Chinese calendar

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Jiǔyuè, Bǐngshēnnián
廿 三
Sun, Oct 23, 2016
Su Mo Tu We Th Fr Sa
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
2 ke 1 fen, p.wush
12:29:12 52:01
Ruler-style calendar for 2017:
Gregorian calendar vs Chinese calendar

The traditional Chinese calendar is a lunisolar calendar which reckons years, months and days according to astronomical phenomena. It is used for traditional activities in China and overseas Chinese communities. It determines the dates of traditional Chinese holidays, and guides Chinese people in selecting the luckiest days for weddings, funerals, moving, or beginning a business.

In the Chinese calendar, the days begin and end at midnight. The months begin on the day with the dark (new) moon. The years begin with the dark moon near the midpoint between winter solstice and spring equinox. The solar terms are the important components of the Chinese calendar. There are one to three solar terms within a month.

The present traditional Chinese calendar is the product of centuries of evolution. Many astronomical and seasonal factors were added by ancient scientists, and people can reckon the date of natural phenomena such as the moon phase and tide upon the Chinese calendar. The Chinese calendar has over 100 variants, whose characteristics reflect the calendar's evolutionary path. As with Chinese characters, different variants are used in different parts of the Chinese cultural sphere. In Korea, Vietnam, and the Ryukyu Islands, the Chinese calendar was adopted completely. In Japan, the Chinese calendar was used before the Edo period, and the later Japanese calendar used the algorithm of the Chinese calendar.

The official calendar in China is the Gregorian calendar, but the traditional Chinese calendar still plays an important role there. The Chinese calendar is known officially as the Farming Calendar (traditional Chinese: 農曆; simplified Chinese: 农历; pinyin: Nónglì), but is often referred to by other names, such as the Former Calendar (traditional Chinese: 舊曆; simplified Chinese: 旧历; pinyin: Jiùlì), the Traditional Calendar (traditional Chinese: 老曆; simplified Chinese: 老历; pinyin: Lǎolì), or the Lunar Calendar (traditional Chinese: 陰曆; simplified Chinese: 阴历; pinyin: Yīnlì).



The calendar is a year, month and date frame. The key elements are day, synodic month, solar year. The Chinese calendar is a little more complex system.

Contrast between calendars
Chinese calendar Indian calendar Jewish calendar Islamic calendar Persian calendar Gregorian calendar
day midnight to next sunrise to next sunset to next sunset to next midnight to next midnight to next
phase about 59/60 days - 1/30 month - - - -
vacant date - phase w/o sunrise - - - -
lunar month dark moon to next dark moon/full moon to next new moon to next new moon to next - -
solar month (sign of zodiac) about 307/16 days 30° ecliptic 1/12 solar year - - 29~31 days 28~31 days
solar year about 127/19 months winter solstice to next vernal exquinox to next vernal exquinox to next - vernal exquinox to next vernal exquinox to next
intercalary month month w/o zodiac entering month w/o zodiac entering the 12th month of leap year - - -
calendric year 12/13 lunar months
(offset 2 months)
12/13 lunar months 12/13 lunar months 12 lunar months 12 solar months 12 solar months
(offset -2 solar months)
influence profound influence in Eastern Asia profound influence in south Asia Israel official calendar profound influence in Islamic world official calendar in Iran and Afghan official calendar in most countries


Several coding systems are used for some special circumstances in order to avoid ambiguity, such as continuous day or year count.

  • The heavenly stems is a decimal system. The characters of the heavenly stems are: jiǎ, yǐ, bǐng, dīng, wù, jǐ, gēng, xīn, rén, guì (Chinese: 甲乙丙丁戊己庚辛壬癸).
The earthly branches may be labeled as decimal number: 1-jiǎ, 2-yǐ, 3-bǐng, 4-dīng, 5-wù, 6-jǐ, 7-gēng, 8-xīn, 9-rén, 0-guì
  • The earthly branches is a duodecimal system. The characters of the earthly branches are: zǐ, chǒu, yín, mǎo, chén, sì, wǔ, wèi, shēn, yǒu, xū, hài (Chinese: 子丑寅卯辰巳午未申酉戌亥). The earthly branches are used to mark the shí and climate terms usually.
The earthly branches may be labeled as duodecimal number: z-zǐ, 0-chǒu, 1-yín, 2-mǎo, 3-chén, 4-sì, 5-wǔ, 6-wèi, 7-shēn, 8-yǒu, 9-xū, x-hài

Time system[edit]

Explanatory Chart for Chinese time

Currently, people use hour-minute-second system to describe time. In ancient china, people use the shi-ke system to describe the daytime, and the geng-dian system to describe the time at night. For example:

The Chinese standard time is 12:29:12, or 52:01(2 ke 1 fen, p.wush).

In the Chinese calendar, the days begin at midnight and end at the next midnight, but people tend to regard the days as beginning at dawn.

