Skip to content
Tong Shu Calendar Reference

Auspicious Business Opening Dates for February 2028開業 · February 2028

By Master Sean Chan · Updated

This month carries Li Chun (立春) — start of the BaZi year on February 4 (Singapore time): the BaZi calendar's sectional boundary for the month. Pre-Li-Chun days still belong to the previous BaZi year — factor that into anything date-binding (registration, ground-breaking).Below is the universal Chinese metaphysics ranking of every day in February 2028 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

29
days in February
24
pass hard requirements
7
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12028-02-18丙子開 Opening角午 (Horse)上吉
22028-02-04壬戌成 Completing奎辰 (Dragon)上吉
32028-02-28丙戌成 Completing虛辰 (Dragon)上吉
42028-02-02庚申危 Dangerous室寅 (Tiger)上吉
52028-02-06甲子開 Opening胃午 (Horse)上吉

All days in February 2028

DateDay PillarOfficerMansion ClashNotable factorsClass
2028-02-01己未破危丑 OxFailed requirement: not_month_break大凶
2028-02-02庚申危室寅 Tiger天德 · 月德 · 建除 危上吉
2028-02-03辛酉成壁卯 Rabbit四絕 · 建除 成平
2028-02-04壬戌成奎辰 Dragon天德合 · 建除 成 · 黃道上吉
2028-02-05癸亥收婁巳 Snake—平
2028-02-06甲子開胃午 Horse建除 開 · 黃道上吉
2028-02-07乙丑閉昴未 Goat建除 閉 · 黃道凶
2028-02-08丙寅建畢申 MonkeyFailed requirement: not_year_break大凶
2028-02-09丁卯除觜酉 Rooster天德吉
2028-02-10戊辰滿參戌 Dog建除 滿 · 宿 參 · 黃道上吉
2028-02-11己巳平井亥 Pig建除 平 · 宿 井 · 黃道平
2028-02-12庚午定鬼子 Rat—平
2028-02-13辛未執柳丑 Ox月德合 · 建除 執 · 黃道上吉
2028-02-14壬申破星寅 TigerFailed requirement: not_month_break大凶
2028-02-15癸酉危張卯 Rabbit建除 危 · 宿 張平
2028-02-16甲戌成翼辰 Dragon建除 成 · 黃道吉
2028-02-17乙亥收軫巳 Snake宿 軫吉
2028-02-18丙子開角午 Horse月德 · 建除 開 · 黃道上吉
2028-02-19丁丑閉亢未 Goat天德 · 建除 閉 · 宿 亢平
2028-02-20戊寅建氐申 MonkeyFailed requirement: not_year_break大凶
2028-02-21己卯除房酉 Rooster—平
2028-02-22庚辰滿心戌 Dog建除 滿 · 黃道吉
2028-02-23辛巳平尾亥 Pig月德合 · 建除 平 · 黃道吉
2028-02-24壬午定箕子 Rat天德合 · 宿 箕吉
2028-02-25癸未執斗丑 Ox建除 執 · 宿 斗 · 黃道吉
2028-02-26甲申破牛寅 TigerFailed requirement: not_month_break大凶
2028-02-27乙酉危女卯 Rabbit建除 危平
2028-02-28丙戌成虛辰 Dragon月德 · 建除 成 · 宿 虛上吉
2028-02-29丁亥收危巳 Snake天德 · 宿 危吉
Personalised next step

BaZi-Aligned Date Report — February 2028

USD 388

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

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

Day pillars derive from the standard 60 Jiazi anchor (sexagenary day cycle, anchored against the published Tong Shu). Year pillars switch on Li Chun (立春), the first solar term of the BaZi year, computed from the truncated VSOP87 series for solar longitude. Month pillars switch on each sectional solar term. The Twelve Officers are the day branch’s offset from the month branch; the Twenty-Eight Mansions cycle every 28 days against an authoritative anchor.

Per-purpose rules follow the Dong Gong (董公擇日) tradition with adjustments encoded in our open purpose_rules.yaml. Scores are additive over the day’s present 神煞, the officer/mansion preference, and the Yellow Dao bonus, then clamped to 0–100 and classified.