{ "schemaVersion": "wenbu-knowledge-v1", "id": "guide-chinese-zodiac-vs-bazi", "slug": "chinese-zodiac-vs-bazi", "language": "en", "title": "Chinese zodiac and BaZi: which new year counts?", "description": "Understand Lunar New Year, the beginning-of-spring solar term and why births in January or February need a clear year-boundary convention.", "sections": [ { "heading": "Different questions can use different year boundaries", "paragraphs": [ "Everyday Chinese-zodiac descriptions often use Lunar New Year, while BaZi year pillars commonly change at the beginning-of-spring solar term. These are different conventions rather than one year label that can be copied everywhere.", "For a January or February birthday, first ask whether you are identifying a zodiac animal or calculating a Four Pillars year pillar. A simple operation on the Gregorian year can miss the relevant boundary." ] }, { "heading": "Consider early February 2024", "paragraphs": [ "In Hong Kong time, Lunar New Year in 2024 fell on February 10 and the beginning-of-spring term on February 4, as shown in the Hong Kong Observatory calendar. A birth between them may receive different year labels under the two conventions.", "The useful response is to show the calendar rule, not to select the label that sounds more appealing. A birth on the transition day also requires the time and time zone, not just the date." ] }, { "heading": "A zodiac animal is only one part of a chart", "paragraphs": [ "The animal corresponds to the year branch. BaZi also includes the year stem and three more pillars. The Day Master is the day stem, not the zodiac animal. Applying a general animal description to the entire chart omits the rest of its structure.", "Wenbu shows the lunar date and four pillars. Its calculation notes explain the solar-term boundaries for the year and month pillars. State the relevant year boundary when comparing a folk-zodiac label with a BaZi year pillar." ] }, { "heading": "State which boundary you are comparing", "paragraphs": [ "When asking for a zodiac animal, specify whether you mean the Lunar New Year convention or the beginning-of-spring boundary used for the BaZi year pillar. A date near the start of the year can receive different labels without either calendar conversion being wrong.", "In Wenbu, follow the year-pillar convention when reading the four pillars. Do not substitute a folk-zodiac label based on Lunar New Year for the BaZi year branch. For a boundary example, provide a sample date and zone and ask for the solar-term instant." ] } ], "updated": "2026-09-30", "authorship": "Wenbu · AI-assisted editorial; no independent expert review claimed", "evidenceType": "editorial", "links": { "html": "https://wenbu.app/en/learn/chinese-zodiac-vs-bazi/", "markdown": "https://wenbu.app/knowledge/en/chinese-zodiac-vs-bazi.md", "json": "https://wenbu.app/knowledge/en/chinese-zodiac-vs-bazi.json" }, "outline": [ { "id": "quick-answer", "title": "The short answer" }, { "id": "section-0", "title": "Different questions can use different year boundaries" }, { "id": "section-1", "title": "Consider early February 2024" }, { "id": "reference-table", "title": "Five fields that should not be collapsed into one" }, { "id": "section-2", "title": "A zodiac animal is only one part of a chart" }, { "id": "section-3", "title": "State which boundary you are comparing" }, { "id": "worked-example", "title": "Why Rabbit and Dragon can appear in the same record" }, { "id": "glossary", "title": "Key terms" }, { "id": "questions", "title": "Common questions" }, { "id": "sources", "title": "Sources and their scope" } ], "answer": "A Chinese zodiac animal and a BaZi chart are not two names for the same information. Popular zodiac usage commonly follows Lunar New Year; Wenbu’s BaZi year pillar changes at the Li Chun solar term. A birth between those boundaries can receive different labels. The year branch is also only one character in a full chart, not the Day Master.", "takeaways": [ "Ask which year boundary is being used before looking up an animal. A Gregorian year alone is insufficient near the beginning of the year.", "A lunar-calendar animal and a BaZi year branch can legitimately differ if each field states its convention.", "The animal corresponds to a branch; the Day Master is the day stem. They are different fields, not interchangeable descriptions." ], "figure": { "caption": "One birth record can answer several different calendar questions.", "description": "Four cards explain the conventions behind the popular zodiac animal, BaZi year pillar, Day Master and complete four pillars. This guide uses Lunar New Year for the animal, the Li Chun instant for the year pillar and the day stem for the Day Master. The complete chart combines year, month, day and hour rules. The table below adds the