Quick Answer: What Is the Chinese Lunar Calendar?
The Chinese Lunar Calendar, also called the Chinese Calendar or Chinese Lunisolar Calendar, is the traditional calendar system used in Chinese culture for festivals, zodiac years, lunar birthdays, solar terms, ancestor rituals, auspicious dates, and folk customs.
In English, it is often called a “lunar calendar,” but that name is not fully accurate. Strictly speaking, the Chinese Lunar Calendar is a lunisolar calendar. It uses the Moon to organize months and the Sun to keep the calendar aligned with the seasons.
The basic idea is simple:
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Months follow the Moon: a lunar month begins near the new moon.
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A lunar month has 29 or 30 days: these are often called small months and big months.
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A common year has 12 lunar months: about 353–355 days.
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A leap year has 13 lunar months: about 383–385 days.
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The 24 Solar Terms follow the Sun: they mark seasonal changes, climate patterns, and farming time.
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Leap months keep the calendar aligned with seasons: they prevent the lunar year from drifting away from spring, summer, autumn, and winter.
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Festivals follow lunar dates or solar terms: Chinese New Year, Dragon Boat Festival, and Mid-Autumn Festival follow lunar dates; Qingming and Winter Solstice follow solar terms.
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Zodiac and fortune-telling systems depend on calendar boundaries: Chinese Zodiac, BaZi, Tai Sui, and auspicious date selection all use traditional time systems.
Modern China uses the Gregorian calendar for work, school, government, and business, but the lunar calendar still shapes festivals, family customs, zodiac readings, lunar birthdays, and traditional cultural life.
Key point: the Chinese Lunar Calendar is not simply a “Moon calendar.” It connects the Moon, the Sun, seasonal rhythm, leap months, festivals, zodiac years, and everyday Chinese folk life.
Chinese Lunar Calendar, Chinese Calendar, and Lunisolar Calendar: Are They the Same?
These names are often used together, but they do not mean exactly the same thing. The difference matters because “lunar calendar” can mislead readers into thinking the Chinese calendar only follows the Moon.
| Term | Chinese Meaning | What It Means | Accuracy |
|---|---|---|---|
| Chinese Lunar Calendar | 农历 | the most common English name for the traditional Chinese calendar | common, but not fully precise |
| Chinese Calendar | 中国历法 | a broader name for the traditional Chinese calendar system | neutral |
| Chinese Lunisolar Calendar | 中国阴阳合历 | a calendar that uses both lunar months and solar seasonal markers | most accurate |
| Lunar Calendar | 太阴历 | a calendar based only on Moon phases | not accurate for the Chinese calendar |
| Lunisolar Calendar | 阴阳合历 | a calendar that combines the Moon and the Sun | accurate category |
| Nongli | 农历 | “agricultural calendar,” the common modern Chinese name | common Chinese usage |
| Yinli | 阴历 | “yin calendar” or “lunar calendar,” often used casually | common but less precise |
| Xiali | 夏历 | “Xia calendar,” an older traditional name | historical or cultural |
| Jiuli | 旧历 | “old calendar,” used to distinguish it from the modern Gregorian calendar | informal |
In daily English, “Chinese Lunar Calendar” is acceptable because it is the common search term. The accurate explanation is that the Chinese calendar is lunisolar: it uses lunar months, solar terms, and leap months to keep festivals and seasons aligned.
Why the Chinese Lunar Calendar Is Not a Pure Lunar Calendar
The biggest misunderstanding about the Chinese Lunar Calendar is the word “lunar.” The calendar uses the Moon, but it does not use the Moon alone.
| Feature | Pure Lunar Calendar | Chinese Lunisolar Calendar |
|---|---|---|
| Month Basis | Moon phases only | Moon phases |
| Year Structure | usually 12 lunar months | 12 or 13 lunar months |
| Seasonal Alignment | gradually drifts away from seasons | kept aligned with seasons |
| Solar System Used? | no | yes, through the 24 Solar Terms |
| Leap Adjustment | not used to keep seasons aligned | leap month added when needed |
| Example | Islamic calendar | Chinese calendar, Hebrew calendar |
One lunar cycle from new moon to new moon is about 29.5 days, so 12 lunar months make about 354 days. A solar year is about 365.25 days, leaving a gap of about 11 days each year.
