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The terms (AD) and before Christ (BC) are used to label or number years in the
Julian and
Gregorian calendar
The Gregorian calendar is the calendar used in most parts of the world. It was introduced in October 1582 by Pope Gregory XIII as a modification of, and replacement for, the Julian calendar. The principal change was to space leap years dif ...
s. The term is
Medieval Latin
Medieval Latin was the form of Literary Latin used in Roman Catholic Western Europe during the Middle Ages. In this region it served as the primary written language, though local languages were also written to varying degrees. Latin functioned ...
and means 'in the year of the Lord', but is often presented using "our Lord" instead of "the Lord", taken from the full original phrase "''anno Domini nostri Jesu Christi''", which translates to 'in the year of our Lord
Jesus Christ
Jesus, likely from he, יֵשׁוּעַ, translit=Yēšūaʿ, label=Hebrew/Aramaic ( AD 30 or 33), also referred to as Jesus Christ or Jesus of Nazareth (among other names and titles), was a first-century Jewish preacher and religious ...
'. The form "BC" is specific to
English
English usually refers to:
* English language
* English people
English may also refer to:
Peoples, culture, and language
* ''English'', an adjective for something of, from, or related to England
** English national ide ...
and equivalent abbreviations are used in other languages: the
Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
form is but is rarely seen.
This
calendar era
A calendar era is the period of time elapsed since one ''epoch'' of a calendar and, if it exists, before the next one. For example, it is the year as per the Gregorian calendar, which numbers its years in the Western Christian era (the Coptic ...
is based on the traditionally reckoned year of the
conception or
birth
Birth is the act or process of bearing or bringing forth offspring, also referred to in technical contexts as parturition. In mammals, the process is initiated by hormones which cause the muscular walls of the uterus to contract, expelling the f ...
of Jesus, ''AD'' counting years from the start of this
epoch
In chronology and periodization, an epoch or reference epoch is an instant in time chosen as the origin of a particular calendar era. The "epoch" serves as a reference point from which time is measured.
The moment of epoch is usually decided by ...
and ''BC'' denoting years before the start of the era. There is no
year zero
A year zero does not exist in the Anno Domini (AD) calendar year system commonly used to number years in the Gregorian calendar (nor in its predecessor, the Julian calendar); in this system, the year is followed directly by year . However, the ...
in this scheme; thus ''the year
AD 1
__NOTOC__
AD 1 or 1 CE is the epoch year for the Anno Domini (AD) Christian calendar era and also the 1st year of the Common Era (CE) and the 1st millennium and of the 1st century of the Christian and the common era. It was a common year sta ...
immediately follows the year
1 BC''. This dating system was devised in 525 by
Dionysius Exiguus
Dionysius Exiguus (Latin for "Dionysius the Humble", Greek: Διονύσιος; – ) was a 6th-century Eastern Roman monk born in Scythia Minor. He was a member of a community of Scythian monks concentrated in Tomis (present day Constanța, ...
, but was not widely used until the 9th century.
Traditionally, English follows Latin usage by placing the "AD" abbreviation before the year number, though it is also found after the year. In contrast, BC is always placed after the year number (for example: AD 70, but 70 BC), which preserves syntactic order. The abbreviation AD is also widely used after the number of a century or
millennium
A millennium (plural millennia or millenniums) is a period of one thousand years, sometimes called a kiloannum (ka), or kiloyear (ky). Normally, the word is used specifically for periods of a thousand years that begin at the starting point (ini ...
, as in "fourth century AD" or "second millennium AD" (although conservative usage formerly rejected such expressions). Because BC is the English abbreviation for ''Before Christ'', it is sometimes incorrectly concluded that AD means ''After Death'', i.e., after the death of Jesus, which would mean that the approximate 33 years commonly associated with the life of Jesus would be included in neither the BC nor the AD time scales.
Terminology that is viewed by some as being more neutral and inclusive of non-Christian people is to call this the Current or
Common Era
Common Era (CE) and Before the Common Era (BCE) are year notations for the Gregorian calendar (and its predecessor, the Julian calendar), the world's most widely used calendar era. Common Era and Before the Common Era are alternatives to the or ...
(abbreviated as CE), with the preceding years referred to as Before the Common or Current Era (BCE).
