Japanese calendar types have included a range of official and unofficial systems. At present, Japan uses the Gregorian calendar together with year designations stating the year of the reign of the current Emperor.
History
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The lunisolar Chinese calendar was introduced to Japan via Korea in the middle of the sixth century. After that, Japan calculated its calendar using various Chinese calendar procedures, and from 1685, using Japanese variations of the Chinese procedures. But in 1873, as part of Japan's Meiji period modernization, a calendar based on the solar Gregorian calendar was introduced. In Japan today, the old Chinese calendar is virtually ignored; celebrations of the Lunar New Year are thus limited to Chinese and other Asian immigrant communities.
Japan has had more than one system for designating years. including:
- The Chinese sexagenary cycle was introduced early into Japan. It was often used together with era names, as in the 1729 Ise calendar shown above, which is for "the 14th year of KyÅhÅ, tsuchi-no-to no tori", i.e., 己酉. Now, though, the cycle is seldom used except around New Year.
- The era name (å…ƒå·, gengÅ) system was also introduced from China, and has been in continuous use since AD 701. Since the TaishÅ Emperor's ascension in 1912, each emperor's reign has begun a new era; before 1868 era names were often also declared for other reasons. NengÅ are the official means of dating years in Japan, and virtually all government business is conducted using that system. It is also in general use in private and personal business.
- The Japanese imperial year (皇紀, kÅki, or 紀元 kigen) is based on the date of the legendary founding of Japan by Emperor Jimmu in 660 BC. It was first used in the official calendar in 1873. However, it never replaced era names, and since World War II has been abandoned.
- The Western Common Era (Anno Domini) (西暦, seireki) system has gradually come into common use since the Meiji period. Now, most people know it, as well as era names.
Official calendar
Years
The official dating system known as nengÅ (å¹´å·) (or, strictly speaking, gengÅ (å…ƒå·)), has been in use since the late 7th century. Years are numbered within regnal eras, which are named by the reigning Emperor. Beginning with Meiji (1868â€"1912), each reign has been one era, but many earlier Emperors decreed a new era upon any major event; the last pre-Meiji Emperor's reign (1846â€"1867) was split into seven eras, one of which lasted only one year. The nengÅ system remains in wide use, especially on official documents and government forms.
The imperial year system (kÅki) was used from 1872 to the Second World War. Imperial year 1 (KÅki 1) was the year when the legendary Emperor Jimmu founded Japan â€" 660 BC according to the Gregorian Calendar. Usage of kÅki dating can be a nationalist signal, pointing out that the history of Japan's imperial family is longer than that of Christianity, the basis of the Anno Domini (AD) system. KÅki 2600 (1940) was a special year. The 1940 Summer Olympics and Tokyo Expo were planned as anniversary events, but were canceled due to the Second Sino-Japanese War. The Japanese naval Zero Fighter was named after this year. After the Second World War, the United States occupied Japan, and stopped the use of kÅki by officials. Today, kÅki is rarely used, except in some judicial contexts.
The 1898 law determining the placement of leap years is officially based on the kÅki years, using a formula that is effectively equivalent to that of the Gregorian calendar: if the kÅki year number is evenly divisible by four, it is a leap year, unless the number minus 660 is evenly divisible by 100 and not by 400. Thus, for example, the year KÅki 2560 (AD 1900) is divisible by 4; but 2560 âˆ' 660 = 1900, which is evenly divisible by 100 and not by 400, so kÅki 2560 was not a leap year, just as in most of the rest of the world.
The present era, Reiwa, formally began on 1 May 2019. The name of the new era was announced by the Japanese government on 1 April 2019, a month prior to Naruhito's succession to the throne. The previous era, Heisei, came to an end on 30 April 2019, after Japan's former emperor, Akihito, abdicated the throne.
Seasons
See also "Seasonal days", below.
Months
The modern Japanese names for the months literally translate to "first month", "second month", and so on. The corresponding number is combined with the suffix 月 (-gatsu, "month"). The table below uses traditional numerals, but the use of Western numerals (ï¼'月, ï¼'月, ï¼"月 etc.) is common.
In addition, every month has a traditional name, still used by some in fields such as poetry; of the twelve, Shiwasu is still widely used today. The opening paragraph of a letter or the greeting in a speech might borrow one of these names to convey a sense of the season. Some, such as Yayoi and Satsuki, do double duty as given names (for women). These month names also appear from time to time on jidaigeki, contemporary television shows and movies set in the Edo period or earlier.
