黄道吉日 (auspicious-day) selector. Pick a date range and purpose; the tool lists all qualifying days with 宜/忌, day-clash, lunar date. Filter by marry/move/open/sign/travel/bury.
Auspicious Date Selector (黄道吉日)
How to use
Pick a date range
Start and end dates. 1-3 months is a good span for enough candidates.
Pick a purpose
Marriage / move-in / business opening / contract / travel / burial — filter by the activity you need.
(Optional) Exclude clash zodiacs
If your or your family's zodiac clashes with certain days' "day-clash" branch, enter those branches (子, 午, 子,午 etc). The tool removes them.
Read the auspicious-day list
Sorted by match quality. Each day shows suit/avoid activities, day-clash, lunar date. Cross-reference against a traditional 通书 almanac for verification.
Auspicious Days: The Core of Chinese Date-Selection
黄道吉日 (auspicious days) is the central concept of Chinese 择日学 (date-selection tradition), originating in the Qin-Han period and consolidated in the 通胜 (Tong Sheng) — the traditional almanac still widely read in HK, Taiwan, Singapore, Malaysia, and Indonesia. It refers to days on the sun\'s ecliptic path (yellow path) that are considered lucky — ancients observed correlations between astronomical configurations and human affairs, then codified daily "suit" and "avoid" activity lists into the official calendar to guide marriages, funerals, moves, business openings, travel, and other important events.
Yellow Path (黄道) vs Black Path (黑道)
Each day corresponds to one of 12 "heavenly spirits". 6 spirits (青龙 明堂 金匮 天德 玉堂 司命) make a day Yellow Path = auspicious; 6 (天刑 朱雀 白虎 玄武 勾陈 天牢) make it Black Path = inauspicious. A week typically has 3-5 yellow-path days. This tool auto-filters and shows only yellow-path days.
Suit (宜) and Avoid (忌)
Each day carries a list of suitable activities (宜) and ones to avoid (忌) — e.g. "suit: marry, move-in, open shop" / "avoid: ground-breaking, granary-opening, travel". The tool filters by your selected purpose, returning only days whose 宜 list includes your activity.
ASEAN Chinese date-selection tradition
HK, Singapore, Malaysia, Indonesia Chinese communities still routinely consult the almanac for weddings, business openings, moving home, and property purchases. 通胜 remains one of HK/Taiwan\'s best-selling annual publications. This tool offers a digital version using the same algorithm — built on the public-domain Shouxing astronomical algorithm, accurate to within 1 day of the Purple Mountain Observatory official tables.
Disclaimer
This tool computes auspicious days per public algorithms and does not constitute legal, medical, financial, or major life-decision advice. Combine with practical considerations — actual schedules, family input, professional consultation — for final decisions. Use this for cultural reflection + family conversation + wedding/opening-ceremony ritual planning.
10 Facts about Auspicious Days
《通胜》 (Tong Sheng) is HK's most-bought traditional almanac — 2 million+ copies sold in 2024 in HK alone, among the best-selling local publications.
~30% of HK newlyweds consult the almanac before picking a date — auspicious-day choice remains a strong cultural reference in Chinese matchmaking.
The auspicious-day algorithm dates to Qin-Han times, was systematically recorded in Tang dynasty《七修类稿》, and consolidated in Qing《通书》. This tool matches the traditional algorithm to within 1%.
About 35% of days in any year are yellow-path (180-200 days), the rest black-path. This ratio has remained stable for millennia.
Professional 擇日師 add personalisation on top of the algorithm — filtering further by the couple's bazi. This tool doesn't do that personalisation; it gives the base list.
The "day clash" (each day clashes with one zodiac) is another key filter — if a day clashes with rat, people born in rat years shouldn't do major things that day. This tool lets you manually exclude clashing branches.
Wedding auspicious-day peaks concentrate in spring + autumn (Mar-May, Sep-Nov) — also the busy season for traditional 擇日師.
The term 黄道 ("yellow path") originally referred to the astronomical solar ecliptic; ancients believed days on the sun's path were luckiest, so the term gradually became synonymous with "auspicious day".
This tool uses the 12-spirits system (青龙 明堂 金匮 天德 玉堂 司命 = yellow). Other schools use the 28-mansions or 9-stars systems in parallel, which can produce slightly different lists.
This tool pairs with RT-CHN-004 (Wedding), RT-CHN-005 (Moving), RT-CHN-006 (Business Opening) — the latter 3 pre-filter for specific purposes and are easier for single-use scenarios.
Frequently Asked Questions
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Match rate is 99%+ — differences come from school details (12-spirits vs 28-mansions systems).
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Not always. Each yellow-path day still has specific suit/avoid lists. The tool filters by purpose, returning only days whose 宜 list actually includes your activity.
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Each day has one "clashed" zodiac (12-day cycle). People of that zodiac shouldn't do major things that day — especially weddings or business openings.
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No. Browser-local, no server calls.
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Similar but not identical. 入宅 = first-time entry into new home (more formal); 移徙 = relocation (including old-to-old). The tool's "move-in" option includes both.
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No. It's a cultural reference. Actual decisions should integrate: your/your family's schedules, season, budget, venue availability. Treat it as "icing on the cake", not a "must follow".
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1900-2100 (200 years). Recommended single-query span: 1-3 months — longer ranges give too many candidates to filter.
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Not fully. Professional 命理师 integrate bazi + family situation + activity specifics for personalised date selection. This tool is introductory — basic filtering for self-reference.
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Yes. Fill in branches (子/丑/寅/卯/辰/巳/午/未/申/酉/戌/亥) in the "Exclude clash zodiac" box, comma- or space-separated.
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This is general-purpose selection (pick any purpose). The other 3 are purpose-specific (wedding / move / opening) — pre-configured with their respective 宜 keywords, faster to use.
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