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Tong Shu Calendar Reference

Auspicious Wedding Dates for May 2026結婚 · May 2026

By Master Sean Chan · Updated

This month carries Li Xia (立夏) — start of the BaZi summer on May 5 (Singapore time): the BaZi calendar's sectional boundary for the month. Mid-month transition into the BaZi summer; element balance shifts noticeably across the term.Below is the universal Chinese metaphysics ranking of every day in May 2026 for a wedding ceremony, derived from the classical Tong Shu (通書). It applies to no specific couple — it shows which days the calendar itself favours or warns against based on the Twelve Officers (建除十二神), Twenty-Eight Mansions (二十八宿), monthly and yearly Shen Sha (神煞), and the Yellow/Black Dao (黃黑道) cycle.

Top-ranked dates this month

31
days in May
26
pass hard requirements
7
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12026-05-24辛丑Completing未 (Goat)上吉
22026-05-14辛卯Opening酉 (Rooster)上吉
32026-05-08乙酉Stabilising卯 (Rabbit)上吉
42026-05-12己丑Completing未 (Goat)上吉
52026-05-13庚寅Gathering申 (Monkey)上吉

All days in May 2026

DateDay PillarOfficerMansion ClashNotable factorsClass
2026-05-01戊寅申 Monkey建除 開 · 宿 奎 · 黃道
2026-05-02己卯酉 Rooster建除 閉 · 宿 婁
2026-05-03庚辰戌 Dog建除 建 · 宿 胃 · 黃道
2026-05-04辛巳亥 PigFailed requirement: not_four_separation大凶
2026-05-05壬午子 Rat建除 除 · 宿 畢 · 黃道
2026-05-06癸未滿丑 Ox黃道
2026-05-07甲申寅 Tiger建除 平 · 宿 參
2026-05-08乙酉卯 Rabbit月德合 · 建除 定 · 宿 井上吉
2026-05-09丙戌辰 Dragon天德合 · 建除 執 · 黃道上吉
2026-05-10丁亥巳 SnakeFailed requirement: not_month_break大凶
2026-05-11戊子午 HorseFailed requirement: not_year_break大凶
2026-05-12己丑未 Goat建除 成 · 宿 張 · 黃道上吉
2026-05-13庚寅申 Monkey月德 · 建除 收上吉
2026-05-14辛卯酉 Rooster天德 · 建除 開 · 宿 軫上吉
2026-05-15壬辰戌 Dog建除 閉 · 黃道
2026-05-16癸巳亥 Pig建除 建 · 宿 亢
2026-05-17甲午子 Rat建除 除 · 宿 氐 · 黃道
2026-05-18乙未滿丑 Ox月德合 · 宿 房 · 黃道上吉
2026-05-19丙申寅 Tiger天德合 · 建除 平 · 宿 心
2026-05-20丁酉卯 Rabbit建除 定
2026-05-21戊戌辰 Dragon建除 執 · 宿 箕 · 黃道
2026-05-22己亥巳 SnakeFailed requirement: not_month_break大凶
2026-05-23庚子午 HorseFailed requirement: not_year_break大凶
2026-05-24辛丑未 Goat天德 · 建除 成 · 宿 女上吉
2026-05-25壬寅申 Monkey建除 收 · 宿 虛
2026-05-26癸卯酉 Rooster建除 開 · 宿 危
2026-05-27甲辰戌 Dog建除 閉 · 黃道
2026-05-28乙巳亥 Pig月德合 · 建除 建 · 宿 壁
2026-05-29丙午子 Rat天德合 · 建除 除 · 宿 奎
2026-05-30丁未滿丑 Ox宿 婁 · 黃道
2026-05-31戊申寅 Tiger建除 平 · 宿 胃
Personalised next step

BaZi-Aligned Date Report — May 2026

USD 388

A personalised PDF that re-ranks every wedding-suitable day in May 2026 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.

What if my partner’s zodiac clashes with all the top dates?

Both partners’ year branches need to be respected. The universal ranking can’t see your partner; the personalised report does. In practice, the right wedding date is rarely the universally top-ranked one once both charts are considered. That’s expected, not a problem.

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.