The old Japanese calendar was an adjusted lunar calendar based on the Chinese calendar, and the yearâ€"and with it the monthsâ€"started anywhere from about 3 to 7 weeks later than the modern year, so in historical contexts it is not entirely accurate to equate the first month with January.
Subdivisions of the month
Japan uses a seven-day week, aligned with the Western calendar. The seven-day week, with names for the days corresponding to the Latin system, was brought to Japan around ADÂ 800 with the Buddhist calendar. The system was used for astrological purposes and little else until 1876.
The names of the days come from the five visible planets, which in turn are named after the five Chinese elements (metal, wood, water, fire, earth), and from the moon and sun (yin and yang). On the origin of the names of the days of the week, also see East Asian Seven Luminaries.
Sunday and Saturday are regarded as "Western style take-a-rest days". Since the late 19th century, Sunday has been regarded as a "full-time holiday", and Saturday a half-time holiday (åŠãƒ‰ãƒ³). These holidays have no religious meaning (except those who believe in Christianity or Judaism). Many Japanese retailers do not close on Saturdays or Sundays, because many office workers and their families are expected to visit the shops during the weekend. An old Imperial Japanese Navy song (月月ç«æ°´æœ¨é‡'é‡') says "Mon Mon Tue Wed Thu Fri Fri!" which means "We work throughout the entire week."
Japanese people also use 10-day periods called jun (æ—¬). Each month is divided roughly into three 10-day periods:
- The first (from the 1st to the 10th) is jÅjun (上旬, upper jun)
- The second (from the 11th to the 20th), chÅ«jun (ä¸æ—¬, middle jun)
- The last (from the 21st to the end of the month), gejun (下旬, lower jun).
These are frequently used to indicate approximate times, for example, "the temperatures are typical of the jÅjun of April"; "a vote on a bill is expected during the gejun of this month."
Days of the month
Each day of the month has a semi-systematic name. The days generally use kun (native Japanese) numeral readings up to ten, and thereafter on (Chinese-derived) readings, but there are some irregularities. The table below shows dates written with traditional numerals, but use of Arabic numerals (ï¼'æ—¥, ï¼'æ—¥, ï¼"æ—¥, etc.) is extremely common in everyday communication, almost the norm.
Tsuitachi is a worn-down form of tsuki-tachi (月立ã¡), which means "the month beginning". The last day of the month was called tsugomori, which means "Moon hidden". This classical word comes from the tradition of the lunisolar calendar.
The 30th was also called misoka, just as the 20th is called hatsuka. Nowadays, the terms for the numbers 28â€"31 plus nichi are much more common. However, misoka is much used in contracts, etc., specifying that a payment should be made on or by the last day of the month, whatever the number is. New Year's Eve is known as ÅŒmisoka (大晦日, big 30th), and that term is still in use.
There is traditional belief that some days are lucky (kichijitsu) or unlucky. For example, there are some who will avoid beginning something on an unlucky day.
National holidays
After World War II, the names of Japanese national holidays were completely changed because of the secular state principle (Article 20, The Constitution of Japan). Although many of them actually originated from Shinto, Buddhism and important events relating to the Japanese imperial family, it is not easy to understand the original meanings from the superficial and vague official names.
Notes: Single days between two national holidays are taken as a bank holiday. This applies to May 4, which is a holiday each year. When a national holiday falls on a Sunday the next day that is not a holiday (usually a Monday) is taken as a holiday.
- †Traditional date on which according to legend Emperor Jimmu founded Japan in 660 BC.
- * Part of Golden Week.
Timeline of changes to national holidays
- 1948: The following national holidays were introduced: New Year's Day, Coming-of-Age Day, Constitution Memorial Day, Children's Day, Autumnal Equinox Day, Culture Day, Labour Thanksgiving Day.
- 1966: Health and Sports Day was introduced in memory of the 1964 Tokyo Olympics. Vernal Equinox Day was also introduced.
- 1985: Reform to the national holiday law made May 4, sandwiched between two other national holidays, also a holiday.
- 1989: After the ShÅwa Emperor died on January 7, the Emperor's Birthday became December 23 and Greenery Day took the place of the former Emperor's birthday.
- 2000, 2003: Happy Monday System (ãƒãƒƒãƒ"ーマンデー制度, HappÄ« MandÄ" Seido) moved several holidays to Monday. Starting with 2000: Coming-of-Age Day (formerly January 15) and Health and Sports Day (formerly October 10). Starting with 2003: Marine Day (formerly July 20) and Respect for the Aged Day (formerly September 15).
