Solar Lunar Converter
Two-way Gregorian and East Asian lunar date conversion
Choose a reference region for Korea, China, Taiwan, Hong Kong, Vietnam, or Japan old-calendar use, then convert Gregorian and lunar dates in both directions. Regular and leap lunar months are handled separately for birthdays, memorial dates, family calendars, and planning notes.
The calculation uses browser international calendar data. It is useful for everyday planning, but formal rituals or official schedules should be checked against your calendar source, institution, or family convention.
Usage Tips
Convert Gregorian and lunar dates without switching pages
Choose a reference region, convert a Gregorian date to a lunar date, or find the matching Gregorian date from a lunar year, month, day, and regular/leap-month setting. Use it for lunar birthdays, memorial dates, family calendars, and East Asian lunisolar calendar notes.
What is Solar Lunar Converter?
The Solar Lunar Converter is a two-way date conversion tool that converts Gregorian dates to lunar dates and lunar dates back to Gregorian dates. East Asian lunisolar-calendar use cases often involve lunar birthdays, memorial dates, family calendar notes, holidays, and leap lunar months where the same lunar month number can repeat. This tool lets you choose a reference region for Korea, China, Taiwan, Hong Kong, Vietnam, or Japan old-calendar use, then convert dates with regular and leap lunar month handling.
How to Use
- 1Choose the reference region whose time-zone date boundary should be used for conversion.
- 2To convert Gregorian to lunar, select a Gregorian date and review the lunar year, month, day, and regular/leap month type.
- 3To convert lunar to Gregorian, enter the lunar year, month, day, and whether the month is regular or leap.
- 4For leap-month birthdays or traditional schedules, confirm both the lunar month number and the regular/leap month setting.
- 5Copy the result into family calendar notes, memorial date records, or planning documents if needed.
Separate conversion direction from leap-month input
Last reviewed: July 11, 2026Two-way calendar conversion
solar → Intl Chinese calendar; lunar → search supported dates matching year, month, day, and leap-month flag
Solar dates are read from the selected time-zone calendar, while lunar-to-solar conversion scans the supported range for a matching month, day, and leap status.
Checking Lunar New Year 2024 in both directions
- • Gregorian 2024-02-10
- • Korea time zone Asia/Seoul
- • Regular lunar 2024 month 1 day 1 for reverse lookup
- 1. Gregorian 2024-02-10 becomes lunar 2024 month 1 day 1
- 2. Regular lunar 2024 month 1 day 1 searches back to Gregorian 2024-02-10
Gregorian February 10, 2024 corresponds to regular lunar month 1, day 1 of lunar year 2024.
How to read the result
- The lunar month and day are not enough when a repeated leap month exists; the leap flag must travel with the input.
- A fixed regional time zone is useful near midnight because it determines the calendar date boundary.
Conditions that change the result
- The supported range is 1900–2100, and an impossible lunar day or leap combination may have no Gregorian match.
- For institutional, religious, or family observances, compare with the calendar source actually used by that group.
Common input mistakes
- Treating regular sixth month and leap sixth month as the same input selects different Gregorian periods.
- Assuming every lunar month has day 29 and day 30 can create a date that does not exist.
Reference Knowledge
- ●The calculation uses browser Intl Chinese calendar data and evaluates dates in the selected reference region's time zone.
- ●The reference region does not load a separate official national almanac. It controls which regional date boundary is used for the East Asian lunisolar-calendar style calculation.
- ●A regular month is the ordinary occurrence of a lunar month number. A leap month is an inserted repeat of the same lunar month number.
- ●A lunar month can have 29 or 30 days. If the entered lunar day does not exist in that month, no matching Gregorian date is shown.
- ●The supported range is 1900 through 2100 to avoid long-range differences across browser calendar data.
- ●For formal rituals, institutional schedules, or regional traditional calendars, compare the result with the calendar source or institution you rely on.
FAQ
Q.Can this convert in both directions?
Yes. It converts Gregorian dates to lunar dates and also finds the matching Gregorian date from a lunar year, month, day, and regular/leap month setting.
Q.Can I convert leap lunar month dates?
Yes. When converting lunar to Gregorian, choose whether the lunar month is regular or leap. If that lunar year and month do not have a leap occurrence, the tool reports that no matching date was found.
Q.Can changing the reference region change the result?
For some date-boundary cases, yes. The selected region controls the time-zone boundary used for conversion, so choose the region that matches the cultural calendar context you want to check.
Q.Why does lunar day 30 sometimes have no result?
Some lunar months have only 29 days. If the selected lunar month is a 29-day month, lunar day 30 does not exist and therefore has no matching Gregorian date.
Q.Can I check a lunar birthday for different years?
Yes. Enter the target lunar year along with the lunar month and day. For leap-month birthdays, also confirm that the selected year actually contains that leap month.
Q.Is this identical to every official calendar?
Not necessarily. The tool uses browser international calendar data and is useful for everyday planning. Important ritual, institutional, or official dates should still be checked against the calendar source you rely on.
