The Anno Domini year numbering was developed by a monk named Dionysius Exiguus in Rome during 525, as a result of his work on calculating the date of Easter.

The table counted the years starting from the presumed birth of Christ, rather than the accession of the emperor Diocletian on 20 November 284, or as stated by Dionysius: " sed magis elegimus ab incarnatione Domini nostri Jesu Christi annorum tempora praenotare ..." It is assumed Dionysius Exiguus intended either 1 AD or 1 BC to be the year of Christ's birth ( a " year zero " does not exist in this calendar ).

However, it is clear he was familiar with the works of Virgil and with Pliny the Elder's Natural History, and his monastery also owned copies of the works of Dionysius Exiguus.

Bede used both these approaches on occasion, but adopted a third method as his main approach to dating: the anno domini method invented by Dionysius Exiguus.

The CE / BCE designation uses the year-numbering system introduced by the 6th-century Christian monk Dionysius Exiguus, who started the Anno Domini designation, intending the beginning of the life of Jesus to be the reference date.

The most widely used epoch is a conventional birthdate of Jesus ( which was established by Dionysius Exiguus in the sixth century ).

* 525: Having settled in Rome c. 500, Scythian monk Dionysius Exiguus invents the Anno Domini era calendar based on the estimated birth year of Jesus Christ.

* Dionysius Exiguus creates the Anno Domini system, inspired by the birth of Jesus, in 525.

* Birth of Jesus, as assigned by Dionysius Exiguus in his anno Domini era according to at least one scholar.

In 525 ( the consulship of Probus Junior Flavius Probus ), a Christian monk named Dionysius Exiguus stated that the incarnation of Jesus occurred 525 years earlier.

In this year, the monk Dionysius Exiguus proposed a calendar starting with the birth of Jesus ( the AD system ), so this was the first time the year was designated AD.

* Dionysius Exiguus, Scythian theologian-mathematician, inaugurates at Rome the practice of using A. D. ( Anno Domini ) for calender dates after the birth of Jesus Christ ( who is actually born in 7 B. C.

* Dionysius Exiguus ( approximate date )

* Dionysius Exiguus, inventor of the Anno Domini era ( approximate date )

* Dionysius Exiguus, creator of the Anno Domini system of date measurement

* Incarnation of Jesus ( conception on 25 March and birth on 25 December ), as assigned by Dionysius Exiguus in his anno Domini era according to most scholars ( Dionysius used the word " incarnation ", but it is not known whether he meant conception or birth ).

Dionysius Exiguus ( about the year 500 ) was the founder of that era, which is nowadays the most widespread dating system on earth.

Dionysius Exiguus ’ Anno Domini era ( which contains only calendar years AD ) was extended by Bede to the complete Christian era ( which contains, in addition all calendar years BC, but no year zero ).

* Dionysius Exiguus ' Easter table

However, by the sixth and seventh centuries it had become obsolete and had been replaced by those of Victorius of Aquitaine and, more accurately, those of Dionysius Exiguus.

By the 660s, Ionan adherents were still using calculation tables that had been regarded as in error by Rome ( ultimately in favor of the tables of Dionysius Exiguus ).

Both " zeros " continued to be used by ( among others ) Bede, by whose extension of Dionysius Exiguus ’ Easter table to a great Easter cycle all future Julian calendar dates of Easter Sunday were fixed unambiguously at last.

Gould also included comments on adjustments to the calendar, such as those by Dionysius Exiguus ( the eponymous " Diminutive Dennis "), the timing of celebrations over different transitional periods, and the " high " versus " pop " culture interpretation of the transition.

Saint Denis ( also called Dionysius, Dennis, or Denys ) is a Christian martyr and saint.

* Monk Dionysius Exiguus ( Dennis the Little or Dennis the Short ) ( 67 )

* Dennis, in Latin Dionysius, and its relatives mean " of Dionysus.

Consequently one year since the Incarnation would have meant 25 March 1, meaning that Dionysius placed the Incarnation on 25 March 1 BC.

Dionysius Thrax () ( 170 BC – 90 BC ) was a Hellenistic grammarian and a pupil of Aristarchus of Samothrace.

* The Tekhne Grammatike of Dionysius Thrax Translated into English by J. Alan Kemp ( Historiographia Linguistica 13: 2 / 3, 1986, pp. 343 – 363 ).

The main literary sources for Servius ' life and achievements are the Roman historian Livy ( 59 BC – AD 17 ), his near contemporary Dionysius of Halicarnassus, and Plutarch ( c. 46 – 120 AD ); their own sources included works by Quintus Fabius Pictor, Diocles of Peparethus and Quintus Ennius.

* Dionysius, tyrant of Syracuse ( c. 432 BC – 367 BC ).

date unknown – Dionysius Andreas Freher, German mystic ( d. 1728 )

Dionysius of Halicarnassus ' imaginative account of Romulus ' triumph ( almost certainly informed by equally nostalgic Roman sources ) led him to reflect that the triumphs of his own day ( Ca 60 BCE – after 7 BCE ) " departed in every respect from the ancient tradition of frugality ".

* October 15 – Dionysius I, Metropolitan of Moscow

* December 26 – Pope Dionysius dies at Rome after a 9-year reign and is succeeded by Pope Felix I.

* December 26 – Pope Dionysius

* January 5 – Pope Felix I succeeds Pope Dionysius as the 26th pope.

* 432 BC – Dionysius, tyrant of Syracuse ( approximate date ) ( d. 367 BC )

* Dionysius of Halicarnassus – frag.

Dionysius of Halicarnassus ( 1. 61 – 62 ) states that Dardanus ' original home was in Arcadia where Dardanus and his elder brother Iasus ( elsewhere more commonly called Iasion ) reigned as kings following Atlas.

* Dionysius of Halicarnassus, Roman Antiquities, V: 1 – 39

He was replaced by French Calvinist Dionysius Beurreus ( 1500 – 67 ).

* Mar Thoma VI ( 1765 – 1808 ) – ( 1765 – 1808 ) Consecrated by Marthoma V. On June 1770, to avoid a split in the church, he accepted re-consecration and the title Dionysius from Antiochan bishops.

* Mar Thoma X ( Malankara Metropolitan ) ( 1816 – 1816 ) – Also known as Pulikottil, Joseph Mar Dionysius was consecrated by Mar Philoxenos II of the Malabar Independent Syrian Church ( Thozhiyoor Sabha ).

Dionysius of Halicarnassus (, Dionysios son of Aléxandros, of Halikarnassós, c. 60 BC – after 7 BC ) was a Greek historian and teacher of rhetoric, who flourished during the reign of Caesar Augustus.

Dionysius I or Dionysius the Elder ( c. 432 – 367 BC ) was a Greek tyrant of Syracuse, in what is now Sicily, southern Italy.