Lunar Converter | How to use and interpret results
Convert Gregorian dates and lunar year, month, day and leap-month fields with a bundled lunisolar table. Agreement with the Korean official calendar has not been verified across the full range.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
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How to use this tool
Choose a conversion direction and enter the date. The leap-month selection matters for lunar-to-Gregorian conversion; read boundary errors near the supported limits.
Results and examples
The table anchors Gregorian 1900-01-31 to lunar 1900-01-01. A correct anchor alone does not validate every year, so check an official calendar before fixing an important date.
Worked example
The table anchors Gregorian 1900-01-31 to lunar 1900-01-01. A correct anchor alone does not validate every year, so check an official calendar before fixing an important date.
Limitations
- Full-range agreement with Korea Astronomy and Space Science Institute data remains unverified.
- The cyclical-year display follows the lunar year, which can differ from a spring-term chart convention.
Fields
| Field | Guidance and constraints |
|---|---|
| Solar | Check the unit and format displayed beside this field. |
| Lunar year | Check the unit and format displayed beside this field. |
| Lunar month | Check the unit and format displayed beside this field. |
| Lunar day | Check the unit and format displayed beside this field. |
| Leap month | Check the unit and format displayed beside this field. |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
What is the table's anchor date?
The table anchors Gregorian 1900-01-31 to lunar 1900-01-01. A correct anchor alone does not validate every year, so check an official calendar before fixing an important date.
Can I finalize an important observance from this result alone?
Full-range agreement with Korea Astronomy and Space Science Institute data remains unverified. The cyclical-year display follows the lunar year, which can differ from a spring-term chart convention.
