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.However, based on a lunar eclipse that Josephus reports shortly before the death of Herod the Great, the birth of Christ would have been some time before the year 4 BC/BCE, probably 5 or 6 BC/BCE.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: However, based on a lunar eclipse that Josephus reports shortly before the death of Herod the Great, the birth of Christ would have been some time before the year 4 BC, probably 5 or 6 BC.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