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Tong Shu Calendar Reference

Auspicious Business Opening Dates for March 2027開業 · March 2027

By Master Sean Chan · Updated

This month carries Jing Zhe (驚蟄) — month flips to 卯 on March 6 (Singapore time): the BaZi calendar's sectional boundary for the month. Below is the universal Chinese metaphysics ranking of every day in March 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

31
days in March
26
pass hard requirements
1
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12027-03-18己亥Completing巳 (Snake)上吉
22027-03-12癸巳滿 Filling亥 (Pig)
32027-03-23甲辰Removing戌 (Dog)
42027-03-06丁亥Completing巳 (Snake)
52027-03-13甲午Balancing子 (Rat)

All days in March 2027

DateDay PillarOfficerMansion ClashNotable factorsClass
2027-03-01壬午子 Rat天德合 · 宿 虛
2027-03-02癸未丑 Ox建除 執 · 宿 危 · 黃道
2027-03-03甲申寅 TigerFailed requirement: not_month_break大凶
2027-03-04乙酉卯 Rabbit建除 危
2027-03-05丙戌辰 Dragon建除 危
2027-03-06丁亥巳 Snake建除 成
2027-03-07戊子午 Horse黃道
2027-03-08己丑未 GoatFailed requirement: not_year_break大凶
2027-03-09庚寅申 Monkey建除 閉 · 黃道
2027-03-10辛卯酉 Rooster黃道
2027-03-11壬辰戌 Dog宿 參
2027-03-12癸巳滿亥 Pig建除 滿 · 宿 井
2027-03-13甲午子 Rat月德 · 建除 平 · 黃道
2027-03-14乙未丑 Ox黃道
2027-03-15丙申寅 Tiger建除 執
2027-03-16丁酉卯 RabbitFailed requirement: not_month_break大凶
2027-03-17戊戌辰 Dragon建除 危
2027-03-18己亥巳 Snake月德合 · 建除 成 · 宿 軫上吉
2027-03-19庚子午 Horse黃道
2027-03-20辛丑未 GoatFailed requirement: not_year_break大凶
2027-03-21壬寅申 Monkey建除 閉 · 宿 氐 · 黃道
2027-03-22癸卯酉 Rooster黃道
2027-03-23甲辰戌 Dog月德
2027-03-24乙巳滿亥 Pig建除 滿
2027-03-25丙午子 Rat建除 平 · 宿 箕 · 黃道
2027-03-26丁未丑 Ox宿 斗 · 黃道
2027-03-27戊申寅 Tiger建除 執
2027-03-28己酉卯 RabbitFailed requirement: not_month_break大凶
2027-03-29庚戌辰 Dragon建除 危 · 宿 虛
2027-03-30辛亥巳 Snake建除 成 · 宿 危
2027-03-31壬子午 Horse黃道
Personalised next step

BaZi-Aligned Date Report — March 2027

USD 388

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