Method and assumptions
Convert Korean lunar dates used for birthdays, anniversaries, and memorial observances to and from Gregorian dates. Lunar input distinguishes leap months and is limited to the bundled calendar data range.
Korean Lunar Calendar Converter
Convert dates between the Korean lunar calendar and Gregorian calendar.
Reviewed: 2026-07-21
How to use it
- Choose Gregorian-to-lunar or lunar-to-Gregorian.
- Enter the date and mark a lunar leap month when applicable.
- Review the converted date and calendar details.
When it helps
- Finding a Gregorian date for a lunar birthday
- Converting a memorial date
- Organizing a Korean family calendar
How to verify the result
Check input units and reference dates first. For an important decision, compare the result with an official source or original document. A rounded display can differ slightly from the underlying value.
Official references
Frequently asked questions
What is a lunar leap month?
It is an extra month inserted in some years to keep the lunar calendar aligned with seasons. The leap-month flag matters because a month name can repeat.
Can every historical or future date be converted?
No. Conversion is restricted to the supported range of the bundled Korean lunar data.
Does a lunar birthday use the same Gregorian date every year?
No. Different month lengths and leap months cause the Gregorian date to change.