  • shi-ke system
A day is divided into 100 centidays by kes(the scales), or into 12 dual-hours by 12 shis, which are named with 12 earthly branches.
In the earlier stage, the time expression is sss initial, sss 1 ke,..., sss 8 ke, such as wush 3 ke(the third ke after wush)
After Tang dynasty, the time expression is pre-sss initial, pre-sss 1 ke,..., pre-sss 4 ke, sss initial, sss 1 ke,..., sss 4 ke, such as prewush 3 ke(the third ke of wush), yinsh 4 ke(the fourth ke after yinsh)
For the calendar convenience, A day is divided into 6000 fens. 1 centiday = 60 fens, 1 fen = 14.4 seconds.
  • geng-dian system
A day is divided into 10 decidays by gengs(The midnight is sang, and each deciday is divided by 5 dians(points).
The time expression is ggg, ggg 1 point,..., ggg 5 point, such as sang 2 point(the second point after sang).
Among a year, the night length is inconstant. At 35°N, it's about 60% at the winter solstice, and about 40% at the summer solstice. So, the night gengs starts from a time between dawn and yig, and end at a time between wug and morn
  • 16-parts system
At pre-Qin and Qin-Han, a day was divided into 16 parts from the cock time(3:00; 4:15 / sig 1 point 50 fen). The 16-parts system is established for calendar convinience, for:
A season is about 91 days and 5 parts, and a solar month is about 30 days and 7 parts.
A couple of months is about 59 days and a part.


For more information on the adaption of seven-day week, see Names of the days of the week § East_Asian_tradition.

The Chinese seem to have adopted the seven-day week from the Hellenistic system by the 4th century, although by which route is not entirely clear. It was again transmitted to China in the 8th century by Manichaeans, via the country of Kang (a Central Asian polity near Samarkand).[1][a][b] It is the most predominately used system in modern China.

Other than the seven-day week system, in ancient China, the days were grouped into 10-day weeks with the stems, 12-day weeks with the branches, or 9/10-day weeks(Chinese: ; pinyin: xún) with the date in the month.

The ten-day week was used in antiquity (reportedly as early as in the Bronze Age Xia Dynasty).[2]

The law in the Han Dynasty (206 BC – AD 220) required officials of the empire to rest every five days, called mu (沐), while it was changed into 10 days in the Tang Dynasty (AD 618 – 907), called huan (澣/浣) or xún (旬).

Months were almost three weeks long (alternating 29 and 30 days to keep in line with the lunation). As a practice, the months are divided into 3 xún. The first 10 days is the early xún (Chinese: 上旬), the middle 10 days is the mid xún (Chinese: 中旬), and the last 9 or 10 days is the late xún (Chinese: 下旬).

Markets in Japan followed the Chinese jun (旬) system; see Japanese calendar. In Korea, it was called "Sun" (순,旬).


Month is the time between the dark moon. In the early days, the month length was estimated, and balanced. In general, 15-months-cycles and 17-months-cycles alternated for compliance with the synodic month.

The 15-months-cycle is 30,29,30,29,30,29,30,29,30,29,30,29,30,29,30
The 17-months-cycle is 30,29,30,29,30,29,30,29,30,29,30,29,30,29,30,29,30

In different ages, the calendar use different major cycle, which contains several 15-months-cycles and 17-months-cycle. The synodic month of Taichu calendar is 2943/81 days, so the major cycle contains three 17-months-cycles and two 15-months-cycles.

In 7th century, the Wùyín Yuán Calendar of Tang dynasty in 7th century, the month length was determined by the real synodic month for the first time, instead of the cycling method, which mean month lengths is determined by observation and prediction starting from Tang dynasty, except a few brief period of time.[c]

A month with 30 days is called a long month (Chinese: 大月), and a month with 29 days is called a short month (Chinese: 小月).
The days of the month are numbered beginning with 1, and in Chinese the day's number is always written with two characters,
such as Chūyī (Chinese: 初一) for 1, Shíwǔ (Chinese: 十五) for 15, and Niànsān (Chinese: 廿三) for 23.

Because astronomical observation is used to determine month length, date of the Chinese calendar corresponds to the moon phase.

The first day of each month is the dark moon.
In the 7th or 8th day of each month, the first quarter moon is visible in the afternoon and early evening.
In the 15th or 16th day of each month, the full moon is visible all night.
In the 22nd or 23rd day of each month, the last quarter moon is visible late at night and in the morning.

As the beginning of every month is determined by the time when the new moon occur, thus other countries who have adopted the calendar and use time standard that are different from China to calculate their own version of the calendar could result in deviation. For instance, the first new moon in the year 1968 in Gregorian calendar happened in UTC Jan 29 16:29, which would translate to Jan 29 23:29 in UTC+7 timezone (which is what North Vietnam used to calculate their Vietnamese calendar) while it would be Jan 30 00:15 based on the longitude of Beijing (as used by South Vietnam at the time), causing the two countries celebrate Tết holiday in different date that year and result in asynchronized attacks in Tet Offensive.[3]

Solar year and solar term[edit]

See also: Solar term
Solar term vs Zodiac

The solar year(traditional Chinese: ; simplified Chinese: ; pinyin: Suì) is the time between the winter solstices. The solar year is divided into 24 solar terms.

In ancient China, the solar year and solar terms were estimated and balanced, and the solar term is just the 1/24 of the solar year, about 157/32 days.

Starting from the 17th century, when the Shixian Calendar of Qing dynasty was adopted, the solar year is determined by the real tropical year instead, and the solar terms correspond to intervals of 15° along the ecliptic.

Different version of traditional Chinese calendar might have different average year length. For instance, one solar year of Taichu calendar, which were implemented in 1st century BC, is 365385/1539 days, while one solar year of Shoushi calendar, which were implemented in 13th century, is 36597/400 days, which is the same as the Gregorian calendar.

Couples of solar terms are climate terms(solar months). The first of each couples is "pre-climate" (traditional Chinese: 節氣; simplified Chinese: 节气; pinyin: Jiéqì), and the second of the each couple is "mid-climate" (traditional Chinese: 中氣; simplified Chinese: 中气; pinyin: Zhōngqì).