Astronomical year numbering
Astronomical year numbering is based on AD/ CE year numbering, but follows normal decimal integer numbering more strictly. Thus, it has a year 0; the years before that are designated with negative numbers and the years after that are designated ...
and
ISO 8601
ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data. It is maintained by the Geneva-based International Organization for Standardization (ISO) and was first published in 1988, w ...
avoid words or abbreviations related to Christianity, but use the same numbers for AD years (but not for BC years in the case of astronomical years; e.g., 1 BC is year 0, 45 BC is year −44).
History
The ''Anno Domini'' dating system was devised in 525 by
Dionysius Exiguus
Dionysius Exiguus (Latin for "Dionysius the Humble", Greek: Διονύσιος; – ) was a 6th-century Eastern Roman monk born in Scythia Minor. He was a member of a community of Scythian monks concentrated in Tomis (present day Constanța, ...
to enumerate the years in
his Easter table. His system was to replace the
Diocletian era that had been used in
older Easter tables, as he did not wish to continue the memory of a tyrant who
persecuted Christians. The last year of the old table, Diocletian
Anno Martyrium 247, was immediately followed by the first year of his table, Anno Domini 532. When Dionysius devised his table,
Julian calendar
The Julian calendar, proposed by Roman consul Julius Caesar in 46 BC, was a reform of the Roman calendar. It took effect on , by edict. It was designed with the aid of Greek mathematicians and astronomers such as Sosigenes of Alexandr ...
years were identified by naming the
consuls
A consul is an official representative of the government of one state in the territory of another, normally acting to assist and protect the citizens of the consul's own country, as well as to facilitate trade and friendship between the people ...
who held office that year— Dionysius himself stated that the "present year" was "the consulship of
Probus Junior", which was 525 years "since the incarnation of our Lord Jesus Christ". Thus, Dionysius implied that
Jesus' incarnation occurred 525 years earlier, without stating the specific year during which his birth or conception occurred. "However, nowhere in his exposition of his table does Dionysius relate his epoch to any other dating system, whether consulate,
Olympiad
An olympiad ( el, Ὀλυμπιάς, ''Olympiás'') is a period of four years, particularly those associated with the ancient and modern Olympic Games.
Although the ancient Olympics were established during Greece's Archaic Era, it was not until ...
,
year of the world, or
regnal year
A regnal year is a year of the reign of a sovereign, from the Latin ''regnum'' meaning kingdom, rule. Regnal years considered the date as an ordinal, not a cardinal number. For example, a monarch could have a first year of rule, a second year o ...
of Augustus; much less does he explain or justify the underlying date."
Bonnie J. Blackburn
Bonnie Jean Blackburn (born July 15, 1939, Albany, New York) is an American musicologist.
Career
She graduated in 1970 from the University of Chicago with a PhD. She studied with Edward Lowinsky and Howard Mayer Brown. She was lecturer at Nor ...
and
Leofranc Holford-Strevens
Leofranc Holford-Strevens (born 19 May 1946) is an English classical scholar, an authority on the works of Aulus Gellius, and a former reader for the Oxford University Press.
He is married to the American musicologist Bonnie J. Blackburn.
Car ...
briefly present arguments for 2 BC, 1 BC, or AD 1 as the year Dionysius intended for the
Nativity or
incarnation
Incarnation literally means ''embodied in flesh'' or ''taking on flesh''. It refers to the conception and the embodiment of a deity or spirit in some earthly form or the appearance of a god as a human. If capitalized, it is the union of divinit ...
. Among the sources of confusion are:
* In modern times,
incarnation
Incarnation literally means ''embodied in flesh'' or ''taking on flesh''. It refers to the conception and the embodiment of a deity or spirit in some earthly form or the appearance of a god as a human. If capitalized, it is the union of divinit ...
is synonymous with the conception, but some ancient writers, such as
Bede
Bede ( ; ang, Bǣda , ; 672/326 May 735), also known as Saint Bede, The Venerable Bede, and Bede the Venerable ( la, Beda Venerabilis), was an English monk at the monastery of St Peter and its companion monastery of St Paul in the Kingdom o ...
, considered incarnation to be synonymous with the Nativity.
* The civil or consular year began on 1 January, but the Diocletian year began on 29 August (30 August in the year before a Julian leap year).
