Original sentence: Both the Anno Domini system and the derived Common Era system of reckoning years have their origins in a faulty 6th Century attempt to establish his birth date.The gospels mostly portray his last one to three years, particularly the last week before a death by crucifixion, which, based on some historical data mentioned, would have been anywhere from the years 29 to 33.There are many similarities between stories about Jesus and myths of Pagan Godmen such as Mithras, Apollo, Attis, and Osiris Dionysus, leading to conjectures that the pagan myths were adopted by early accounts of Jesus.Those gospels depict little of his early life, apart from stories surrounding his birth, which according to best estimates would have been about 6 – 4 BC (or 6 - 4 BCE in the Common Era system of reckoning years)
Edited sentence: The gospels mostly portray his last one to three years, particularly the last week before a death by crucifixion, which, based on some historical data mentioned, would have been anywhere from the years AD 29 to 33.There are many similarities between stories about Jesus and myths of Pagan Godmen such as Mithras, Apollo, Attis and Osiris Dionysus, leading to conjectures that the pagan myths were adopted by early accounts of Jesus.Those gospels depict little of his early life, apart from stories surrounding his birth, which according to best estimates would have been about 6 – 4 BC