Time dating history of bc ad
); the latter means “in the year of the lord,” often translated as “in the year of our lord.” (It was thought when the AD dating system was created that its year 1 was the year Jesus of Nazareth was born.) was the first of these to appear.Prior to the 6th century AD, many Christians who didn’t use an Anno Mundi (in the year of the world) type system relied on Roman dating, either marking dates from the year legend had it that Romulus and Remus founded Rome (753 BC) or by relying on the date system established under the Roman emperor Diocletian (244-311), based on the accession of Diocletian.
When this sort of thing was ineffective, they progressed to arresting and torturing Christians, starting with the leaders.
The Anno Domini system, sometimes called the Dionysian Era or Christian Era, began to catch on among the clergy in Italy relatively soon after and, though not terribly popular, did spread somewhat among the clergy in other parts of Europe.
Most notably, in the 8th century, the English monk Bede (now known as the Venerable Bede) used the dating system in his wildly popular (AD 731).
In AD 525, the monk Dionysius Exiguus of Scythia Minor was working on his table to determine when Easter fell when he decided to eliminate reference to Diocletian by listing his table’s first year as Anno Domini 532, explicitly stating this was referring to the year directly following the last year of the old Diocletian-based table, Anno Diocletiani 247.
How Dionysius came up with 525 years since Jesus was born at the time he was calculating his table (532 years from when the table’s dates began) isn’t clear, but he wasn’t far off the range most biblical scholars today think, with the more modern estimates tending to ring in somewhere between 6 to 4 BC for the actual birth of Christ.
This is often credited with not only popularizing the calendar reference, but also introducing the concept of BC, notably setting 1 BC to be the year prior to AD 1, ignoring any potential zero year.