Gregorian year and the results for one Shanghai sample." }, "table": { "title": "Five fields that should not be collapsed into one", "columns": [ "Field", "Convention", "Shanghai, 2024-02-06 at 12:00" ], "rows": [ [ "Popular zodiac animal", "Lunar New Year boundary in this guide", "Rabbit: still in the preceding lunar year" ], [ "BaZi year pillar", "The instant of Li Chun", "Jia Chen: Chen corresponds to Dragon" ], [ "Day Master", "The stem of the day pillar", "Geng: yang Metal, not an animal" ], [ "Complete four pillars", "Year, month, day and hour rules together", "甲辰 / 丙寅 / 庚子 / 壬午" ], [ "Gregorian year", "Changes on January 1", "2024; insufficient by itself for a boundary case" ] ] }, "example": { "title": "Why Rabbit and Dragon can appear in the same record", "intro": "Use February 6, 2024 at 12:00, Asia/Shanghai, civil time and a midnight day boundary. The sample is clearly separated from both transitions, making the distinction easier to see.", "steps": [ "Check the year’s calendar. The Hong Kong Observatory’s 2024 conversion table places Li Chun on February 4 and the first day of the first lunar month on February 10. A general recollection that the holidays occur in February is insufficient.", "Apply the popular Lunar New Year convention used here. February 6 remains in the preceding lunar year, giving Rabbit. This does not assign Rabbit to the whole Gregorian year.", "Apply the BaZi convention. February 6 is after Li Chun, giving Jia Chen, whose branch corresponds to Dragon. The complete sample is Jia Chen / Bing Yin / Geng Zi / Ren Wu, with Geng as the Day Master.", "When another website disagrees, inspect its boundary before comparing personality descriptions. Does it use Lunar New Year, the calendar date of Li Chun, or the precise transition? A birth on the transition date also requires time and zone.", "Keep a complete note: “Rabbit by the Lunar New Year convention; Jia Chen year pillar by Li Chun; Shanghai civil time.” Ask an Agent to preserve the two definitions rather than overwriting one label with the other." ], "conclusion": "The difference can be explained by calendar conventions. It does not require deciding which animal feels more familiar. Separate fields with explicit rules make the record useful to both people and software." }, "faq": [ { "question": "Is Li Chun always February 4?", "answer": "Do not use a fixed date as a universal rule. Li Chun is an instant defined by the Sun’s longitude. Its local date or clock time can differ by year and time zone, so check the actual transition for a boundary case." }, { "question": "Does sharing an animal mean sharing a similar chart?", "answer": "It establishes only the same year-branch animal under the chosen convention. The year stem and the month, day and hour pillars may differ. It does not establish similar experiences or relationship quality." }, { "question": "Why do some people use Li Chun for their zodiac animal?", "answer": "They may be using the BaZi year convention. The purpose here is to name the boundary, not to prescribe one label for every cultural setting. A holiday-calendar question and a BaZi-year question can retain their own definitions." } ], "glossary": [ { "term": "Year branch", "definition": "The earthly-branch part of a year pillar, traditionally associated with a zodiac animal." }, { "term": "Lunar New Year boundary", "definition": "The first day of the first lunar month; used for the popular-zodiac example in this guide." }, { "term": "Li Chun boundary", "definition": "The beginning-of-spring solar-term instant used for the BaZi year pillar, rather than January 1." } ], "sources": [ { "title": "Hong Kong Observatory · 2024 calendar conversion table", "url": "https://www.hko.gov.hk/en/gts/time/calendar/pdf/files/2024e.pdf", "scope": "Checks February 4 Li Chun and February 10 Lunar New Year for the example; it does not endorse divinatory claims." }, { "title": "Hong Kong Observatory · The 24 Solar Terms", "url": "https://www.hko.gov.hk/en/gts/time/24solarterms.htm", "scope": "Defines Li Chun at solar longitude 315° and explains why an approximate date is not the precise boundary." }, { "title": "Wenbu · BaZi calculation and declared conventions", "url": "https://github.com/Digidai/wenbu/blob/main/src/lib/bazi.ts", "scope": "Shows that the lunar-year animal and solar-term year pillar are separate fields; the example was checked with the actual engine." }, { "title": "Hong Kong Observatory · Gregorian–Lunar conversion tables", "url": "https://www.hko.gov.hk/en/gts/time/conversion.htm", "scope": "Further reading; not validation of real-world predictions." }, { "title": "lunar-typescript · calculation source and examples", "url": "https://github.com/6tail/lunar-typescript", "scope": "Further reading; not validation of real-world predictions." } ] }