* There were inaccuracies in the lists of consuls.
* There were confused summations of emperors' regnal years.
It is not known how Dionysius established the year of Jesus's birth. Two major theories are that Dionysius based his calculation on the
Gospel of Luke
The Gospel of Luke), or simply Luke (which is also its most common form of abbreviation). tells of the origins, birth, ministry, death, resurrection, and ascension of Jesus Christ. Together with the Acts of the Apostles, it makes up a two-volu ...
, which states that Jesus was "about thirty years old" shortly after "the fifteenth year of the reign of Tiberius Caesar", and hence subtracted thirty years from that date, or that Dionysius counted back 532 years from the first year of his new table.
It has also been speculated by Georges Declercq that Dionysius' desire to replace Diocletian years with a calendar based on the incarnation of Christ was intended to prevent people from believing the imminent
end of the world. At the time, it was believed by some that the
resurrection of the dead
General resurrection or universal resurrection is the belief in a resurrection of the dead, or resurrection from the dead ( Koine: , ''anastasis onnekron''; literally: "standing up again of the dead") by which most or all people who have died ...
and end of the world would occur 500 years after the birth of Jesus. The old ''
Anno Mundi
(from Latin "in the year of the world"; he, לבריאת העולם, Livryat haOlam, lit=to the creation of the world), abbreviated as AM or A.M., or Year After Creation, is a calendar era based on the biblical accounts of the creation o ...
'' calendar theoretically commenced with the
creation of the world based on information in the
Old Testament
The Old Testament (often abbreviated OT) is the first division of the Christian biblical canon, which is based primarily upon the 24 books of the Hebrew Bible or Tanakh, a collection of ancient religious Hebrew writings by the Israelites. The ...
. It was believed that, based on the ''Anno Mundi'' calendar, Jesus was born in the year 5500 (5500 years after the world was created) with the year 6000 of the ''Anno Mundi'' calendar marking the end of the world. ''Anno Mundi'' 6000 (approximately AD 500) was thus equated with the end of the world but this date had already passed in the time of Dionysius.
The "''Historia Brittonum''" attributed to Nennius written in the 9th century makes extensive use of the Anno Passionis (AP) dating system which was in common use as well as the newer AD dating system. The AP dating system took its start from 'The Year of The Passion'. It is generally accepted by experts there is a 27-year difference between AP and AD reference.
Popularization
The
Anglo-Saxon historian
Bede
Bede ( ; ang, Bǣda , ; 672/326 May 735), also known as Saint Bede, The Venerable Bede, and Bede the Venerable ( la, Beda Venerabilis), was an English monk at the monastery of St Peter and its companion monastery of St Paul in the Kingdom o ...
, who was familiar with the work of Dionysius Exiguus, used ''Anno Domini'' dating in his ''
Ecclesiastical History of the English People
The ''Ecclesiastical History of the English People'' ( la, Historia ecclesiastica gentis Anglorum), written by Bede in about AD 731, is a history of the Christian Churches in England, and of England generally; its main focus is on the conflict b ...
'', which he completed in AD 731. In the ''History'' he also used the
Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
phrase ''ante
..incarnationis dominicae tempus anno sexagesimo'' ("in the sixtieth year before the time of the Lord's incarnation"), which is equivalent to the English "before Christ", to identify years before the first year of this era. Both Dionysius and Bede regarded ''Anno Domini'' as beginning at the incarnation of
Jesus Christ
Jesus, likely from he, יֵשׁוּעַ, translit=Yēšūaʿ, label=Hebrew/Aramaic ( AD 30 or 33), also referred to as Jesus Christ or Jesus of Nazareth (among other names and titles), was a first-century Jewish preacher and religious ...
, but "the distinction between Incarnation and Nativity was not drawn until the late 9th century, when in some places the Incarnation epoch was identified with Christ's conception, i. e., the
Annunciation
The Annunciation (from Latin '), also referred to as the Annunciation to the Blessed Virgin Mary, the Annunciation of Our Lady, or the Annunciation of the Lord, is the Christian celebration of the biblical tale of the announcement by the ange ...
on March 25" ("Annunciation style" dating).