  1. FTC小寒 First Term of Cold Season
  2. STC大寒 Second Term of Cold Season
  3. VC立春 Vernal commence
  4. LTC雨水 Last Term of Cold Season(惊蛰)
  5. FTR惊蛰 First Term of Rainy Season(雨水)
  6. VE春分 Vernal Equinox
  7. STR清明 Second Term of Rainy Season(谷雨)
  8. LTR谷雨 Last Term of Rainy Season(清明)
  9. SC立夏 Summer commence
  10. FTG小满 First Term of Growing Season
  11. STG芒种 Second Term of Growing Season
  12. SS夏至 Summer Solstice
  13. FTH小暑 First Term of Hot Season
  14. STH大暑 Second Term of Hot Season
  15. AC立秋 Autumn Commence
  16. LTH处暑 Last Term of Hot Season
  17. FTD白露 First Term of Dew Season
  18. AE秋分 Autumn Equinox
  19. STD寒露 Second Term of Dew Season
  20. LTD霜降 Last Term of Dew Season
  21. WC立冬 Winter Commence
  22. FTS小雪 First Term of Snowy Season
  23. STS大雪 Second Term of Snowy Season
  24. SS冬至 Winter Solstice
Interactive chart of the dates of the start of the Chinese year from 1912 to 2101.

In general, there are 11 or 12 complete months and 2 incomplete months, which contains the winter solstice, in a solar year. The 11 mid-climates except the winter solstice are in the 11 or 12 complete months. The first month without a mid-climate is the leap month.

The complete months except the intercalary month, queues up from 0 to 10, and the incomplete months follows this queque, to be 11. The intercalary follows the queque number before by rule.

A solar year is about 3651/4 days, and 12 months is about 3543/8 days. So, the date of Chinese date will shift 11 days backward, or 18 days forward(there's a leap month in the year before).

The date of a Chinese date is always within the tolerance of ±15 days to a certain date, for example, the Chongyang Festival(9-09) is always within Oct 2 to Nov 1.
On the other hand, the Chinese date of a date is always within the tolerance of ±15 days to a certain Chinese date, for example, the National day of China is always within 7/7i-22 to 8-22.

The concert between the solar terms and the months, comply with the Metonic cycle in general. It means that the Chinese date gets the nearly date 19 years later, but the date near the leap month may be over a month.

A representative sequence of common and leap years is lcc lcc lcc lc lcc lcc lc, and intercalary months are about 8i, 6i, 4i, 2i, 7i, 5i, 3i in each section.

The intercalary month of the leap year between 1862 and 2108 in the Chinese calendar
Leap 1862~1880 ~1899 ~1918 ~1937 ~1956 ~1975 ~1994 ~2013 ~2032 ~2051 ~2070 ~2089 ~2108
0th year 7/8, 11 1862 8 1881 7 1900 8 1919 7 1938 7 1957 8 1976 8 1995 8 2014 9 2033 11 2052 8 2071 8 2090 8
3rd year 5/6 1865 5 1884 5 1903 5 1922 5 1941 6 1960 6 1979 6 1998 5 2017 6 2036 6 2055 6 2074 6 2093 6
6th year 4 1868 4 1887 4 1906 4 1925 4 1944 4 1963 4 1982 4 2001 4 2020 4 2039 5 2058 4 2077 4 2096 4
8/9th year 2/3, 10 1870 10 1890 2 1909 2 1928 2 1947 2 1966 3 1984 10 2004 3 2023 2 2042 2 2061 3 2080 3 2099 2
11th year 6/7 1873 6 1892 6 1911 6 1930 6 1949 7 1968 7 1987 6 2006 7 2025 6 2044 7 2063 7 2082 7 2101 7
14th year 5 1876 5 1895 5 1914 5 1933 5 1952 5 1971 5 1990 5 2009 5 2028 5 2047 5 2066 5 2085 5 2104 5
17th year 3/4, 2 1879 3 1898 3 1917 2 1936 3 1955 3 1974 4 1993 3 2012 4 2031 3 2050 3 2069 4 2088 4 2107 4

The month 9l/10l/11l/0l/1l is rare, and may be unified to the year junction, if we change the rules a little. For example:

1. The solar year is the time between the vernal commences, and the full moon after the vernal commences is the first of the year.
2. The first month is Zhengyue, the Last month is Layue; The month with vernal equinox is month 2, and the month with the first frost is month 9,
3. If there're two months before month 2, Zhengyue is month 0; else month 1, If there're four months after month 9, Layue is month 13; else month 12.
4. If there're nine months between month 2 and month 9, the first month without a mid-climate is a leap month(2l-8l).
5. For ordering convenience, the common months were recorded as 00-90 and 100-130(or 91-94 for shorter formula), the leap months were recorded as 21-81.

As intercalary month is determined by the first month without mid-climate and the exact time when each mid-climate happen would vary according to time zone, countries that have adopted the calendar but calculate with their own time could vary from the one used in China because of this. For instance, the 2012 FTG happened in UTC May 20 15:15, which would translate to May 20 23:15 in UTC+8, making FTG the mid-climate for the fourth month of that traditional Chinese year [April 21 ~ May 20 in Gregorian calendar], but in Korea it happen in May 21 00:15 in UTC+9, and as new moon take place in May 21 in that month, therefore the month before that would only consist of the SC solar term, lacking mid-climate. As a result, the month starting at April 21 would be an intercalary month in Korean calendar, but not in Chinese Calendar, and the intercalary month in Chinese calendar would start in the month after, in the fifth month starting from May 21, which would only consist of the solar term STG, while the month in Korean Calendar would have both FTG and STG solar term in it.

