The Chinese Gender Calendar is one of the world’s most enduring pregnancy traditions. Loved by generations of expectant parents, this ancient chart maps out predictions using maternal age and month of conception.
In this guide, we explore the calendar’s historical roots in Chinese lunar astronomy, how lunar months differ from Western months, and how to accurately look up your predictions.
The Lunar Basis of the Chinese Gender Calendar
Unlike Western solar calendars that calculate 365 days around the Sun, the traditional Chinese calendar is lunisolar. It aligns month lengths with the 29.53-day cycle of the moon.
Why Lunar Dates Matter
Because Chinese New Year moves each year between January 21 and February 20, using your standard solar birthday will frequently produce incorrect lookup rows.
For example, a mother born on February 5, 1996 was born before Chinese New Year 1996 (which fell on February 19). Therefore, her lunar birth year is 1995, altering her traditional lunar age.
History of the Qing Dynasty Calendar Chart
Legend has it that royal court astrologers developed the Chinese Gender Calendar over 700 years ago during the Qing Dynasty. It was kept exclusively within the royal palace to guide imperial family planning.
During the Boxer Rebellion in 1900, the chart was reportedly discovered and translated. Today, it remains popular across global digital platforms.
How to Convert Your Dates
- Calculate Lunar Age: Add 1 or 2 years to your age at conception based on whether you were born before or after Chinese New Year.
- Find Lunar Conception Month: Match your conception date to the Chinese lunar month for that year.
- Locate Intersection: Find your age on the vertical column and month on the top row to see the result.
You can calculate these conversions automatically with our free Chinese Gender Predictor Tool.
Medical Disclaimer
The Chinese Gender Calendar is strictly for fun and cultural interest. Clinical methods such as ultrasound, NIPT blood testing, CVS, or amniocentesis are the only medically accurate ways to determine fetal sex.