![Charlemagne Agostino Cornacchini Vatican 2](https://upload.wikimedia.org/wikipedia/commons/d/d0/Charlemagne_Agostino_Cornacchini_Vatican_2.jpg)
On the continent of Europe, ''Anno Domini'' was introduced as the era of choice of the
Carolingian Renaissance
The Carolingian Renaissance was the first of three medieval renaissances, a period of cultural activity in the Carolingian Empire. It occurred from the late 8th century to the 9th century, taking inspiration from the State church of the Roman Emp ...
by the English cleric and scholar
Alcuin
Alcuin of York (; la, Flaccus Albinus Alcuinus; 735 – 19 May 804) – also called Ealhwine, Alhwin, or Alchoin – was a scholar, clergyman, poet, and teacher from York, Northumbria. He was born around 735 and became the student o ...
in the late eighth century. Its endorsement by Emperor
Charlemagne
Charlemagne ( , ) or Charles the Great ( la, Carolus Magnus; german: Karl der Große; 2 April 747 – 28 January 814), a member of the Carolingian dynasty, was King of the Franks from 768, King of the Lombards from 774, and the first Holy ...
and
his successors popularizing the use of the epoch and spreading it throughout the
Carolingian Empire
The Carolingian Empire (800–888) was a large Frankish-dominated empire in western and central Europe during the Early Middle Ages. It was ruled by the Carolingian dynasty, which had ruled as kings of the Franks since 751 and as kings of the Lom ...
ultimately lies at the core of the system's prevalence. According to the
Catholic Encyclopedia
The ''Catholic Encyclopedia: An International Work of Reference on the Constitution, Doctrine, Discipline, and History of the Catholic Church'' (also referred to as the ''Old Catholic Encyclopedia'' and the ''Original Catholic Encyclopedia'') i ...
, popes continued to date documents according to
regnal years
A regnal year is a year of the reign of a sovereign, from the Latin ''regnum'' meaning kingdom, rule. Regnal years considered the date as an ordinal, not a cardinal number. For example, a monarch could have a first year of rule, a second year of ...
for some time, but usage of AD gradually became more common in Catholic countries from the 11th to the 14th centuries.
[Patrick, 1908] In 1422,
Portugal
Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of ...
became the last Western European country to
switch to the system begun by Dionysius.
[
] Eastern Orthodox
Eastern Orthodoxy, also known as Eastern Orthodox Christianity, is one of the three main branches of Chalcedonian Christianity, alongside Catholicism and Protestantism.
Like the Pentarchy of the first millennium, the mainstream (or "canonical") ...
countries only began to adopt AD instead of the
Byzantine calendar
The Byzantine calendar, also called the Roman calendar, the Creation Era of Constantinople or the Era of the World ( grc, Ἔτη Γενέσεως Κόσμου κατὰ Ῥωμαίους, also or , abbreviated as ε.Κ.; literal translation of ...
in 1700 when Russia did so, with others adopting it in the 19th and 20th centuries.
Although ''Anno Domini'' was in widespread use by the 9th century, the term "Before Christ" (or its equivalent) did not become common until much later. Bede used the expression ''"anno
..ante incarnationem Dominicam"'' (in the year before the incarnation of the Lord) twice. ''"Anno ante Christi nativitatem"'' (in the year before the birth of Christ) is found in 1474 in a work by a German monk. In 1627, the French
Jesuit
, image = Ihs-logo.svg
, image_size = 175px
, caption = ChristogramOfficial seal of the Jesuits
, abbreviation = SJ
, nickname = Jesuits
, formation =
, founders ...
theologian
Denis Pétau
Denis Pétau (21 August 158311 December 1652), also known as Dionysius Petavius, was a French Jesuit theologian.
Life
Pétau was born at Orléans, where he had his initial education; he then attended the University of Paris, where he successfully ...
(Dionysius Petavius in Latin), with his work ''De doctrina temporum'', popularized the usage ''ante Christum'' (Latin for "Before Christ") to mark years prior to AD.
New year
When the reckoning from Jesus' incarnation began replacing the previous dating systems in western Europe, various people chose different Christian feast days to begin the year: Christmas,
Annunciation
The Annunciation (from Latin '), also referred to as the Annunciation to the Blessed Virgin Mary, the Annunciation of Our Lady, or the Annunciation of the Lord, is the Christian celebration of the biblical tale of the announcement by the ange ...