Civil year[edit]

The civil year starts from the first spring month(1), and ends at the last winter month(0/0i). The first and last month is called as Zhēngyuè (Chinese: 正月, capital month) and Làyuè (traditional Chinese: 臘月; simplified Chinese: 腊月, sacrificial month), and the other month is called according to the queque number(except that the 0th month is Shieryue, if the Layue is a leap month).

There are 12/13 months in each year. The years with 12 months are common years, or 353~355 days, is a common year. The years with 13 months, or 383~385 days, is a long year. There're two vernal Commences in a long years.

The years is numbered after a the reign title in ancient China, but the reign title is neglected after the founding of PRC. People use the stem-branches to demarcate the years. For example, the year from February 8, 2016 to January 27, 2017 is a Bǐngshēnnían, a common year with late Vernal Commences(Chinese: 年尾春) , 12 months or 355 days long.

Age recognition in China[edit]

In China, age for official use is based on the Gregorian calendar. For traditional use, age is based on the Chinese calendar. From birthday to the end of the year, it's one year old. After each New Year's Eve, add one year. "Ring out the old age and ring in the new one(traditional Chinese: 辭舊迎新; simplified Chinese: 辞旧迎新; pinyin: cíjiù yíngxīn)" is the literary express of New Year Ceremony. For example, if one's birthday is Làyuè 29th 2013, he is 2 years old at Zhēngyuè 1st 2014. On the other hand, people say months old instead of years old, if someone is too young. It's that the age sequence is "1 month old, 2 months old, ... 10 months old, 2 years old, 3 years old...".

After the actual age (traditional Chinese: 實歲; simplified Chinese: 实岁) was introduced into China, the Chinese traditional age was referred to as the nominal age (traditional Chinese: 虛歲; simplified Chinese: 虚岁). Divided the year into two halves by the birthday in the Chinese calendar,[4] the nominal age is 2 older than the actual age in the first half, and the nominal age is 1 older than the actual age in the second half (traditional Chinese: 前半年前虛兩歲,後半年虛一歲; simplified Chinese: 前半年前虚两岁,后半年虚一岁).[5]

Year number system[edit]

  • Era system
Main article: Chinese era name

In the ancient system, years were numbered from 1, beginning when a new emperor ascended the throne or the authorities announced the reign title. The first reign title was Jiànyuán (Chinese: 建元, from 140 BCE), and the last reign title was Xuāntǒng (traditional Chinese: 宣統; simplified Chinese: 宣统, from 1908 CE). The era system was abolished in 1912 CE, after which the Current Era or Republican era was used. The epoch of the Current Era is just the same as the reign title of Emperor Píng of Hàn Dynasty, Yuánshí (Chinese: 元始, the original of the era).

  • Continuous year numbering

Occasionally, nomenclature similar to that of the Christian era has been used, such as[6]

Anno Huángdì(Chinese: 黄帝紀年), referring to the beginning of the reign of the Yellow Emperor, 2698+AD=AH
Anno Yáo(Chinese: 唐尧紀年), referring to the beginning of the reign of Emperor Yao, 2156+AD=AY
Anno Gònghé(Chinese: 共和紀年), referring to the beginning of the Gonghe Regency, 841+AD=AG
Anno Confucius(Chinese: 孔子紀年), referring to the birth year of Confucius, 551+AD=AC
Anno Unity(Chinese: 統一紀年), referring to the beginning of the reign of Qin Shi Huang, 221+AD=AU

No reference date is universally accepted. On January 2, 1912, Sun Yat-sen declared a change to the official calendar and era. In his declaration, January 1, 1912 is called Shíyīyuè 13th, 4609 AH which implied an epoch of 2698 BC. The implication was adopted by many overseas Chinese communities outside Southeast Asia such as San Francisco's Chinatown.[7]

In the 17th century, the Jesuits tried to determine what year should be considered the epoch of the Han calendar. In his Sinicae historiae decas prima (first published in Munich in 1658), Martino Martini (1614–1661) dated the ascension of the Yellow Emperor to 2697 BC, but started the Chinese calendar with the reign of Fuxi, which he claimed started in 2952 BCE. Philippe Couplet's (1623–1693) Chronological table of Chinese monarchs (Tabula chronologica monarchiae sinicae; 1686) also gave the same date for the Yellow Emperor. The Jesuits' dates provoked great interest in Europe, where they were used for comparisons with Biblical chronology. Modern Chinese chronology has generally accepted Martini's dates, except that it usually places the reign of the Yellow Emperor in 2698 BC and omits the Yellow Emperor's predecessors Fuxi and Shennong, who are considered "too legendary to include".

Starting in 1903, radical publications started using the projected date of birth of the Yellow Emperor as the first year of the Han calendar. Different newspapers and magazines proposed different dates. Jiangsu, for example, counted 1905 as year 4396 (use an epoch of 2491 BCE), whereas the newspaper Ming Pao (traditional Chinese: 明報; simplified Chinese: 明报) reckoned 1905 as 4603 (use an epoch of 2698 BC). Liu Shipei (劉師培; 1884–1919) created the Yellow Emperor Calendar, now often used to calculate the date, to show the unbroken continuity of the Han race and Han culture from earliest times. Liu's calendar started with the birth of the Yellow Emperor, which he determined to be 2711 BC. There is no evidence that this calendar was used before the 20th century.[8] Liu calculated that the 1900 international expedition sent by the Eight-Nation Alliance to suppress the Boxer Rebellion entered Beijing in the 4611th year of the Yellow Emperor.

