Gregorian-Lunar Calendar Converter

Convert any Gregorian date to its Chinese Lunar Calendar equivalent — or reverse the lookup from Lunar Year, Month, and Day back to a standard date. Enter your input date, choose a conversion direction (Gregorian → Lunar or Lunar → Gregorian), and get back the converted date, Zodiac Animal, Lunar Year Type, and Month Length.

Enter the Gregorian (standard) date you want to convert.

Enter the lunar year (e.g. 2025)

Lunar month number (1–12, or 13 for leap month)

Lunar day of the month (1–30)

Results

Converted Date

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Calendar System

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Zodiac Animal

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Lunar Year Type

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Month Length

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Lunar Date (Y/M/D)

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Frequently Asked Questions

What is the Chinese Lunar Calendar?

The Chinese Lunar Calendar is a lunisolar system based on both the cycles of the moon and the position of the sun. Each year contains 12 or 13 months, with months alternating between 29 and 30 days. It's used across East Asia to mark traditional holidays, zodiac years, and auspicious dates.

Why might the converted result seem slightly off?

The Chinese New Year doesn't fall on January 1 — it shifts each year based on lunar cycles, typically landing between late January and mid-February. Dates near the start of a new lunar year can appear to be in the previous or next year depending on which side of that boundary they fall.

What is a leap month in the lunar calendar?

A leap month (闰月) is an extra month added to the lunar calendar roughly every 2–3 years to keep it aligned with the solar year. It repeats the same number as the month it follows — for example, a leap 4th month means there are two 4th months in that year. This can mean a Gregorian date falls in a 'double' month.

How is the Chinese zodiac animal determined?

Each Chinese lunar year is associated with one of 12 zodiac animals in a repeating cycle: Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, and Pig. The animal changes at Chinese New Year, not on January 1, so early-year Gregorian dates may still belong to the previous zodiac year.

What years does this converter support?

This converter supports dates from 1900 to 2100, covering over 200 years of Gregorian and Chinese Lunar calendar cross-reference data based on established astronomical calculations.

What is the difference between a regular and a leap lunar year?

A regular lunar year has 12 months (354–355 days), while a leap lunar year has 13 months (383–384 days) due to the addition of a leap month. Leap years are inserted to synchronize the lunar calendar with the solar year, preventing the months from drifting through the seasons.

Can I convert a Lunar date back to a Gregorian date?

Yes — use the 'Lunar → Gregorian' direction, enter the Lunar Year, Month, and Day fields, and the tool will return the corresponding standard Gregorian calendar date.

Why are traditional Chinese holidays on different Gregorian dates each year?

Festivals like Chinese New Year, Mid-Autumn Festival, and the Dragon Boat Festival are tied to fixed lunar calendar dates, but because the lunar calendar shifts relative to the Gregorian calendar, their Gregorian equivalents change every year. This converter helps you find those exact Gregorian dates.

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