If no correction is added, lunar months slowly drift through the seasons. After enough years, a spring festival could move into winter, autumn, or summer.
The Chinese calendar avoids this by combining three layers:
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lunar months keep the calendar connected with the Moon;
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solar terms keep it connected with the Sun and the seasons;
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leap months correct the gap between 12 lunar months and one solar year.
A simple way to remember it: Chinese lunar months follow the Moon, but the Chinese calendar year is kept aligned with the Sun. That is why it is called a lunisolar calendar.
How the Chinese Lunar Calendar Works
The Chinese Lunar Calendar is easier to understand when you separate its three layers: lunar months, solar terms, and leap months.
| Calendar Feature | How It Works |
|---|---|
| Start of Month | a lunar month begins near the new moon |
| Middle of Month | the 15th day is usually near the full moon |
| Month Length | 29 or 30 days |
| Common Year | 12 lunar months, about 353–355 days |
| Leap Year | 13 lunar months, about 383–385 days |
| Leap Month | an extra full lunar month, not an extra day |
| Solar Terms | 24 markers based on the Sun’s position |
| Principal Terms / Zhongqi | important solar markers used in leap month rules |
| Calendar-Year Alignment | lunar years do not match Gregorian years exactly |
Chu Yi (初一), the first day of a lunar month, is near the new moon. Shi Wu (十五), the fifteenth day, is near the full moon. This is why Mid-Autumn Festival, on the fifteenth day of the eighth lunar month, is associated with the full moon.
Because 12 lunar months are shorter than a solar year, the Chinese calendar sometimes adds a full extra month. The leap month is not fixed; it may appear after different months in different years. In traditional rules, a lunar month without a principal solar term, or zhongqi (中气), may become a leap month.
Chinese Lunar Calendar vs Gregorian Calendar
The Gregorian calendar is the modern international calendar used for daily work, school, business, travel, and government. The Chinese Lunar Calendar is a traditional lunisolar calendar used mainly for festivals, folk customs, zodiac years, lunar birthdays, and cultural timing.
| Feature | Chinese Lunar Calendar | Gregorian Calendar |
|---|---|---|
| Calendar Type | lunisolar | solar |
| Month Basis | Moon phases | fixed civil months |
| Month Length | 29 or 30 days | 28, 29, 30, or 31 days |
| Common Year Length | about 353–355 days | 365 days |
| Leap Year Length | about 383–385 days | 366 days |
| Leap System | leap month | leap day |
| New Year Date | changes each year in Gregorian dates | fixed on January 1 |
| Festival Dates | lunar-date festivals shift in Gregorian dates | fixed-date festivals stay the same |
| Main Modern Use | festivals, birthdays, zodiac, folk customs, date selection | work, school, government, business |
This is why Chinese New Year, Dragon Boat Festival, and Mid-Autumn Festival do not fall on the same Gregorian date every year. Their lunar dates are fixed, but their Gregorian dates shift because the two calendars are built differently.
Lunar Months, Lunar Days, and Leap Months
To read the Chinese Lunar Calendar, it helps to know the basic language of lunar months and lunar days.
| Concept | Chinese | Meaning |
|---|---|---|
| Lunar Month | 农历月 | a month based on the Moon cycle |
| Big Month | 大月 | a lunar month with 30 days |
| Small Month | 小月 | a lunar month with 29 days |
| Chu Yi | 初一 | the first day of a lunar month, near the new moon |
| Shi Wu | 十五 | the fifteenth day, near the full moon |
| San Shi | 三十 | the thirtieth day, only in a big month |
| Leap Month | 闰月 | an extra lunar month added in some years |
| Leap Sixth Month | 闰六月 | an added sixth lunar month after the regular sixth month |
A small month has no thirtieth day. This is why a lunar date can be confusing if someone assumes every month has 30 days. A person born on the thirtieth day of a lunar month may need to check the calendar carefully in later years.
Leap months create another layer. If a year has a leap sixth month, then that year has a regular sixth month and a leap sixth month. People may say there are “two sixth months” that year, but only one is the leap month.
For birthdays, zodiac signs, BaZi, or auspicious dates, use a reliable calendar, almanac, or converter instead of calculating lunar dates by hand.