  • Calendric epoch

There is an epoch for each version of the Chinese calendar, which is called Lìyuán (traditional Chinese: 曆元; simplified Chinese: 历元). The epoch is the optimal origin of the calendar, and it's a Jiǎzǐrì, the first day of a lunar month, and the dark moon and solstice are just at the midnight (Chinese: 日得甲子夜半朔旦冬至). And tracing back to a perfect day, such as that day with the magical star sign, there's a supreme epoch (Chinese: 上元; pinyin: shàngyuán). The continuous year based on the supreme epoch is shàngyuán jīnián (traditional Chinese: 上元積年; simplified Chinese: 上元积年). More and more factors were added into the supreme epoch, and the shàngyuán jīnián became a huge number. So, the supreme epoch and shàngyuán jīnián were neglected from the Shòushí calendar.

  • Yuán-Huì-Yùn-Shì system

Shao Yong (Chinese: 邵雍 1011–1077), a philosopher, cosmologist, poet, and historian who greatly influenced the development of Neo-Confucianism in China, introduced a timing system in his The Ultimate which Manages the World (traditional Chinese: 皇極經世; simplified Chinese: 皇极经世; pinyin: Huángjíjīngshì) In his time system, 1 yuán (Chinese: ), which contains 12'9600 years, is a lifecycle of the world. Each yuán is divided into 12 huì (traditional Chinese: ; simplified Chinese: ). Each huì is divided into 30 yùn (traditional Chinese: ; simplified Chinese: ), and each yùn is divided into 12 shì (Chinese: ). So, each shì is equivalent to 30 years. The yuán-huì-yùn-shì corresponds with nián-yuè-rì-shí. So the yuán-huì-yùn-shì is called the major tend or the numbers of the heaven, and the nián-yuè-rì-shí is called the minor tend or the numbers of the earth.

The minor tend of the birth is adapted by people for predicting destiny or fate. The numbers of nián-yuè-rì-shí are encoded with stem-branches and show a form of Bāzì. The nián-yuè-rì-shí are called the Four Pillars of Destiny. For example, the Bāzì of the Qianlong Emperor is Xīnmǎo, Dīngyǒu, Gēngwǔ, Bǐngzǐ (辛卯、丁酉、庚午、丙子). Shào's Huángjíjīngshì recorded the history of the timing system from the first year of the 180th yùn or 2149th shì (HYSN 0630-0101, 2577 BC) and marked the year with the reign title from the Jiǎchénnián of the 2156th shì (HYSN 0630-0811, 2357 BC, Tángyáo 1, traditional Chinese: 唐堯元年; simplified Chinese: 唐尧元年). According to this timing system, 2014-1-31 is HYSN/YR 0712-1001/0101.

The table below shows the kinds of year number system along with correspondences to the Western (Gregorian) calendar. Alternatively, see this larger table of the full 60-year cycle.

CE RE1 AH2 HYSN3 bias4 month length CNY stem-branch the year of
1 2014 103 4711 0712-1001 0(9) 1010010101010 31-Jan 甲午(15) Yang wood horse
2 2015 104 4712 0712-1002 19 010001011010 19-Feb 乙未(26) Yin wood goat
3 2016 105 4713 0712-1003 9 010010110101 8-Feb 丙申(37) Yang Fire monkey
4 2017 106 4714 0712-1004 -3(6) 0010101101010 28-Jan 丁酉(48) Yin Fire rooster
5 2018 107 4715 0712-1005 16 010101101010 16-Feb 戊戌(59) Yang soil dog
6 2019 108 4716 0712-1006 5 011011010100 5-Feb 己亥(6X) Yin soil pig
7 2020 109 4717 0712-1007 -6(4) 1010110100010 25-Jan 庚子(7Y) Yang metal rat
8 2021 110 4718 0712-1008 12 010101010010 12-Feb 辛丑(80) Yin metal ox
9 2022 111 4719 0712-1009 2 101010010101 1-Feb 壬寅(91) Yang water tiger
10 2023 112 4720 0712-1010 -9(2) 1010010011010 22-Jan 癸卯(02) Yin water rabbit
11 2024 113 4721 0712-1011 10 001001011010 10-Feb 甲辰(13) Yang wood dragon
12 2025 114 4722 0712-1012 -1(6) 0001010110101 29-Jan 乙巳(24) Yin wood snack
13 2026 115 4723 0712-1013 18 000110110101 17-Feb 丙午(35) Yang Fire horse
14 2027 116 4724 0712-1014 7 001101101001 6-Feb 丁未(46) Yin Fire goat
15 2028 117 4725 0712-1015 -4(5) 0011011010001 26-Jan 戊申(57) Yang soil monkey
16 2029 118 4726 0712-1016 14 011010101001 13-Feb 己酉(68) Yin soil rooster
17 2030 119 4727 0712-1017 3 010101001010 3-Feb 庚戌(79) Yang metal dog
18 2031 120 4728 0712-1018 -7(3) 0101001010011 23-Jan 辛亥(8X) Yin metal pig
19 2032 121 4729 0712-1019 12 100100101101 11-Feb 壬子(9Y) Yang water rat

1 As of the beginning of the year. RE=the Republic of China Epoch
2 Huángdì era, using an epoch (year 1) of 2697 BC. Subtract 60 if using an epoch of 2637 BC. Add 1 if using an epoch of 2698 BC. 3 Timestamp according to Huángjíjīngshì, as a format of Huìyùn-Shìnián.
4 The bias between Layue 1st and January 1st, the number in () is the leap month.


