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Calendar
Gregorian Chinese lunar
Date of birth
Birth hour (traditional double-hour)
Luck-cycle reference date
Generate My Chart
Try a sample Set to today
▸ Advanced settings (school / year boundary)
Calculation school Default (standard) Zhongzhou school
Year boundary Chinese New Year (default) Li Chun · Start of Spring (~Feb 4)
Different schools use slightly different tables for the Four Transformations and star brightness. If you were born in January or early February, the year boundary matters.
▸ What is Zi Wei Dou Shu?
Purple Star Astrology is a Chinese charting tradition roughly a thousand years old. From your birth year, month, day and hour it places 14 major stars into 12 palaces , each governing an area of life — career, wealth, relationships, health and so on.
Unlike Western astrology it does not use live planetary positions; it uses a fixed star grid combined with the Chinese sexagenary cycle of Heavenly Stems and Earthly Branches . Star brightness, the Four Transformations (Hua Lu / Quan / Ke / Ji) and decade luck cycles refine the reading.
Star names below are shown in English with their original Chinese names on hover. All calculations happen locally in your browser — nothing is uploaded.
Traditional Chinese hours are two-hour blocks. If you don't know your birth time, choose "Unknown" and we'll use noon. Click any palace in the chart for its full reading and its trine & opposition.