Methodology & Astronomical Architecture
The traditional lunar calendar (Yin Li) is an astronomical lunisolar system tracking the synodic month of 29.53 days and solar terms (Jie Qi). Unlike purely solar calendars, it integrates the gravitational pull of the moon with seasonal agricultural rhythms.
How the Astronomical Solar-to-Lunar Algorithm Works
Our engine utilizes the Ho Ngoc Duc astronomical algorithm (UTC+7 for Vietnam and UTC+8 for Greater China) to determine the exact astronomical new moon moment. This eliminates historical month-shift errors found in generic algorithms.
Heavenly Stems & Earthly Branches (Can Chi) Coordinates
Every day, month, and year carries a dual cosmic coordinate formed by one of 10 Heavenly Stems and one of 12 Earthly Branches. These 60-year and 60-day sexagenary cycles provide the foundation for Bazi chart analysis and Feng Shui timing.
Practical Applications in Daily Metaphysics
Converting your solar birth date into precise lunar coordinates allows you to determine your true natal animal, auspicious dates for significant contracts, and harmony with environmental energy flows.