Lunar ↔ Solar Calendar Converter
Convert between solar and lunar dates — find the solar date of a lunar birthday, with leap months, sexagenary year and zodiac. Verified 1900–2100 table, in your browser.
Loading conversion table…
※ Based on the standard 1900–2100 lunar conversion table, cross-checked against Korean anchor dates (Lunar New Year, Chuseok, Buddha's Birthday). It matches the Korea Astronomy Institute (KASI) in almost all cases, but rare timezone-boundary dates may differ by one day. Verify important dates (memorials) with KASI.
🔒 Conversion happens only in your browser; your dates are never sent to a server.
Solar to lunar (find a lunar birthday)
Enter a solar date to see its lunar date instantly — useful for checking today's lunar date or when a solar date falls in the lunar calendar. The result also shows the sexagenary year and zodiac animal, and marks leap-month dates.
Lunar to solar, leap months included
The other direction takes a lunar year, month and day and returns the solar date and weekday — handy for planning a lunar birthday or memorial in the solar calendar. When the year has a leap version of that month, a 'leap month' toggle appears, since regular and leap months are different days.
A verified conversion table
Accuracy is everything for a lunar converter. This tool uses the widely-used 1900–2100 table but does not take it on faith: it was cross-checked against Korean anchor dates — Lunar New Year, Chuseok, Buddha's Birthday and leap months (2020, 2023, 2025) — and all matched. Rare timezone-boundary dates may still differ by one day from KASI, so verify important dates there.
Private by design
Conversion happens entirely in your browser; the birthdays and memorial dates you enter are never sent to a server. Only the table is fetched once, after which it works offline with no install or sign-up.
Frequently asked questions
Can I find the solar date of a lunar birthday each year?
Yes. Switch to Lunar → Solar and enter the lunar date; change the year to see the solar date for any year, so you can mark it on a solar calendar.
How do I enter a leap month?
A 'leap month' checkbox appears only when that year actually has a leap version of the month you entered. Regular and leap months are different dates, so check which one your event follows.
Is the conversion accurate?
It uses the standard 1900–2100 table, cross-verified against Korean Lunar New Year, Chuseok, Buddha's Birthday and leap months. Rare boundary cases may differ by one day from KASI — verify important dates there.
What year range is supported?
1900 to 2100. Dates outside this range cannot be converted, but nearly all birthdays, memorials and holidays fall within it.