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Tong Shu Calendar Reference

Auspicious Contract Signing Dates for January 2028簽約 · January 2028

By Master Sean Chan · Updated

This month carries Xiao Han (小寒) — minor cold on January 6 (Singapore time): the BaZi calendar's sectional boundary for the month. Below is the universal Chinese metaphysics ranking of every day in January 2028 for signing a contract (立券 / 交易), derived from the classical Tong Shu (通書). Contracts are agreements meant to hold — the rules favour 定 (Stabilising), 成 (Completing), and 執 (Holding) officers.

Top-ranked dates this month

31
days in January
26
pass hard requirements
7
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12028-01-18乙巳定 Stabilising張亥 (Pig)上吉
22028-01-23庚戌收 Gathering氐辰 (Dragon)上吉
32028-01-28乙卯滿 Filling斗酉 (Rooster)上吉
42028-01-06癸巳定 Stabilising壁亥 (Pig)上吉
52028-01-30丁巳定 Stabilising女亥 (Pig)上吉

All days in January 2028

DateDay PillarOfficerMansion ClashNotable factorsClass
2028-01-01戊子建牛午 Horse建除 建 · 黃道平
2028-01-02己丑除女未 GoatFailed requirement: not_year_break大凶
2028-01-03庚寅滿虛申 Monkey—吉
2028-01-04辛卯平危酉 Rooster建除 平 · 宿 危 · 黃道平
2028-01-05壬辰平室戌 Dog建除 平平
2028-01-06癸巳定壁亥 Pig建除 定 · 宿 壁 · 黃道上吉
2028-01-07甲午執奎子 Rat建除 執 · 宿 奎吉
2028-01-08乙未破婁丑 OxFailed requirement: not_month_break大凶
2028-01-09丙申危胃寅 Tiger建除 危 · 黃道平
2028-01-10丁酉成昴卯 Rabbit建除 成上吉
2028-01-11戊戌收畢辰 Dragon建除 收 · 黃道吉
2028-01-12己亥開觜巳 Snake建除 開 · 黃道吉
2028-01-13庚子閉參午 Horse天德 · 月德 · 建除 閉上吉
2028-01-14辛丑建井未 GoatFailed requirement: not_year_break大凶
2028-01-15壬寅除鬼申 Monkey建除 除 · 黃道平
2028-01-16癸卯滿柳酉 Rooster黃道吉
2028-01-17甲辰平星戌 Dog建除 平平
2028-01-18乙巳定張亥 Pig天德合 · 月德合 · 建除 定上吉
2028-01-19丙午執翼子 Rat建除 執吉
2028-01-20丁未破軫丑 OxFailed requirement: not_month_break大凶
2028-01-21戊申危角寅 Tiger建除 危 · 黃道平
2028-01-22己酉成亢卯 Rabbit建除 成 · 宿 亢吉
2028-01-23庚戌收氐辰 Dragon天德 · 月德 · 建除 收上吉
2028-01-24辛亥開房巳 Snake建除 開 · 黃道吉
2028-01-25壬子閉心午 Horse建除 閉平
2028-01-26癸丑建尾未 GoatFailed requirement: not_year_break大凶
2028-01-27甲寅除箕申 Monkey建除 除 · 宿 箕 · 黃道平
2028-01-28乙卯滿斗酉 Rooster天德合 · 月德合 · 宿 斗上吉
2028-01-29丙辰平牛戌 Dog建除 平平
2028-01-30丁巳定女亥 Pig建除 定 · 黃道上吉
2028-01-31戊午執虛子 Rat建除 執吉
Personalised next step

BaZi-Aligned Date Report — January 2028

USD 388

A personalised PDF that re-ranks every contract signing-suitable day in January 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.

If a contract is signed on a 大凶 day, is the contract void?

Legally no — the document is binding regardless. Energetically the method holds that the agreement carries the day’s deficits (month break weakens its longevity; year break invites reversal). Choose another day if at all possible; if you can’t, the personalised report identifies the least-bad alternative.

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.