, or Easter. Thus, depending on the time and place, the year number changed on different days in the year, which created slightly different styles in chronology:
* From 25 March 753
AUC (today in 1 BC), i.e., notionally from the incarnation of Jesus. That first "Annunciation style" appeared in
Arles
Arles (, , ; oc, label= Provençal, Arle ; Classical la, Arelate) is a coastal city and commune in the South of France, a subprefecture in the Bouches-du-Rhône department of the Provence-Alpes-Côte d'Azur region, in the former province of ...
at the end of the 9th century then spread to Burgundy and northern Italy. It was not commonly used and was called ''calculus pisanus'' since it was adopted in
Pisa
Pisa ( , or ) is a city and ''comune'' in Tuscany, central Italy, straddling the Arno just before it empties into the Ligurian Sea. It is the capital city of the Province of Pisa. Although Pisa is known worldwide for its leaning tower, the cit ...
and survived there until 1750.
* From 25 December 753 AUC (today in 1 BC), i.e., notionally from the birth of Jesus. It was called "Nativity style" and had been spread by Bede together with the ''Anno Domini'' in the early Middle Ages. That reckoning of the Year of Grace from Christmas was used in France, England and most of western Europe (except Spain) until the 12th century (when it was replaced by Annunciation style) and in Germany until the second quarter of the 13th century.
* From 25 March 754 AUC (today in AD 1). That second "Annunciation style" may have originated in
Fleury Abbey in the early 11th century, but it was spread by the Cistercians.
Florence
Florence ( ; it, Firenze ) is a city in Central Italy and the capital city of the Tuscany region. It is the most populated city in Tuscany, with 383,083 inhabitants in 2016, and over 1,520,000 in its metropolitan area.Bilancio demografico an ...
adopted that style in opposition to that of Pisa, so it got the name of ''calculus florentinus''. It soon spread in France and also in England where it became common in the late 12th century and lasted until 1752.
* From Easter, starting in 754 AUC (AD 1). That ''mos gallicanus'' (French custom) bound to a
moveable feast
A moveable feast is an observance in a Christian liturgical calendar which occurs on different dates in different years.John Ayto ''Oxford Dictionary of English Idioms'' 2010 p123 019954378X "a movable feast an event which takes place at no reg ...
was introduced in France by king
Philip Augustus (r. 1180–1223), maybe to establish a new style in the provinces reconquered from England. However, it never spread beyond the ruling élite.
With these various styles, the same day could, in some cases, be dated in 1099, 1100 or 1101.
Birth date of Jesus
The date of birth of Jesus of Nazareth is not stated in the gospels or in any secular text, but most scholars assume a date of birth between 6 BC and 4 BC.
The historical evidence is too fragmentary to allow a definitive dating, but the date is estimated through two different approaches—one by analyzing references to known historical events mentioned in the Nativity accounts in the Gospels of Luke and Matthew and the second by working backwards from the estimation of the start of the
ministry of Jesus
The ministry of Jesus, in the canonical gospels, begins with his baptism in the countryside of Roman Judea and Transjordan, near the River Jordan by John the Baptist, and ends in Jerusalem, following the Last Supper with his disciples.''Chri ...
.
Paul L. Maier
Paul L. Maier (born May 31, 1930) is a historian and novelist. He has written several works of scholarly and popular non-fiction about Christianity and novels about Christian historians. He is the former Russell H. Seibert Professor of Ancient H ...
"The Date of the Nativity and Chronology of Jesus" in ''Chronos, kairos, Christos: nativity and chronological studies'' by Jerry Vardaman, Edwin M. Yamauchi 1989 pp. 113–29[''New Testament History'' by Richard L. Niswonger 1992 pp. 121–24]
Other Christian and European eras
During the first six centuries of what would come to be known as the Christian era, European countries used various systems to count years. Systems in use included
consular dating
A consul is an official representative of the government of one state in the territory of another, normally acting to assist and protect the citizens of the consul's own country, as well as to facilitate trade and friendship between the people ...