The 24 Solar Terms in the Chinese Calendar
The 24 Solar Terms are based on the Sun, not the Moon. They divide the solar year into 24 seasonal points and mark changes in weather, climate, farming activity, and daily life. This is why the traditional calendar is called nongli (农历), or agricultural calendar.
| Season | Solar Terms Examples | Cultural Meaning |
|---|---|---|
| Spring | Start of Spring, Rain Water, Awakening of Insects, Spring Equinox, Qingming, Grain Rain | spring begins, rain increases, farming restarts, tomb sweeping |
| Summer | Start of Summer, Grain Buds, Grain in Ear, Summer Solstice, Minor Heat, Major Heat | crops grow, heat increases, summer reaches its peak |
| Autumn | Start of Autumn, End of Heat, White Dew, Autumn Equinox, Cold Dew, Frost’s Descent | heat fades, harvest season begins, nights cool |
| Winter | Start of Winter, Minor Snow, Major Snow, Winter Solstice, Minor Cold, Major Cold | cold deepens, winter reaches its turning point |
Some solar terms are also major cultural days. Qingming is used for tomb sweeping and ancestor remembrance. Winter Solstice is associated with family gathering and seasonal foods, such as dumplings in parts of northern China and tangyuan in parts of southern China.
Solar terms are more stable in Gregorian dates than lunar festivals. Qingming usually falls around April 4–5. Winter Solstice usually falls around December 21–23. This is because solar terms are based on the Sun’s position, not on lunar months.
The 24 Solar Terms also help connect the calendar with farming, seasonal food, and household customs. Sayings such as “Qingming rain falls one after another” or “Winter Solstice dumplings and Summer Solstice noodles” reflect this rhythm.
Chinese Calendar Festivals: Lunar Dates and Solar Terms
Chinese festivals are not all based on the same calendar rule. Some follow fixed lunar dates. Others are based on solar terms.
| Festival | Chinese | Calendar Basis | Cultural Meaning |
|---|---|---|---|
| Spring Festival / Chinese New Year | 春节 | first day of the first lunar month | New Year, reunion dinner, red envelopes, family visits |
| Lantern Festival | 元宵节 | fifteenth day of the first lunar month | lanterns, tangyuan, end of New Year celebrations |
| Qingming Festival | 清明节 | Qingming solar term | tomb sweeping, ancestor remembrance, spring outing |
| Dragon Boat Festival | 端午节 | fifth day of the fifth lunar month | Qu Yuan remembrance, dragon boat racing, zongzi |
| Qixi Festival | 七夕节 | seventh day of the seventh lunar month | Cowherd and Weaver Girl, romance, folk wishes |
| Zhongyuan Festival | 中元节 | fifteenth day of the seventh lunar month | ancestor rites, ghost festival customs |
| Mid-Autumn Festival | 中秋节 | fifteenth day of the eighth lunar month | full moon, reunion, mooncakes |
| Double Ninth Festival | 重阳节 | ninth day of the ninth lunar month | climbing heights, respect for elders |
| Winter Solstice | 冬至 | Winter Solstice solar term | family gathering, dumplings, tangyuan, seasonal turning point |
This distinction matters. Mid-Autumn Festival follows the fifteenth day of the eighth lunar month, so its Gregorian date changes each year. Qingming follows a solar term, so it usually stays around April 4–5.
For Chinese families, these dates tell people when to return home, honor ancestors, eat seasonal foods, visit relatives, or prepare offerings. The calendar is not only a timekeeping tool; it is a cultural rhythm.
Chinese Zodiac and the Lunar Calendar
The Chinese Zodiac is closely connected with the traditional calendar, but the year boundary can be confusing.
In daily life, most people switch zodiac signs at Chinese New Year. In BaZi and some professional fortune-telling systems, the boundary may be Li Chun (立春), or Start of Spring, rather than Chinese New Year.
| Usage Context | Common Boundary | How It Is Used |
|---|---|---|
| Public Zodiac Use | Chinese New Year | most common for everyday zodiac signs |
| Family And Folk Usage | Chinese New Year | used in New Year customs and casual zodiac identity |
| BaZi / Four Pillars | Li Chun / Start of Spring | often used for the year pillar in professional readings |
| Stem-Branch Calendar | solar-term boundary | connected with traditional calendrical calculation |
This is why people born in January or February need to be careful. If someone was born before Chinese New Year, their zodiac animal may belong to the previous year in common usage. If someone was born between Li Chun and Chinese New Year, a BaZi reader may handle the year differently from a casual zodiac website.