- 2005, 2007: According to a May 2005 decision, starting with 2007 Greenery Day will be moved from April 29 to May 4 replacing a generic national holiday (国æ°'ã®ä¼'æ—¥, kokumin no kyÅ«jitsu) that existed after the 1985 reform, while April 29 will be known as ShÅwa Day.
- 2009: September 22 may become sandwiched between two holidays, which would make this day a national holiday.
- 2014: Mountain Day established as a new holiday, to be observed starting 2016
- 2019: Emperor's Birthday not celebrated. The final celebration of Emperor's Birthday during the Heisei era took place on December 23, 2018, the birthday of Akihito. After the start of the Reiwa era on 1 May 2019, the next celebration of Emperor's Birthday is expected to take place on or around 23 February 2020, the birthday of the reigning Emperor Naruhito (as Naruhito's birthday falls on a Sunday in 2020, the official public holiday is expected to be celebrated on Monday, 24 February 2020 instead).
Customary issues in modern Japan
Gregorian months and the "One-Month Delay"
In contrast to other East Asian countries such as China, Vietnam, Korea and Mongolia, Japan has almost completely forgotten the Chinese calendar. Since 1876, January has been officially regarded as the "first month" even when setting the date of Japanese traditional folklore events (other months are the same: February as the second month, March as the third, and so on). But this system often brings a strong seasonal sense of gap since the event is 3 to 7 weeks earlier than in the traditional calendar. Modern Japanese culture has invented a kind of "compromised" way of setting dates for festivals called Tsuki-okure ("One-Month Delay") or Chūreki ("The Eclectic Calendar"). The festival is celebrated just one solar calendar month later than the date on the Gregorian calendar. For example, the Buddhist festival of Obon was the 15th day of the 7th month. Many places the religious services are held on July 15. However, in some areas, the rites are normally held on August 15, which is more seasonally close to the old calendar. (The general term "Obon holiday" always refers to the middle of August.) Although this is just de facto and customary, it is broadly used when setting the dates of many folklore events and religious festivals. But Japanese New Year is the great exception. The date of Japanese New Year is always January 1.
Seasonal days
Some days have special names to mark the change in seasons. The 24 sekki (Hanyu Pinyin: ÈrshÃsì Jiéqì; Japanese: 二å四節気; rÅmaji: nijÅ«shi sekki) are days that divide the solar year into twenty four equal sections. Zassetsu (é›'節) is a collective term for the seasonal days other than the 24 sekki. 72 KÅ (七å二候, ShichijÅ«ni kÅ) days are made from dividing the 24 sekki of a year further by three. These were named based upon the climate of Northern China, so many of the names do not fit in with the climate of Japanese archipelago. But some of these names, such as Shunbun, RisshÅ« and TÅji, are still used quite frequently in everyday life in Japan.
The 24 sekki
Dates can vary by one day either way.
- Risshun (立春): February 4â€"Beginning of spring
- Usui (雨水): February 19â€"Rain water
- Keichitsu (å•"蟄): March 5â€"Awakening of hibernated (insects)
- Shunbun (春分): March 20â€"Vernal equinox, middle of spring
- Seimei (清明): April 5â€"Clear and bright
- Kokuu (穀雨): April 20â€"Grain rain
- Rikka (ç«‹å¤): May 5â€"Beginning of summer
- ShÅman (å°æº€): May 21â€"Grain full
- BÅshu (èŠ'種): June 6â€"Grain in ear
- Geshi (å¤è‡³): June 21â€"Summer solstice, middle of summer
- ShÅsho (å°æš'): July 7â€"Small heat
- Taisho (大æš'): July 23â€"Large heat
- RisshÅ« (立秋): August 7â€"Beginning of autumn
- Shosho (処æš'): August 23â€"Limit of heat
- Hakuro (白露): September 7â€"White dew
- ShÅ«bun (秋分): September 23â€"Autumnal equinox, middle of autumn
- Kanro (å¯'露): October 8â€"Cold dew
- SÅkÅ (霜é™): October 23â€"Frost descent
- RittÅ (立冬): November 7â€"Beginning of winter
- ShÅsetsu (å°é›ª): November 22â€"Small snow
- Taisetsu (大雪): December 7â€"Large snow
- TÅji (冬至): December 22â€"Winter solstice, middle of winter
- ShÅkan (å°å¯'): January 5â€"Small Cold; or Kan no iri (å¯'ã®å…¥ã‚Š)â€"Entrance of the cold
- Daikan (大å¯'): January 20â€"Major cold
Zassetsu
Shanichi dates can vary by as much as 5 days. Chūgen has a fixed day. All other days can vary by one day.