The plum rains season is the rainy season during the late spring and early summer. The plum rains season starts on the first Bǐngrì after the Corn on Ear, and ends on the first Wèirì after the Moderate Heat.
The Sanfu days are the three sections from the first Gēng-day after the summer solstice. The first section is 10 days long, and named the fore fu (Chinese: 初伏; pinyin: chūfú). The second section is 10 or 20 days long, and named the mid fu (Chinese: 中伏; pinyin: zhōngfú). The last section is 10 days long from the first Gēng-day after autumn commences, and named the last fu (Chinese: 末伏; pinyin: mòfú).
The Shujiu cold days are the nine sections from the winter solstice. Each section is 9 days long. The shǔjǐu are the coldest days, and named with an ordinal number, such as Sìjǐu (Chinese: 四九).
The forecast of drought (traditional Chinese: 分龍; simplified Chinese: 分龙) is the key day which forecast if it's a drought year. the day is the first Chénrì after the Summer Solstice.


In the Sinosphere, the traditional festivals are upon the Chinese calendar (or local version of the Chinese calendar).

  • Major traditional holidays on fixed dates
Preliminary Eve (Chinese: 小年) is Làyuè 23 or 24. The following preliminary eve is at 2016-02-01 in north China, and at 2016-02-02 in south China.
New Year's Eve (Chinese: 除夕) is the last day of the year, Làyuè 29 or 30. The following New Year's Eve is at 2016-02-07, which is a statutory holiday.
New Year's Day (traditional Chinese: 春節; simplified Chinese: 春节) is Zhēngyuè 1.The following New Year's Day is at 2016-02-08, which is a statutory holiday.
Yuanxiao (Chinese: 元宵) is Zhēngyuè 15. The following Yuanxiao is at 2015-03-05
Shangsi (Chinese: 上巳) is Sānyuè 3. The following Shangsi is at 2015-04-21
Buddha's Birthday (traditional Chinese: 佛誕; simplified Chinese: 佛诞) is Sìyuè 8. The following Buddha's Birthday is at 2015-05-25
Duanwu (Chinese: 端午) is Wǔyuè 5. The following Duanwu is at 2015-06-20, which is a statutory holiday.
Qixi (Chinese: 七夕) is Qīyuè 7. The following Qixi is at 2015-08-20
Zhongyuan (Chinese: 中元) is Qīyuè 15. The following Zhongyuan is at 2015-08-28
Mid-autumn (Chinese: 中秋) is Bāyuè 15. The following Mid-autumn is at 2015-09-27, which is a statutory holiday.
Dual-yang (traditional Chinese: 重陽; simplified Chinese: 重阳) is Jiǔyuè 9. The following Dual-yang is at 2015-10-21
Xiayuan (Chinese: 下元) is Shíyuè 15. The following Xiayuan is at 2015-11-26
The Laba Festival (traditional Chinese: 臘八節; simplified Chinese: 腊八节) is Làyuè 8. The following Laba Festival is at 2016-01-17
  • Major traditional holidays on solar terms
Hanshi (Chinese: 寒食) is 105 days after the Winter Solstice. The following Hanshi is April 4 or Éryuè 16, 2015
The Qingming Festival (Chinese: 清明) is just on the day of the Bright and Clear. The following Qingming Festival is April 5 or Éryuè 17, 2015, which is a statutory holiday.
The Winter Solstice (Chinese: 冬至) is just on the day of the Winter Solstice. The following Winter Solstice is December 22 or Shíyīyuè 12, 2015.
The Vernal/Autumn Sacrifice (Chinese: 春社/秋社) is the fifth Wùrì after Vernal/Autumn Commences.
  • The traditional business festivals
In the old days, merchants used to open their stores from Zhēngyuè 5, and host a prayer service on that day. Zhēngyuè 5 is called God of Wealth's Day, and the prayer service is called God of Wealth is Welcome.
In the Fujian and Taiwan areas, businesses host a year-end dinner for employees at Làyuè 16. Làyuè 16 is called Weiya (Chinese: 尾牙).


Earlier Chinese calendars[edit]

Before the Spring and Autumn period, some Chinese calendars were solar calendars, and some Chinese calendars were lunar calendar.

Five Phases and Four Seasons Calendar

According to literature, the first version was the five-phases calendar (traditional Chinese: 五行曆; simplified Chinese: 五行历). In the five-phases calendar, the year is calibrated at the winter solstice. The day after 72 days is IA, and then GF, and then GH, and then CD. WS/IA/GF/GH/CD is the capital day(traditional Chinese: 行禦; simplified Chinese: 行御), and the 36 days before/after the capital day is the days of the season. A year day was intercalated before WS each 4 years. The days in the five-phases calendar are sequenced with the earthly branches, and the seasons are named with five-phases. The five-phases calendar is a phenological calendar.

