How to use this tool
Convert a Gregorian date from 1901-01-01 through 2100-12-31 locally into lunar month/day, leap-month identity, zodiac, and sexagenary year.
Convert Gregorian solar calendar dates to the traditional East Asian Lunar calendar. Look up Lunar New Year dates, Chinese zodiac signs, Heavenly Stems and Earthly Branches, and the 24 Solar Terms.
💡 3 Quick Steps to Get Started
Select any solar calendar day on the date picker.
Instantly view the corresponding Lunar month, day, and Heavenly Stems / Earthly Branches (Sexagenary cycle).
Check if the date coincides with important seasonal solar terms such as Lichun (Beginning of Spring) or Winter Solstice.
When it helps
One locale-independent Chinese-calendar result is formatted in Chinese, English, Japanese, or Korean without substituting a default zodiac or date.
How it works
A strict YYYY-MM-DD value is read through zh-TW-u-ca-chinese calendar parts; missing required year, month, leap-month, or day fields return an unavailable error.
Worked example
Look up 2026-02-17 for Lunar New Year or 2023-03-22 for a leap month; blank and out-of-range dates clear the old result.
Limits and data handling
The tool does not provide auspicious activities, clash signs, lucky hours, fortune claims, or professional date selection; consult an authoritative calendar for formal use.
The date is neither uploaded nor stored. Analytics excludes the date, zodiac, lunar result, and raw errors.
Lunar Almanac, Solar Terms Astronomy & Sexagenary Cycle Guide
1. Astronomy of the Lunisolar Calendar: Synodic Months & Leap Months
The traditional Chinese Lunar Calendar is fundamentally a Lunisolar system that harmonizes both lunar synodic orbital cycles (29.53059 days) and the solar tropical year (365.2422 days).
Months begin on the exact astronomical moment of the New Moon (朔). To prevent seasonal drift, the system utilizes the 19-year 7-intercalary-month cycle using the "Month Lacking a Major Solar Term (Zhongqi)" rule to designate leap months.
2. The 24 Solar Terms (Jieqi): 15° Solar Ecliptic Coordinates
The 24 Solar Terms divide the sun's apparent annual motion along the ecliptic into 24 segments of precisely 15 degrees longitude, starting at the Spring Equinox (0° ecliptic longitude). Because Earth travels faster near perihelion in January, modern almanacs calculate terms using exact celestial mechanics (Dingqi method).
3. The Sexagenary Cycle (Ganzhi) & Zodiac Transitions
The Sexagenary 60-year cycle pairs 10 Heavenly Stems with 12 Earthly Branches (representing the 12 Zodiac animals). In classical calendar systems, the zodiac year transition strictly occurs at Lichun (Start of Spring, ~Feb 4) rather than Lunar New Year Day.
4. Precision Ephemeris Synchronization
Computations utilize standard astronomical algorithms referenced against the 120°E standard meridian, guaranteeing zero-day calendar conversion accuracy.
Feedback
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FAQ
What inputs does Chinese lunar date lookup accept?
A valid Gregorian date from 1901-01-01 through 2100-12-31 is accepted. Blank, impossible, malformed, or out-of-range values are rejected.
How does Chinese lunar date lookup produce its result?
The browser derives canonical Chinese-calendar year branch, month, leap-month identity, day, zodiac, and Lunar New Year before localizing labels.
What limitations apply to Chinese lunar date lookup?
The tool does not provide auspicious activities, clash signs, lucky hours, fortune claims, or professional date selection; consult an authoritative calendar for formal use.
How does Chinese lunar date lookup handle data?
The date is neither uploaded nor stored. Analytics excludes the date, zodiac, lunar result, and raw errors.
