How the Chinese Gender Calendar Works
Understand the traditional lunar chart and how to use it.
Learn lunar age calculation, conception month mapping, and its limitations.
Core Principles
Lunar Age
The chart uses maternal lunar age, which may differ from the Western age. In many traditions, lunar age starts at one and increments at lunar new year.
Conception Month
The month used is the conception month aligned to the lunar calendar. The chart highlights the predicted outcome for the intersection of lunar age and conception month.
Traditional Mapping
The calendar is a traditional reference table, not a medical diagnostic. Different sources may show minor variations across years or versions.
How to Use
1) Determine the mother’s lunar age for the year.
2) Identify the conception month based on the lunar calendar.
3) Find the intersection in the chart to see the traditional prediction.
If you don’t know your exact conception date, estimate it first, then convert it into a lunar month before matching the chart.
Conception Date vs Due Date
A common mistake is using the baby’s birth date or due date to pick the chart year. The traditional method uses the conception date. If conception happens late in a year but the due date is in the next year, the chart match still uses the conception date.
Use the conception date calculator if you only know your due date or last period.
Common Mistakes
- Using the Gregorian month instead of the lunar conception month.
- Using current age instead of lunar age at conception.
- Assuming estimated dates are exact when they may be a window.
Accuracy and Limitations
The chart is for cultural reference only and does not guarantee outcomes. Biological sex determination depends on genetics and medical factors. Use responsibly for entertainment or tradition.
When different sources disagree, choose the one consistent with your local tradition or consult multiple references.