A practical rule: for ordinary zodiac identity, Chinese New Year is usually enough. For BaZi, stem-branch calculation, or professional destiny analysis, check whether the system uses Li Chun.
To understand the zodiac year connected with the traditional calendar, read our [Chinese Zodiac] guide. To understand the stem-branch system behind traditional dates, read our [Heavenly Stems And Earthly Branches] guide.
Lunar Birthdays and Everyday Use
The Chinese Lunar Calendar still appears in ordinary life, especially in families, festivals, and folk customs.
Many older Chinese people remember their lunar birthday more clearly than their Gregorian birthday. In some families, grandparents celebrate only the lunar birthday. In others, younger people may celebrate the Gregorian birthday while elders still follow the lunar date.
The lunar calendar is also used for:
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Family Birthdays: especially among older generations.
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Weddings: families may choose an auspicious date from the traditional calendar.
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Moving Homes: some people check the lunar date and almanac before moving.
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Business Openings: shops may select a lucky opening day.
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Ancestor Rituals: Qingming, Zhongyuan, Winter Solstice, and family memorial days.
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Temple Fairs And Worship: many local customs follow lunar dates.
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Seasonal Foods: spring pancakes at Start of Spring, qingtuan around Qingming, zongzi for Dragon Boat Festival, mooncakes for Mid-Autumn Festival, dumplings or tangyuan for Winter Solstice.
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Mobile Calendars: many Chinese phone calendars display the lunar date, zodiac year, solar terms, and sometimes almanac notes.
In modern China, people use the Gregorian calendar for flights, meetings, contracts, school schedules, and government dates. But when Spring Festival, Mid-Autumn Festival, Qingming, or a family elder’s birthday arrives, many families naturally return to the lunar rhythm.
Chinese Lunar Calendar and Fortune Telling
The Chinese Lunar Calendar is not a fortune-telling result by itself, but it is a time foundation for many traditional systems.
| System | How It Uses Traditional Calendar Time |
|---|---|
| BaZi | uses birth year, month, day, and hour through Heavenly Stems and Earthly Branches |
| Chinese Zodiac | uses the year animal, with boundary rules depending on public or professional use |
| Tai Sui | uses the annual zodiac and stem-branch year to identify caution years |
| Ze Ri / Auspicious Date Selection | selects dates for weddings, moving, opening, travel, or ceremonies |
| Huangli / Chinese Almanac | marks daily suitability, clashes, auspicious hours, and taboos |
| Feng Shui | uses annual and seasonal timing in some schools |
| Chinese Fortune Telling | uses calendar timing to interpret cycles, choices, and symbolic patterns |
BaZi readings need more than the lunar date. They require a traditional time structure based on year, month, day, and hour. Tai Sui, zodiac readings, and date selection also depend on correct year boundaries, stem-branch days, zodiac clashes, and almanac rules. A wrong lunar date, birth hour, or year boundary can change the reading.
To explore birth-time analysis based on traditional timekeeping, read our [BaZi] guide. To understand yearly caution and zodiac conflicts, read our [Tai Sui] guide. To understand how calendar timing appears in traditional readings, read our [Chinese Fortune Telling] guide.
How to Convert Gregorian Dates to Chinese Lunar Dates
Many people search for the Chinese Lunar Calendar because they want to convert a Gregorian date to a Chinese lunar date for birthdays, zodiac signs, BaZi, festivals, or anniversary dates. The user process is simple, even though the calculation behind it is complex.
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Know What You Are Converting
Are you checking a birthday, a festival, a zodiac sign, a BaZi chart, or an auspicious date? The purpose affects which details matter. -
Use A Reliable Converter Or Calendar
A phone calendar, official calendar table, reliable almanac, or trusted online converter is safer than hand calculation. -
Enter The Gregorian Date
Use the year, month, and day. For BaZi or professional readings, the birth hour and birthplace may also matter. -
Check The Lunar Year, Month, And Day
Pay attention to whether the date falls before or after Chinese New Year. -
Watch For Leap Months
If the date falls in a leap month, the calendar should clearly show “leap” before the month. -
Check Zodiac Boundary Rules
For casual zodiac identity, Chinese New Year is usually used. For BaZi, Li Chun may matter. -
Consider Time Zone For Birth Data
If someone was born outside China, a professional reading may need to consider local time, time zone, and conversion rules.
