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Tong Shu Calendar Reference

Auspicious Renovation Start Dates for July 2026裝修 · July 2026

By Master Sean Chan · Updated

This month carries Xiao Shu (小暑) — month flips to 未 on July 7 (Singapore time): the BaZi calendar's sectional boundary for the month. Below is the universal Chinese metaphysics ranking of every day in July 2026 for breaking ground on renovation (動土 / 修造), derived from the classical Tong Shu (通書). Renovation is an Earth-disturbing act and is more sensitive to Earth-related taboos than weddings or business openings.

Top-ranked dates this month

31
days in July
27
pass hard requirements
3
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12026-07-26甲辰收 Gathering胃戌 (Dog)上吉
22026-07-21己亥定 Stabilising危巳 (Snake)上吉
32026-07-31己酉滿 Filling井卯 (Rabbit)上吉
42026-07-13辛卯成 Completing房酉 (Rooster)吉
52026-07-25癸卯成 Completing婁酉 (Rooster)吉

All days in July 2026

DateDay PillarOfficerMansion ClashNotable factorsClass
2026-07-01己卯收觜酉 Rooster黃道吉
2026-07-02庚辰開參戌 Dog建除 開吉
2026-07-03辛巳閉井亥 Pig月德合 · 建除 閉平
2026-07-04壬午建鬼子 Rat建除 建 · 黃道平
2026-07-05癸未除柳丑 Ox—平
2026-07-06甲申滿星寅 Tiger黃道吉
2026-07-07乙酉滿張卯 Rabbit宿 張吉
2026-07-08丙戌平翼辰 Dragon建除 平 · 黃道平
2026-07-09丁亥定軫巳 Snake建除 定 · 黃道吉
2026-07-10戊子執角午 HorseFailed requirement: not_year_break大凶
2026-07-11己丑破亢未 GoatFailed requirement: not_month_break大凶
2026-07-12庚寅危氐申 Monkey建除 危 · 宿 氐 · 黃道凶
2026-07-13辛卯成房酉 Rooster建除 成 · 黃道吉
2026-07-14壬辰收心戌 Dog宿 心吉
2026-07-15癸巳開尾亥 Pig建除 開 · 黃道吉
2026-07-16甲午閉箕子 Rat天德 · 月德 · 建除 閉吉
2026-07-17乙未建斗丑 Ox建除 建平
2026-07-18丙申除牛寅 Tiger黃道吉
2026-07-19丁酉滿女卯 Rabbit—平
2026-07-20戊戌平虛辰 Dragon建除 平 · 宿 虛 · 黃道平
2026-07-21己亥定危巳 Snake天德合 · 月德合 · 建除 定上吉
2026-07-22庚子執室午 HorseFailed requirement: not_year_break大凶
2026-07-23辛丑破壁未 GoatFailed requirement: not_month_break大凶
2026-07-24壬寅危奎申 Monkey建除 危 · 宿 奎 · 黃道平
2026-07-25癸卯成婁酉 Rooster建除 成 · 黃道吉
2026-07-26甲辰收胃戌 Dog天德 · 月德 · 宿 胃上吉
2026-07-27乙巳開昴亥 Pig建除 開 · 黃道吉
2026-07-28丙午閉畢子 Rat建除 閉凶
2026-07-29丁未建觜丑 Ox建除 建平
2026-07-30戊申除參寅 Tiger黃道吉
2026-07-31己酉滿井卯 Rabbit天德合 · 月德合上吉
Personalised next step

BaZi-Aligned Date Report — July 2026

USD 388

A personalised PDF that re-ranks every renovation-suitable day in July 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 is 土王用事 and why is groundbreaking restricted then?

土王用事 are the four 18-day windows around each seasonal transition when the Earth phase is dominant. Disturbing the ground during these windows is taboo for renovation, foundation work, and excavation. The page’s hard-requirement filter excludes these days; for a personal alignment we also check your Earth-element balance.

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.