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Tong Shu Calendar Reference

Auspicious ROM Dates for January 2026註冊結婚 · January 2026

By Master Sean Chan · Updated

Below is the universal Chinese metaphysics ranking of every day in January 2026 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 January
26
pass hard requirements
6
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12026-01-08乙酉成 Completing壁卯 (Rabbit)上吉
22026-01-13庚寅除 Removing畢申 (Monkey)上吉
32026-01-28乙巳定 Stabilising尾亥 (Pig)上吉
42026-01-20丁酉成 Completing張卯 (Rabbit)上吉
52026-01-23庚子閉 Closing角午 (Horse)上吉

All days in January 2026

DateDay PillarOfficerMansion ClashNotable factorsClass
2026-01-01戊寅滿箕申 Monkey—吉
2026-01-02己卯平斗酉 Rooster建除 平 · 宿 斗 · 黃道吉
2026-01-03庚辰定牛戌 Dog建除 定吉
2026-01-04辛巳執女亥 Pig宿 女吉
2026-01-05壬午執虛子 Rat—吉
2026-01-06癸未破危丑 OxFailed requirement: not_month_break大凶
2026-01-07甲申危室寅 Tiger建除 危 · 黃道平
2026-01-08乙酉成壁卯 Rabbit天德合 · 月德合 · 建除 成上吉
2026-01-09丙戌收奎辰 Dragon建除 收 · 黃道吉
2026-01-10丁亥開婁巳 SnakeFailed requirement: not_year_break大凶
2026-01-11戊子閉胃午 Horse建除 閉平
2026-01-12己丑建昴未 Goat建除 建平
2026-01-13庚寅除畢申 Monkey天德 · 月德 · 黃道上吉
2026-01-14辛卯滿觜酉 Rooster黃道吉
2026-01-15壬辰平參戌 Dog建除 平平
2026-01-16癸巳定井亥 Pig建除 定 · 宿 井 · 黃道上吉
2026-01-17甲午執鬼子 Rat—吉
2026-01-18乙未破柳丑 OxFailed requirement: not_month_break大凶
2026-01-19丙申危星寅 Tiger建除 危 · 黃道平
2026-01-20丁酉成張卯 Rabbit建除 成 · 宿 張上吉
2026-01-21戊戌收翼辰 Dragon建除 收 · 黃道吉
2026-01-22己亥開軫巳 SnakeFailed requirement: not_year_break大凶
2026-01-23庚子閉角午 Horse天德 · 月德 · 建除 閉上吉
2026-01-24辛丑建亢未 Goat建除 建 · 宿 亢平
2026-01-25壬寅除氐申 Monkey宿 氐 · 黃道平
2026-01-26癸卯滿房酉 Rooster宿 房 · 黃道吉
2026-01-27甲辰平心戌 Dog建除 平 · 宿 心平
2026-01-28乙巳定尾亥 Pig天德合 · 月德合 · 建除 定上吉
2026-01-29丙午執箕子 Rat—吉
2026-01-30丁未破斗丑 OxFailed requirement: not_month_break大凶
2026-01-31戊申危牛寅 Tiger建除 危 · 黃道平
Personalised next step

BaZi-Aligned Date Report — January 2026

USD 388

A personalised PDF that re-ranks every ROM / civil registration-suitable day in January 2026 against your BaZi (and, for weddings/ROM, your partner’s BaZi). It surfaces:

Order the report →

Other ranked dates this month

Each purpose carries its own Dong Gong rule set — Top 5 dates can shift dramatically between purposes for the same month.

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.

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.