Important cautions:
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the same lunar birthday falls on different Gregorian dates each year;
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a leap month is a full extra lunar month, not a leap day;
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January and February births are most likely to cause zodiac-year confusion;
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Qingming and Winter Solstice are solar-term dates, not ordinary lunar dates.
For most readers, a reliable phone calendar, almanac, or converter is the safest method.
Common Mistakes About the Chinese Lunar Calendar
Most misunderstandings come from treating the Chinese Lunar Calendar as either a pure Moon calendar or a simple festival calendar.
| Mistake | Better Understanding |
|---|---|
| Thinking the Chinese Lunar Calendar is purely lunar | it is a lunisolar calendar using both the Moon and the Sun |
| Thinking it is always one month behind the Gregorian calendar | the relationship changes because the systems are different |
| Thinking Chinese New Year is on the same Gregorian date every year | it usually falls between January 21 and February 20 |
| Thinking zodiac signs change on January 1 | public usage follows Chinese New Year; BaZi may use Li Chun |
| Thinking a lunar birthday has the same Gregorian date every year | the Gregorian date changes each year |
| Thinking the 24 Solar Terms are Moon phases | they are based on the Sun |
| Thinking a leap month is like February 29 | a Chinese leap month is a full extra lunar month |
| Thinking Chinese New Year and Lunar New Year always mean the same thing | Lunar New Year is broader; Chinese New Year refers to the Chinese Spring Festival |
| Thinking Qingming is a normal lunar-date festival | Qingming follows a solar term |
| Thinking the almanac’s Yi / Ji rules are absolute commands | they are traditional references, not fixed rules for everyone |
Once you understand that the Chinese Lunar Calendar is lunisolar, the changing date of Chinese New Year, leap months, zodiac boundaries, and solar terms become much easier to understand.
Chinese Lunar Calendar vs Other Asian Lunar Calendars
Lunar New Year is a broader cultural term. Several Asian cultures celebrate traditional New Year festivals based on related lunisolar systems, but the customs and sometimes the dates can differ.
| Tradition | New Year Name | General Relationship To The Chinese Calendar |
|---|---|---|
| China | Spring Festival / Chinese New Year | the main Chinese cultural context |
| Vietnam | Tết Nguyên Đán | related lunisolar tradition, with different customs and sometimes date differences |
| Korea | Seollal | related lunisolar tradition, with Korean family rituals and customs |
| Japan | New Year on January 1 today | modern Japan uses the Gregorian New Year, though older traditions once followed the lunar calendar |
In English, “Lunar New Year” is useful across cultures. “Chinese New Year” or “Spring Festival” is more specific to the Chinese context. Chinese New Year is part of Lunar New Year traditions, but Lunar New Year is not only Chinese.
Is the Chinese Lunar Calendar Still Used Today?
Yes. The Chinese Lunar Calendar is still used today, but not as the main civil calendar. Modern China uses the Gregorian calendar for government dates, school calendars, work schedules, business contracts, transportation, and international communication.
The lunar calendar remains important for festivals, solar-term customs, family birthdays, zodiac years, ancestor rituals, auspicious dates, seasonal foods, folk religion, and traditional readings such as BaZi, Tai Sui, Huangli, and Feng Shui timing.
It has shifted from the main official calendar to a cultural calendar. In practice, it still shapes how Chinese families celebrate, remember, gather, eat, worship, and mark seasonal change.
