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Tong Shu Calendar Reference

Auspicious Renovation Start Dates for October 2026裝修 · October 2026

By Master Sean Chan · Updated

This month carries Han Lu (寒露) — month flips to 戌 on October 8 (Singapore time): the BaZi calendar's sectional boundary for the month. Below is the universal Chinese metaphysics ranking of every day in October 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 October
25
pass hard requirements
2
rank as 上吉
5
top picks below
DateDay PillarOfficer 建除 Mansion 宿Clash 沖Class
12026-10-16丙寅定 Stabilising奎申 (Monkey)上吉
22026-10-21辛未收 Gathering觜丑 (Ox)上吉
32026-10-28戊寅定 Stabilising翼申 (Monkey)吉
42026-10-07丁巳成 Completing尾亥 (Pig)吉
52026-10-20庚午成 Completing畢子 (Rat)吉

All days in October 2026

DateDay PillarOfficerMansion ClashNotable factorsClass
2026-10-01辛亥滿軫巳 Snake—平
2026-10-02壬子平角午 HorseFailed requirement: not_year_break大凶
2026-10-03癸丑定亢未 Goat建除 定 · 宿 亢吉
2026-10-04甲寅執氐申 Monkey建除 執 · 宿 氐 · 黃道吉
2026-10-05乙卯破房酉 RoosterFailed requirement: not_month_break大凶
2026-10-06丙辰危心戌 Dog建除 危 · 宿 心平
2026-10-07丁巳成尾亥 Pig建除 成吉
2026-10-08戊午成箕子 Rat建除 成 · 宿 箕吉
2026-10-09己未收斗丑 Ox—平
2026-10-10庚申開牛寅 Tiger建除 開 · 黃道吉
2026-10-11辛酉閉女卯 Rabbit天德合 · 月德合 · 建除 閉吉
2026-10-12壬戌建虛辰 Dragon建除 建 · 宿 虛平
2026-10-13癸亥除危巳 Snake宿 危 · 黃道平
2026-10-14甲子滿室午 HorseFailed requirement: not_year_break大凶
2026-10-15乙丑平壁未 Goat建除 平 · 宿 壁平
2026-10-16丙寅定奎申 Monkey天德 · 月德 · 建除 定上吉
2026-10-17丁卯執婁酉 Rooster建除 執吉
2026-10-18戊辰破胃戌 DogFailed requirement: not_month_break大凶
2026-10-19己巳危昴亥 Pig建除 危 · 黃道平
2026-10-20庚午成畢子 Rat建除 成吉
2026-10-21辛未收觜丑 Ox天德合 · 月德合上吉
2026-10-22壬申開參寅 Tiger建除 開 · 黃道吉
2026-10-23癸酉閉井卯 Rabbit建除 閉 · 黃道凶
2026-10-24甲戌建鬼辰 Dragon建除 建平
2026-10-25乙亥除柳巳 Snake黃道吉
2026-10-26丙子滿星午 HorseFailed requirement: not_year_break大凶
2026-10-27丁丑平張未 Goat建除 平 · 宿 張平
2026-10-28戊寅定翼申 Monkey建除 定 · 黃道吉
2026-10-29己卯執軫酉 Rooster建除 執吉
2026-10-30庚辰破角戌 DogFailed requirement: not_month_break大凶
2026-10-31辛巳危亢亥 Pig天德合 · 月德合 · 建除 危吉
Personalised next step

BaZi-Aligned Date Report — October 2026

USD 388

A personalised PDF that re-ranks every renovation-suitable day in October 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

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.