Many zassetsu days occur in multiple seasons:
- Setsubun (節分) refers to the day before each season, or the eves of Risshun, Rikka, RishÅ«, and RittÅ; especially the eve of Risshun.
- DoyÅ (土ç"¨) refers to the 18 days before each season, especially the one before fall which is known as the hottest period of a year.
- Higan (彼岸) is the seven middle days of spring and autumn, with Shunbun at the middle of the seven days for spring, Shūbun for fall.
- Shanichi (社日) is the Tsuchinoe (戊) day closest to Shunbun (middle of spring) or Shūbun (middle of fall), which can be as much as 5 days before to 4 days after Shunbun/Shūbun.
Seasonal festivals
The following are known as the five seasonal festivals (ç¯€å¥ sekku, also äº"ç¯€å¥ gosekku). The sekku were made official holidays during Edo period on Chinese lunisolar calendar. The dates of these festivals are confused nowadays; some on the Gregorian calendar, others on "Tsuki-okure".
- 7th day of the 1st month: 人日 (Jinjitsu), 七è‰ã®ç¯€å¥ (Nanakusa no sekku) held on 7 January
- 3rd day of the 3rd month: 上巳 (JÅshi), 桃ã®ç¯€å¥ (Momo no sekku) held on 3 March in many areas, but in some area on 3 April
- é››ç¥ã‚Š (Hina matsuri), Girls' Day.
- 5th day of the 5th month: Tango (端åˆ): mostly held on 5 May
- 端åˆã®ç¯€å¥ (Tango no sekku), è–è'²ã®ç¯€å¥ (Ayame no sekku)
- Boys' Day. Overlaps with the national holiday Children's Day.
- 7th day of the 7th month: 七夕 (Shichiseki, Tanabata), 星ç¥ã‚Š (Hoshi matsuri ) held on 7 July in many areas, but in northern Japan held on 7 August (e.g. in Sendai)
- 9th day of the 9th month: é‡é™½ (ChÅyÅ), èŠã®ç¯€å¥ (Kiku no sekku) almost out of vogue today
Not sekku:
- January 1: Japanese New Year
- August 15: Obon â€" the date is "Tsuki-okure". In central Tokyo Obon is held on July 15 (The local culture of Tokyo tends to dislike Tsuki-okure custom.)
- December 31: ÅŒmisoka
RokuyÅ
The rokuyÅ (å…曜) are a series of six days calculated from the date of Chinese calendar that supposedly predict whether there will be good or bad fortune during that day. The rokuyÅ are commonly found on Japanese calendars and are often used to plan weddings and funerals, though most people ignore them in ordinary life. The rokuyÅ are also known as the rokki (å…è¼). In order, they are:
The rokuyÅ days are easily calculated from the Japanese lunisolar calendar. The first day of the first month is always senshÅ, with the days following in the order given above until the end of the month. Thus, the 2nd day is tomobiki, the 3rd is senbu, and so on. The 1st day of the 2nd month restarts the sequence at tomobiki. The 3rd month restarts at senbu, and so on for each month. The latter six months repeat the patterns of the first six, so the 1st of the 7th is senshÅ, the 1st of the 12th is shakkÅ and the moon-viewing day on the 15th of the 8th is always butsumetsu.
This system did not become popular in Japan until the end of the Edo period.
April 1
The first day of April has broad significance in Japan. It marks the beginning of the government's fiscal year. Many corporations follow suit. In addition, corporations often form or merge on that date. In recent years, municipalities have preferred it for mergers. On this date, many new employees begin their jobs, and it is the start of many real-estate leases. The school year begins on April 1.
See also
- East Asian age reckoning
- Jikkan JÅ«nishi
- List of kigo
References
External links
- Rokuyo â€" Lucky and Unlucky Days of the Japanese Calendar in Japanese
- National Diet Library, "The Japanese Calendar"
- The Lunar Calendar in Japan
- The Japanese Lunar Calendar Mechanics of the Japanese lunar calendar and hints on using NengoCalc (see below)
- Koyomi no page in Japanese
- Koyomi no hanashi in Japanese
- RokuyÅ calculator in Japanese
- RokuyÅ calendar in English
- Convert Western Years to Japanese Years converts Gregorian calendar years to Japanese Emperor Era years (known as nengo)
- Japanese Year Dates Detailed explanations of Reign years, Era years, Cyclic years, Western years, Imperial years
- NengoCalc (Tool for converting Japanese dates into Western equivalents)
- This Year in Japan Shows what the current year in Japan is
- Convert a Western year into a Japanese year (sci.lang.Japan FAQ pages)
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