Two-Way Calendar Conversion

Gregorian Lunar
Converter

Convert any date between the Gregorian calendar and the Chinese lunar calendar with instant, accurate results.

Our gregorian lunar converter lets you convert gregorian to lunar and convert lunar to gregorian in seconds. This free chinese lunar calendar converter handles leap months, Chinese zodiac animals, and Lunar New Year dates for every year from 1900 to 2100.

Gregorian Lunar Date Converter

Convert any date between the Gregorian (solar) calendar and the Chinese lunar calendar with instant results.

Choose a date to convert

Gregorian ↔ Lunar Calendar Converter · Chinese Lunisolar System · 1900–2100

Process

How to Use the Gregorian Lunar Converter

Three simple steps to convert between solar and lunar dates.

1
Step 1

Choose Your Direction

Select whether you want to convert gregorian to lunar or lunar to gregorian using the tabs at the top of the converter.

2
Step 2

Enter Your Date

Pick a Gregorian date, or enter the lunar year, month, and day — ticking the leap-month box if your date falls in an intercalary month.

3
Step 3

Get Your Converted Date

View the exact converted date with the zodiac animal, stem-branch year, leap-month status, and today's lunar date for reference.

What Is a Gregorian Lunar Converter?

A Two-Way Date Translator Between Calendars

A gregorian lunar converter is a tool that translates a date between the Gregorian (solar) calendar — the international standard used in everyday life — and the Chinese lunar calendar, a lunisolar system that tracks the moon's phases. Our free converter works in both directions: convert gregorian to lunar to find your Chinese lunar date, or convert lunar to gregorian to see exactly which solar date a lunar date falls on. Unlike a simple age estimator, a true chinese lunar calendar converter resolves the exact lunar month, day, and year — including intercalary (leap) months.

Two Systems, One Date

The Gregorian calendar divides the year into 12 months based on the Earth's orbit around the Sun (~365.24 days). The Chinese lunar calendar divides its year into 12 synodic months of 29 or 30 days each (~354 days). Because the two systems drift apart by roughly 11 days per year, a single Gregorian date never maps to a fixed lunar date — a gregorian lunar date converter handles this drift automatically for every year.

Why a Converter Matters

Converting Gregorian dates to lunar dates is essential for Chinese New Year, Mid-Autumn Festival, traditional birthdays, Chinese zodiac readings, and the famous Chinese Gender Chart. Our gregorian-to-lunar converter gives you the precise lunar month and day so you never miss a traditional celebration or miscalculate a lunar age.

How Gregorian-to-Lunar Conversion Works

The Calculation Method

The Chinese lunar calendar is a lunisolar system. To keep lunar months aligned with the seasons, a leap month (闰月) is inserted roughly every 2–3 years, producing a 13-month lunar year of about 384 days. Our converter uses the standard astronomical Chinese calendar for the years 1900–2100. When you convert gregorian to lunar, it counts the exact days from the epoch date (January 31, 1900 = Lunar New Year's Day of the 庚子 year) and resolves the year, month, day, and leap status using the official month-length tables. Reversing it (lunar to gregorian) sums the days of each lunar year and month back to the matching solar date.

Gregorian → Lunar: Days since 1900-01-31 ÷ lunar month lengths → Lunar Year / Month / Day
Lunar → Gregorian: Σ days of lunar years/months → offset from 1900-01-31 → Gregorian date
29.53

Synodic Month

The average time between two identical moon phases. Lunar months alternate between 29 and 30 days.

+11

Days Drift Per Year

The lunar year is ~354 days, about 11 days shorter than the Gregorian year — which is why a gregorian lunar date converter is needed each year.

~3yr

Leap Month Cycle

A leap month is added about every 3 years so Lunar New Year always falls between January 21 and February 20.

Real Conversion Example

January 22, 2023 (Gregorian)

Converts to 正月初一 — the first day of the First Lunar Month of 2023, the Year of the Rabbit (癸卯年). It is Lunar New Year's Day.

August 15 (Lunar) → Gregorian

The 15th day of the Eighth Lunar Month is the Mid-Autumn Festival. In 2023 it fell on September 29, but in 2024 it fell on September 17 — proof that lunar dates shift each Gregorian year.

Gregorian vs Lunar Calendar — Key Differences

Aspect Gregorian Chinese Lunar
Calendar Type Solar Lunisolar
Basis Earth's orbit (~365.24 days) Moon's phases (~29.53 days/month)
Year Length 365/366 days 354 or 384 days
Months 12 fixed months 12 months + leap month every ~3 years
New Year January 1 (fixed) Between January 21 and February 20 (varies)
Weekday Structure 7-day weeks No fixed weekday alignment
Primary Use Official, business, everyday life Festivals, zodiac, traditional age
Epoch (Start) 1 CE (Dionysius) 2697 BCE (traditional) / 1900 (tabular)

Chinese Lunar New Year Dates (2020–2035)

Lunar Year Gregorian Date Zodiac Leap Month
2020 January 25, 2020 Rat Month 4
2021 February 12, 2021 Ox None
2022 February 1, 2022 Tiger None
2023 January 22, 2023 Rabbit Month 2
2024 February 10, 2024 Dragon None
2025 January 29, 2025 Snake Month 6
2026 February 17, 2026 Horse None
2027 February 6, 2027 Goat None
2028 January 26, 2028 Monkey Month 5
2029 February 13, 2029 Rooster None
2030 February 3, 2030 Dog None
2031 January 23, 2031 Pig Month 3
2032 February 11, 2032 Rat None
2033 January 31, 2033 Ox Month 11
2034 February 19, 2034 Tiger None
2035 February 8, 2035 Rabbit None

Lunar New Year always falls between January 21 and February 20 in the Gregorian calendar.