The second version is the four-seasons calendar (traditional Chinese: 四時八節曆; simplified Chinese: 四时八节历). In the four-seasons calendar, the year is divided into four seasons, which is calibrated at WS, VE, SS, AE. The 46th day after WS/VE/SS/AE is Vernal Commences, Summer Commences, Autumn Commences, and Winter Commences, which is the beginning of the season. At that time, a day was divided into 16 shi . The season length is 91 days and 5 shi, and the accrued remnants became season days, which were intercalated before WS/AE/SS/VE/WS. The seasons are divided into three months, which length was 30 days and 7 shi each. The days in the four-seasons calendar are sequenced with the heavenly stems, and three sequences is about a month.

The day sequences(earthly branches sequence and heavenly stems sequence) of the five-phases and four-seasons calendar were mergined to adapt to the needs of interstates contacts, which made a far-reaching influence on the society and culture of China for over 3000 years.

The oracle bone records indicate that the calendar of Shang Dynasty were a lunar calendar, and the 12, 13, even 14 months were packed into a year roughly. Generally, the month after the winter solstice was named as the capital month(Chinese: 正月). The lunar calendar is calibrated at each dark moon.[9]

The history records that the Yellow Emperor's calendar (traditional Chinese: 黃帝曆; simplified Chinese: 黄帝历) is issued by Yellow Emperor, which is an early form of lunisolar calendar. In the Yellow Emperor's calendar, the length of two months is 59 days and a part(16 parts per day), and the year length is 12 months, 10 days and 14 parts. The leap day were intercalated each 32 months, and the leap months were intercalated each 2-3 years. The capital month is the winter solstice month.

Ancient Chinese calendars[edit]

Pre-Qin dynasty calendars[edit]

In Zhou dynasty, the authority issued the official calendar, which is a primitive lunisolar calendar. The year beginning of Zhou's calendar (traditional Chinese: 周曆; simplified Chinese: 周历) is the day with dark moon before the winter solstice, and the epoch is the Winter Solstice of a Dīngyǒu year.

Some remote vassal states issued their own calendars upon the rule of Zhou's calendar, such as:

The epoch of the Lu's calendar (traditional Chinese: 魯曆; simplified Chinese: 鲁历) is the winter solstice of a Gēngzǐ year.

During the Spring and autumn period and Warring States period, Some vassal states got out of control of Zhou, and issues their own official calendar, such as:

Jin issued the Xia's calendar (traditional Chinese: 夏曆; simplified Chinese: 夏历), with an year beginning of the day with the nearest darkmoon to the Vernal Commences. The epoch of Xia's calendar is the Vernal Commences of a Bǐngyíng year.
Qin issued the Zhuanxu's calendar (traditional Chinese: 顓頊曆; simplified Chinese: 颛顼历), with an year beginning of the day with the nearest darkmoon to the Winter Commences. The epoch of Zhuanxu's calendar is the Winter Commences of a Yǐmǎo year.
Song resumed the Yin's calendar (traditional Chinese: 殷曆; simplified Chinese: 殷历), with an year beginning of the day with the darkmoon after the Winter Solstice. The epoch of Yin's calendar is the Winter Solstice of a Jiǎyíng year.

These six calendars are called as the six ancient calendars (traditional Chinese: 古六曆; simplified Chinese: 古六历), and are the quarter remainder calendars (traditional Chinese: 四分曆; simplified Chinese: 四分历; pinyin: sìfēnlì). The months of these calendars begin on the day with the darkmoon, and there are 12 or 13 month within a year. The intercalary month is placed at the end of the year, and called as 13th month.

Calendar of the Qin and early Han dynasties[edit]

After Qin Shi Huang unified China under the Qin dynasty, the Qin's calendar (traditional Chinese: 秦曆; simplified Chinese: 秦历) was released. The Qin's calendar follows the rules of Zhuanxu's calendar, but the months order follows the Xia calendar. The months in the year are from the 10th month to the 9th month, and the intercalary month is called as the second Jiuyue (traditional Chinese: 後九月; simplified Chinese: 后九月). In the early Han dynasty, the Qin calendar continued to be used.

Taichu calendar and the calendars from the Han to Ming dynasties.[edit]

Emperor Wu of the Han dynasty introduced reforms in the halfway of his administration. His Taichu or Grand Inception Calendar (traditional Chinese: 太初曆; simplified Chinese: 太初历) introduced 24 solar terms which decides the month names. The solar year was defined as 365 385/1539 days, and divided into 24 solar terms. Each couples of solar terms are associated into 12 climate terms. The lunar month was defined as 29 43/81 days and named according to the closest climate term. The mid-climate in the month decides the month name, and a month without mid-climate is an intercalary.

The Taichu calendar established the frame of the Chinese calendar, Ever since then, there are over 100 official calendars in Chinese which are consecutive and follow the structure of Tàichū calendar both. There're several innovation in calendar calculation in the history of over 2100 years, such as:

In the Dàmíng Calendar released in Tiānjiān 9 (Chinese: 天监九年, 510) of the Liang dynasty, Zhu Chongzhi introduced the equation of equinoxes.
Actual syzygy method was adopted to decide the month from the Wùyín Yuán Calendar, which was released in Wǔdé 2 (Chinese: 武德二年, 619) of the Tang dynasty.
The real measured data was used in calendar calculation from Shòushí Calendar, which was released in Zhìyuán 18 (Chinese: 至元十八年, 1281) of the Yuan dynasty. And the tropical year is fixed at 365.2425 days, the same as the Gregorian calendar established in 1582.,[10] and derived spherical trigonometry.[11][12][13]

Modern Chinese calendars[edit]

Shíxiàn calendar[edit]

Main article: Shixian calendar

In the late Ming dynasty, Xu Guangqi and his colleagues worked out the new calendar upon the western astronomical arithmetic. But, the new calendar is not released before the end of the Ming dynasty. In the early Qing dynasty, Johann Adam Schall von Bell submitted the calendar to the Shunzhi Emperor. The Qing government released the calendar with a name, the Shíxiàn calendar, which means seasonal charter. In the Shíxiàn calendar, the solar terms each correspond to 15° along the ecliptic. It makes the Chinese calendar develop into an astronomical calendar. However, the length of the climate term near the perihelion is shorter than 30 days and there may be two mid-climate terms. The rule of the mid-climate terms decides the months, which is used for thousands years, lose its validity. The Shíxiàn calendar changed the rule to "decides the month in sequence, except the intercalary month".