, imperial
regnal year
A regnal year is a year of the reign of a sovereign, from the Latin ''regnum'' meaning kingdom, rule. Regnal years considered the date as an ordinal, not a cardinal number. For example, a monarch could have a first year of rule, a second year o ...
dating, and
Creation dating.
Although the last non-imperial consul,
Basilius
''Basileus'' ( el, ) is a Greek term and title that has signified various types of monarchs in history. In the English-speaking world it is perhaps most widely understood to mean "monarch", referring to either a "king" or an "emperor" and a ...
, was appointed in 541 by Emperor
Justinian I
Justinian I (; la, Iustinianus, ; grc-gre, Ἰουστινιανός ; 48214 November 565), also known as Justinian the Great, was the Byzantine emperor from 527 to 565.
His reign is marked by the ambitious but only partly realized ''renovat ...
, later emperors through to
Constans II (641–668) were appointed consuls on the first of January after their accession. All of these emperors, except Justinian, used imperial post-consular years for the years of their reign, along with their regnal years. Long unused, this practice was not formally abolished until Novell XCIV of the law code of
Leo VI Leo VI (or Leon VI, notably in Greek) may refer to :
* Leo VI the Wise, Byzantine emperor 886 to 912
* Pope Leo VI, 928 to 929
* King Leo VI of Armenia (1342 – 1393), of the House of Lusignan, last Latin king of the Armenian crusader Kingdom of C ...
did so in 888.
Another calculation had been developed by the
Alexandria
Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandria ...
n monk
Annianus around the year AD 400, placing the Annunciation on 25 March AD 9 (Julian)—eight to ten years after the date that Dionysius was to imply. Although this incarnation was popular during the early centuries of the
Byzantine Empire
The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinopl ...
, years numbered from it, an ''Era of Incarnation'', were exclusively used and are still used in
Ethiopia
Ethiopia, , om, Itiyoophiyaa, so, Itoobiya, ti, ኢትዮጵያ, Ítiyop'iya, aa, Itiyoppiya officially the Federal Democratic Republic of Ethiopia, is a landlocked country in the Horn of Africa. It shares borders with Eritrea to the ...
. This accounts for the seven- or eight-year discrepancy between the
Gregorian and
Ethiopian calendars. Byzantine chroniclers like
Maximus the Confessor
Maximus the Confessor ( el, Μάξιμος ὁ Ὁμολογητής), also spelt Maximos, otherwise known as Maximus the Theologian and Maximus of Constantinople ( – 13 August 662), was a Christian monk, theologian, and scholar.
In his ear ...
,
George Syncellus
George Syncellus ( el, Γεώργιος Σύγκελλος, ''Georgios Synkellos''; died after 810) was a Byzantine chronicler and ecclesiastic. He had lived many years in Palestine (probably in the Old Lavra of Saint Chariton or Souka, near Tekoa ...
, and
Theophanes dated their years from Annianus'
creation
Creation may refer to:
Religion
*''Creatio ex nihilo'', the concept that matter was created by God out of nothing
* Creation myth, a religious story of the origin of the world and how people first came to inhabit it
* Creationism, the belief tha ...
of the world. This era, called ''
Anno Mundi
(from Latin "in the year of the world"; he, לבריאת העולם, Livryat haOlam, lit=to the creation of the world), abbreviated as AM or A.M., or Year After Creation, is a calendar era based on the biblical accounts of the creation o ...
'', "year of the world" (abbreviated AM), by modern scholars, began its first year on 25 March 5492 BC. Later Byzantine chroniclers used ''Anno Mundi'' years from 1 September 5509 BC, the
Byzantine Era
The Byzantine calendar, also called the Roman calendar, the Creation Era of Constantinople or the Era of the World ( grc, Ἔτη Γενέσεως Κόσμου κατὰ Ῥωμαίους, also or , abbreviated as ε.Κ.; literal translation of ...
. No single ''Anno Mundi'' epoch was dominant throughout the
Christian world
Christendom historically refers to the Christian states, Christian-majority countries and the countries in which Christianity dominates, prevails,SeMerriam-Webster.com : dictionary, "Christendom"/ref> or is culturally or historically intertwin ...
.