The 12 Lunar Months of the Chinese Calendar

# Chinese English Key Festivals
1 正月 First Month Lunar New Year, Spring Festival, Lantern Festival
2 二月 Second Month Dragon Head Raising Festival (Feb 2)
3 三月 Third Month Qingming (Tomb-Sweeping) Festival
4 四月 Fourth Month Buddha's Birthday (Apr 8)
5 五月 Fifth Month Dragon Boat Festival (May 5)
6 六月 Sixth Month Mid-year festivals, lotus viewing
7 七月 Seventh Month Qixi, Ghost Festival (Jul 15)
8 八月 Eighth Month Mid-Autumn (Moon) Festival (Aug 15)
9 九月 Ninth Month Double Ninth Festival (Sep 9)
10 十月 Tenth Month Winter clothing festival (Oct 1)
11 冬月 Eleventh Month Winter solstice period
12 腊月 Twelfth Month Kitchen God festival, New Year preparations

Leap months carry the same name as the preceding month and are prefixed with 闰 (rùn, "leap").

Why People Use a Gregorian Lunar Converter

🎂 Lunar Birthdays

Many East Asian families celebrate birthdays on the lunar calendar. A gregorian to lunar birthday converter reveals your exact lunar birth date, which your lunar birthday falls on each year — and whether you were born in a leap month.

🐉 Chinese Zodiac

Your zodiac animal depends on the lunar year of your birth, not the Gregorian year. Someone born on January 25, 2020 is a Pig (lunar year 2019), while January 26, 2020 marks the Rat — a one-day difference that changes your entire zodiac.

📅 Festivals & Traditions

Convert Gregorian dates to lunar dates to track Spring Festival, Lantern Festival, Qingming, Dragon Boat, and Mid-Autumn Festival, which all follow the lunar calendar and shift ~11 days earlier each solar year.

👶 Chinese Gender Chart

The traditional Chinese Gender Chart requires the mother's lunar age and the lunar month of conception. Convert both Gregorian dates with our lunar converter, then use our Chinese gender predictor for the prediction.

Common Mistakes When Converting Gregorian to Lunar

Assuming a Fixed Offset

Some people think a lunar date is "Gregorian date + 11 days". This is wrong — because of leap months, the offset changes every year and even within a year. Only a real gregorian lunar converter handles this correctly.

Ignoring the Leap Month

Years like 2023 (leap second month) and 2025 (leap sixth month) contain an extra month. A lunar-to-gregorian conversion that ignores the leap month can be off by a full month — about 29 days.

Confusing Lunar Age with Lunar Date

Your lunar date tells you the day (e.g., 正月初一), while lunar age adds +1 at birth and increments on Lunar New Year. Use our lunar age calculator for the age system.

Using the Wrong Regional Calendar

Chinese, Korean, and Vietnamese lunar calendars can differ on the timing of a leap month. This converter uses the standard Chinese (Shanghai/Purple Mountain Observatory) astronomical calendar used by most global sources.

Gregorian Lunar Converter — Frequently Asked Questions

What is a gregorian lunar converter?

A gregorian lunar converter is a tool that translates dates between the Gregorian (solar) calendar and the Chinese lunar (lunisolar) calendar in both directions. It returns the exact lunar year, month, day, leap-month status, and zodiac animal for any Gregorian date, and vice versa.

How do I convert gregorian to lunar?

Select the "Gregorian → Lunar" tab above, pick your date, and press Convert. The converter returns the corresponding Chinese lunar date, including the lunar year, zodiac animal, and whether the date falls in a leap month.

How do I convert a lunar date to gregorian?

Switch to the "Lunar → Gregorian" tab, enter the lunar year, month, and day (ticking "leap month" if applicable), and press Convert. You'll get the exact Gregorian date and weekday.

What is a leap lunar month?

A leap month (闰月) is an extra lunar month added roughly every three years to keep the lunisolar calendar aligned with the seasons. It repeats the number of a regular month (e.g., 闰二月 after 二月). The converter handles these automatically.

Is the lunar date the same as my lunar age?

No. The lunar date is the calendar day (like 正月初五), while lunar age is a separate system where you are considered 1 at birth and gain a year each Lunar New Year. Convert your birth date here, then use the lunar age calculator for your lunar age.

What date range does the converter support?

The converter supports the standard Chinese lunar calendar for the years 1900 to 2100. This covers modern birthdays, family history research, and forward planning for generations to come.

When is Chinese New Year in the Gregorian calendar?

Lunar New Year always falls between January 21 and February 20. It is the first day of the First Lunar Month. Check the reference table above to see the exact Gregorian date of Lunar New Year from 2020 to 2035.

Why does the same lunar festival move every Gregorian year?

Because the lunar year is about 11 days shorter than the Gregorian year, lunar dates shift roughly 11 days earlier each solar year — until a leap month resets the alignment. This is why you need a gregorian lunar converter instead of a fixed table.

Lunar Age Calculator

Now that you know your lunar date, find your lunar age in years, months, and days with the +1 birth-year rule.

Lunar Age Calculator

Chinese Gender Predictor

Use your converted lunar dates with the ancient Qing Dynasty chart to predict baby gender instantly.

Gender Predictor

Islamic Lunar Age

Convert your birth date to the Hijri calendar and calculate your age in Islamic lunar years with automatic conversion.

Hijri Converter