How to Read a Chinese Lunar Calendar
A Chinese lunar calendar may show more than one kind of information. Some calendars only show lunar dates and solar terms. A Huangli (黄历), or Chinese almanac, may also show Yi / Ji, zodiac clashes, auspicious hours, and other traditional notes.
| Calendar Element | Chinese | What It Shows | Example |
|---|---|---|---|
| Lunar Month | 农历月 | the lunar month number or name | first month, second month, twelfth month |
| Zheng Yue | 正月 | the first lunar month | Chinese New Year month |
| La Yue | 腊月 | the twelfth lunar month | final lunar month before New Year |
| Lunar Day | 农历日 | the day inside the lunar month | Chu Yi, Shi Wu, San Shi |
| Leap Month | 闰月 | an extra lunar month | leap sixth month |
| Zodiac Year | 生肖年 | the year animal | Year of the Horse |
| Stem-Branch Year | 干支年 | the Heavenly Stem and Earthly Branch year | Bing Wu year |
| Solar Term | 节气 | seasonal solar marker | Qingming, Winter Solstice |
| Yi / Ji | 宜 / 忌 | almanac suitability and avoidance notes | suitable for marriage, avoid moving earth |
For most readers, the first things to check are the lunar month, lunar day, zodiac year, and solar term.
If you use a Huangli for date selection, treat Yi / Ji as traditional reference, not an absolute command. Many people check these notes for weddings, moving, or business openings, but practical needs, family schedules, law, weather, and professional advice still matter.
Final Thoughts
The Chinese Lunar Calendar is not a simple Moon calendar. It is a lunisolar system that uses lunar phases to organize months, the 24 Solar Terms to connect time with the Sun and seasons, and leap months to keep lunar years aligned with the solar year.
It explains why Chinese New Year changes in Gregorian dates, why Mid-Autumn Festival is always on the fifteenth day of the eighth lunar month, why zodiac boundaries can confuse people born in January or February, and why many Chinese families still care about lunar birthdays, ancestor rituals, and auspicious dates.
To understand the Chinese Lunar Calendar is to understand the rhythm behind Chinese festivals, family life, seasonal food, zodiac culture, BaZi, Tai Sui, and everyday folk customs.
FAQs About the Chinese Lunar Calendar
What is the Chinese lunar calendar?
The Chinese Lunar Calendar is the traditional Chinese calendar used for festivals, lunar birthdays, zodiac years, solar terms, ancestor rituals, auspicious dates, and folk customs. It is usually called a lunar calendar in English, but it is more accurately a lunisolar calendar.
Is the Chinese lunar calendar really lunar?
Not purely. It uses lunar phases to organize months, but it also uses the 24 Solar Terms and leap months to stay aligned with the solar year and the seasons.
What is the difference between the Chinese lunar calendar and the Gregorian calendar?
The Gregorian calendar is a solar calendar with fixed civil months. The Chinese Lunar Calendar is lunisolar: its months follow the Moon, while solar terms and leap months keep the calendar connected with the Sun and seasons.
Why does Chinese New Year change every year?
Chinese New Year is fixed on the first day of the first lunar month, but that lunar date corresponds to a different Gregorian date each year. It usually falls between January 21 and February 20.
What is a leap month in the Chinese calendar?
A leap month is an extra full lunar month added in some years to keep the lunar calendar aligned with the solar year. It is not the same as the Gregorian leap day on February 29.
What are the 24 Solar Terms?
The 24 Solar Terms are seasonal markers based on the Sun’s position. They include terms such as Start of Spring, Qingming, Summer Solstice, Autumn Equinox, Winter Solstice, and Major Cold. They guide farming, seasonal customs, and some festival timing.
Is the Chinese zodiac based on the lunar calendar?
In public usage, the Chinese Zodiac is usually linked with the lunar New Year. In BaZi and some professional systems, the year boundary may be Li Chun, or Start of Spring, instead of Chinese New Year.
How do I convert a Gregorian date to a Chinese lunar date?
Use a reliable lunar calendar, official conversion table, phone calendar, or online converter. Pay attention to leap months, January–February year boundaries, zodiac boundary rules, and time zone if the date is used for BaZi.
Do Chinese people still use the lunar calendar?
Yes. Daily work and government life use the Gregorian calendar, but the lunar calendar is still used for festivals, lunar birthdays, zodiac signs, ancestor rituals, solar terms, auspicious dates, and folk customs.
Is Chinese New Year the same as Lunar New Year?
Chinese New Year, also called Spring Festival, refers specifically to the Chinese New Year celebration. Lunar New Year is broader and can include Vietnamese, Korean, and other lunisolar New Year traditions.