Guide / 01
When to use it
Use it to place a Korean lunar birthday or memorial date on a Gregorian schedule, or to identify the lunar date corresponding to a historical Gregorian record.
TIME / 010
Korean Lunar Calendar
Convert supported Korean solar and lunar dates in either direction.
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Converted date
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Guide / 02
Quick guide
- Choose Solar to lunar or Lunar to solar before entering the date.
- Enter a date from 1000-02-13 through 2050-12-31 and, for lunar input, specify whether it is a leap month.
- Run the conversion and compare the year, month, day, and leap-month label with the source record.
Check
Validate the result
Convert a solar date to lunar and then convert that result back with the correct leap setting; it should return the original solar date.
Limits
Know the limits
Dates outside the supported range cannot be converted, and choosing the wrong regular or leap month produces a different date. The dataset follows the Korean lunisolar calendar, not every regional lunar calendar.
Reference
Input and output example
Use the same units and settings when comparing your result with this example.
- Example input
Solar → lunar · 2026-09-25- Result and interpretation
Lunar 2026-08-15 (regular month) Converting 2026-08-15 back with leap month unchecked gives 2026-09-25.
FAQ
Frequently asked
Can the same lunar month and day map to two solar dates?
In a year with an intercalary month, a regular month and a leap month can share the same month number. The original record must identify which one applies.
Does my data leave this device?
No. This tool is designed to process its working data in your browser. Advertising may load separately, but your tool input is never sent with it.