Eusebius of Caesarea
Eusebius of Caesarea (; grc-gre, Εὐσέβιος ; 260/265 – 30 May 339), also known as Eusebius Pamphilus (from the grc-gre, Εὐσέβιος τοῦ Παμφίλου), was a Greek historian of Christianity, exegete, and Christia ...
in his ''
Chronicle'' used an era beginning with the birth of
Abraham
Abraham, ; ar, , , name=, group= (originally Abram) is the common Hebrew patriarch of the Abrahamic religions, including Judaism, Christianity, and Islam. In Judaism, he is the founding father of the special relationship between the Jew ...
, dated in 2016 BC (AD 1 = 2017 Anno Abrahami).
Spain and Portugal continued to date by the
Spanish Era
The Spanish era ( la, Æra Hispanica), sometimes called the era of Caesar, was a calendar era (year numbering system) commonly used in the states of the Iberian Peninsula from the 5th century until the 15th, when it was phased out in favour of the ...
(also called
Era of the Caesars
The Spanish era ( la, Æra Hispanica), sometimes called the era of Caesar, was a calendar era (year numbering system) commonly used in the states of the Iberian Peninsula from the 5th century until the 15th, when it was phased out in favour of the ...
), which began counting from 38 BC, well into the Middle Ages. In 1422,
Portugal
Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of ...
became the last Catholic country to adopt the ''Anno Domini'' system.
[
The ]Era of Martyrs
The Era of the Martyrs ( la, anno martyrum), also known as the ''Diocletian era'' ( la, anno Diocletiani), is a method of numbering years used by the Church of Alexandria beginning in the 4th century AD/CE and by the Coptic Orthodox Church of ...
, which numbered years from the accession of Diocletian
Diocletian (; la, Gaius Aurelius Valerius Diocletianus, grc, Διοκλητιανός, Diokletianós; c. 242/245 – 311/312), nicknamed ''Iovius'', was Roman emperor from 284 until his abdication in 305. He was born Gaius Valerius Diocles ...
in 284, who launched the most severe persecution of Christians
The persecution of Christians can be historically traced from the first century of the Christian era to the present day. Christian missionaries and converts to Christianity have both been targeted for persecution, sometimes to the point of ...
, was used by the Church of Alexandria
The Church of Alexandria in Egypt is the Christian Church headed by the Patriarch of Alexandria. It is one of the original Apostolic Sees of Christianity, alongside Rome, Antioch, Constantinople and Jerusalem.
Tradition holds that the Church of ...
and is still used, officially, by the Coptic Orthodox and Coptic Catholic
The Coptic Catholic Church ( ar, الكنيسة القبطية الكاثوليكية; la, Ecclesia Catholica Coptorum) is an Eastern Catholic particular church in full communion with the Catholic Church. Along with the Ethiopian Catholic Chu ...
churches. It was also used by the Ethiopian
Ethiopians are the native inhabitants of Ethiopia, as well as the global diaspora of Ethiopia. Ethiopians constitute several component ethnic groups, many of which are closely related to ethnic groups in neighboring Eritrea and other parts of ...
and Eritrean churches. Another system was to date from the crucifixion of Jesus
The crucifixion and death of Jesus occurred in 1st-century Judea, most likely in AD 30 or AD 33. It is described in the four canonical gospels, referred to in the New Testament epistles, attested to by other ancient sources, and consid ...
, which as early as Hippolytus and Tertullian
Tertullian (; la, Quintus Septimius Florens Tertullianus; 155 AD – 220 AD) was a prolific early Christian author from Carthage in the Roman province of Africa. He was the first Christian author to produce an extensive corpus of L ...
was believed to have occurred in the consulate of the Gemini (AD 29), which appears in some medieval
In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the Post-classical, post-classical period of World history (field), global history. It began with t ...
manuscripts.
CE and BCE
Alternative names for the ''Anno Domini'' era include ''vulgaris aerae'' (found 1615 in Latin),[
]
"Vulgar Era" (in English, as early as 1635),[
]
"Christian Era" (in English, in 1652),
"Common Era
Common Era (CE) and Before the Common Era (BCE) are year notations for the Gregorian calendar (and its predecessor, the Julian calendar), the world's most widely used calendar era. Common Era and Before the Common Era are alternatives to the or ...
" (in English, 1708),[
]
and "Current Era".[
]
Since 1856, the alternative abbreviations CE and BCE (sometimes written C.E. and B.C.E.) are sometimes used in place of AD and BC.
