This page allows you to convert dates of Gregorian Calendar into Ganzhi Calendar (Stem and Branch Calendar / Four-pillars / Eight-characters). Simply enter a date in boxes below and press the "Calculate" button to show that date in Gan Zhi Calendar. This converter is used for studying Ganzhi Calendar, and is NOT APPLICABLE to Four-pillars astrology and Selecting-date astrology. If you use this converter for Four-pillars astrology or Selecting-date astrology, use at your own risk. This calculation is based on the meridian at longitude 120° East.