginning' — the rules favour 開 (Opening) and 建 (Establishing) officers and Yellow Dao days carrying 天德 / 月德 protection.

Top-ranked dates this month

30
days in November
24
pass hard requirements
4
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12027-11-05辛卯執 Holding斗酉 (Rooster)上吉
22027-11-23己酉開 Opening張卯 (Rabbit)上吉
32027-11-18甲辰執 Holding參戌 (Dog)上吉
42027-11-09乙未成 Completing危丑 (Ox)上吉
52027-11-21丁未成 Completing柳丑 (Ox)吉

All days in November 2027

DateDay PillarOfficerMansion ClashNotable factorsClass
2027-11-01丁亥除房巳 Snake黃道吉
2027-11-02戊子滿心午 Horse建除 滿吉
2027-11-03己丑平尾未 GoatFailed requirement: not_year_break大凶
2027-11-04庚寅定箕申 Monkey宿 箕 · 黃道吉
2027-11-05辛卯執斗酉 Rooster天德合 · 月德合 · 建除 執上吉
2027-11-06壬辰破牛戌 DogFailed requirement: not_month_break大凶
2027-11-07癸巳破女亥 PigFailed requirement: not_month_break大凶
2027-11-08甲午危虛子 Rat月德 · 建除 危 · 宿 虛平
2027-11-09乙未成危丑 Ox天德 · 建除 成 · 宿 危上吉
2027-11-10丙申收室寅 Tiger—平
2027-11-11丁酉開壁卯 Rabbit建除 開吉
2027-11-12戊戌閉奎辰 Dragon建除 閉 · 黃道凶
2027-11-13己亥建婁巳 Snake月德合 · 黃道吉
2027-11-14庚子除胃午 Horse天德合吉
2027-11-15辛丑滿昴未 GoatFailed requirement: not_year_break大凶
2027-11-16壬寅平畢申 Monkey建除 平平
2027-11-17癸卯定觜酉 Rooster—平
2027-11-18甲辰執參戌 Dog月德 · 建除 執 · 宿 參上吉
2027-11-19乙巳破井亥 PigFailed requirement: not_month_break大凶
2027-11-20丙午危鬼子 Rat建除 危 · 黃道平
2027-11-21丁未成柳丑 Ox建除 成 · 黃道吉
2027-11-22戊申收星寅 Tiger—平
2027-11-23己酉開張卯 Rabbit月德合 · 建除 開 · 宿 張上吉
2027-11-24庚戌閉翼辰 Dragon天德合 · 建除 閉 · 黃道平
2027-11-25辛亥建軫巳 Snake宿 軫 · 黃道吉
2027-11-26壬子除角午 Horse—平
2027-11-27癸丑滿亢未 GoatFailed requirement: not_year_break大凶
2027-11-28甲寅平氐申 Monkey月德 · 建除 平 · 宿 氐平
2027-11-29乙卯定房酉 Rooster天德吉
2027-11-30丙辰執心戌 Dog建除 執 · 黃道吉
Personalised next step

BaZi-Aligned Date Report — November 2027

USD 388

A personalised PDF that re-ranks every business opening-suitable day in November 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.

Should I open the business on the same day as my company registration?

If you can — yes. Aligning the opening with the legal incorporation compounds the day’s influence on both events. If they have to be different, prioritise the opening (the customer-facing first day) over the registration date.

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.