Current Chinese calendar[edit]

The version of traditional Chinese calendar currently being used follows the rules of the Shíxiàn calendar, except that:

Changed the baseline from Beijing local time to Chinese Standard Time.
Adopted the real astronomical data against the theoretical calculation.

Proposals to optimize the Chinese calendar[edit]

To optimize the Chinese calendar, astronomers and astrophiles released many proposals. A typical proposal was released by Gao Pingzi (Chinese: 高平子; 1888-1970), a Chinese astronomer who was one of the founders of Purple Mountain Observatory. In his proposal, the month numbers are calculated before the dark moons and the solar terms were rounded to day. Upon his proposal, the month numbers are the same for the Chinese calendar upon different time zones.

Other practices[edit]

Among the ethnic groups inhabiting the mountain and plateau of southwestern China, and those living in the grasslands of northern China, the civil calendars shows a diversity of practice upon the characteristic phenology and culture, but they are based on the algorithm of the Chinese calendar of different periods, especially those of the Tang dynasty and pre-Qin dynasty period. For example, the Thai, Tibetan and Mongolian calendar is based on the algorithm of the Tang dynasty, while the Miao and Yi calendar is based on the algorithm of the pre-Qin dynasty period.

See also[edit]


  1. ^ The 4th-century date, according to the Cihai encyclopedia,[year needed] is due to a reference to Fan Ning (範寧/范宁), an astrologer of the Jin Dynasty.
  2. ^ The renewed adoption from Manichaeans in the 8th century (Tang Dynasty) is documented with the writings of the Chinese Buddhist monk Yi Jing and the Ceylonese Buddhist monk Bu Kong.
  3. ^ For instance the 19th year in Wùyín Yuán Calendar was expected to have 4 consecutive long month if the real synodic method is used, which made people at the time feel strange, and thus they revert to use cycling method to determine month length that year.


  1. ^ The Chinese encyclopaedia Cihai (辞海) under the entry for "seven luminaries calendar" (七曜历/七曜曆, qī yào lì) has: "method of recording days according to the seven luminaries [七曜 qī yào]. China normally observes the following order: Sun, Mon, Mars, Mercury, Jupiter, Venus, and Saturn. Seven days make one week, which is repeated in a cycle. Originated in ancient Babylon (or ancient Egypt according to one theory). Used by the Romans at the time of the 1st century AD, later transmitted to other countries. This method existed in China in the 4th century. It was also transmitted to China by Manichaeans in the 8th century from the country of Kang (康) in Central Asia." (translation after Bathrobe's Days of the Week in Chinese, Japanese & Vietnamese, plus Mongolian and Buryat (
  2. ^ 海上 (2005). 《中國人的歲時文化》. 岳麓書社. p. 195. ISBN 7-80665-620-0. 
  3. ^ Mathematics of the Chinese calendar, pp. 29–30.
  4. ^ The birthday is the day in each year that have the same date as the one on which someone was born. It's easy to confirm the birthday in the Chinese calendar for most people. But, if someone was born on the 30th of a month, his birthday is the last day of that month, and if someone is born in an intercalary month, his birthday is the day with the same date in the common month of the intercalary month.
  5. ^ The Gregorian calendar is a solar calendar and the Chinese calendar is a lunisolar calendar, and the birthday in the Chinese calendar is not same as in the Gregorian calendar always. so, there's a bias of +/-1 between the actual age in the Chinese calendar and in the Gregorian calendar. Thus, the nominal age in the Chinese calendar is 0~3 older than the actual age in the Gregorian calendar.
  6. ^ 《辽宁大学学报:哲社版》,2004/06,43~50页
  7. ^ Aslaksen, p.38.
  8. ^ Cohen (2012), p. 1, 4.
  9. ^
  10. ^ Asiapac Editorial. (2004). Origins of Chinese Science and Technology. Translated by Yang Liping and Y.N. Han. Singapore: Asiapac Books Pte. Ltd. ISBN 981-229-376-0, p.132.
  11. ^ Needham, Joseph. (1959). Science and Civilization in China: Volume 3, Mathematics and the Sciences of the Heavens and the Earth. Cambridge University Press., reprinted Taipei: Caves Books, Ltd.(1986), pp. 109–110.
  12. ^ Ho, Peng Yoke. (2000). Li, Qi, and Shu: An Introduction to Science and Civilization in China. Mineola: Dover Publications. ISBN 0-486-41445-0. p. 105.
  13. ^ Restivo, Sal. (1992). Mathematics in Society and History: Sociological Inquiries. Dordrecht: Kluwer Academic Publishers. ISBN 1-4020-0039-1. p. 32.

Further reading[edit]

External links[edit]


Calendar conversion[edit]