The "Common/Current Era" ("CE") terminology is often preferred by those who desire a term that does not explicitly make religious references but still uses the same estimated date of Christ's birth as the dividing point.
For example, Cunningham and Starr (1998) write that "B.C.E./C.E. do not presuppose faith in Christ
Jesus, likely from he, יֵשׁוּעַ, translit=Yēšūaʿ, label=Hebrew/Aramaic ( AD 30 or 33), also referred to as Jesus Christ or Jesus of Nazareth (among other Names and titles of Jesus in the New Testament, names and titles), was ...
and hence are more appropriate for interfaith dialog
Interfaith dialogue refers to cooperative, constructive, and positive interaction between people of different religious traditions (i.e. "faiths") and/or spiritual or humanistic beliefs, at both the individual and institutional levels. It is ...
than the conventional B.C./A.D." Upon its foundation, the Republic of China
Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the northeast ...
adopted the Minguo Era
The Republic of China calendar, often shortened to the ROC calendar or the ''Minguo'' calendar, is a calendar used in Taiwan, Penghu, Kinmen, and Matsu. The calendar uses 1912, the year of the establishment of the Republic of China (ROC), as ...
but used the Western calendar for international purposes. The translated term was (). Later, in 1949, the People's Republic of China adopted () for all purposes domestic and foreign.
No year zero: start and end of a century
In the AD year numbering system, whether applied to the Julian or Gregorian calendar
The Gregorian calendar is the calendar used in most parts of the world. It was introduced in October 1582 by Pope Gregory XIII as a modification of, and replacement for, the Julian calendar. The principal change was to space leap years dif ...
s, AD 1 is immediately preceded by 1 BC, with nothing in between them (there was no year zero
A year zero does not exist in the Anno Domini (AD) calendar year system commonly used to number years in the Gregorian calendar (nor in its predecessor, the Julian calendar); in this system, the year is followed directly by year . However, the ...
). There are debates as to whether a new decade, century, or millennium begins on a year ending in zero or one.
For computational reasons, astronomical year numbering
Astronomical year numbering is based on AD/ CE year numbering, but follows normal decimal integer numbering more strictly. Thus, it has a year 0; the years before that are designated with negative numbers and the years after that are designated ...
and the ISO 8601
ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data. It is maintained by the Geneva-based International Organization for Standardization (ISO) and was first published in 1988, w ...
standard designate years so that AD 1 = year 1, 1 BC = year 0, 2 BC = year −1, etc. In common usage, ancient dates are expressed in the Julian calendar, but ISO 8601 uses the Gregorian calendar and astronomers may use a variety of time scales depending on the application. Thus dates using the year 0 or negative years may require further investigation before being converted to BC or AD.
See also
* Before Present
Before Present (BP) years, or "years before present", is a time scale used mainly in archaeology, geology and other scientific disciplines to specify when events occurred relative to the origin of practical radiocarbon dating in the 1950s. Becaus ...
* Holocene calendar
The Holocene calendar, also known as the Holocene Era or Human Era (HE), is a year numbering system that adds exactly 10,000 years to the currently dominant ( AD/ BC or CE/BCE) numbering scheme, placing its first year near the beginning of the ...
Notes
References
Citations
Sources
*
*
* Bede. (731)
''Historiam ecclesiasticam gentis Anglorum''
. Retrieved 2007-12-07.
*
*
* Corrected reprinting of original 1999 edition.
*
* (despite beginning with 2, it is English)
* Declercq, G. "Dionysius Exiguus and the Introduction of the Christian Era". ''Sacris Erudiri'' 41 (2002): 165–246. An annotated version of part of ''Anno Domini''.
* Doggett. (1992)
(Ch. 12), in P. Kenneth Seidelmann (Ed.) ''Explanatory supplement to the astronomical almanac.'' Sausalito, CA: University Science Books. .
* Patrick, J. (1908)
. In ''The Catholic Encyclopedia''. New York: Robert Appleton Company. Retrieved 2008-07-16 from New Advent
*
*
*
External links
Calendar Converter
{{Interwiki conflict
6th-century Christianity
Calendar eras
Christian terminology
Chronology
Latin religious words and phrases
Timelines of Christianity