Christian and jewish dating
The first five days of Jewish Creation week occupy the last five days of AM 1, Elul 25–29.
The sixth day of Creation, when Adam and Eve were created, is the first day of AM 2, Rosh Hashanah (1 Tishrei).
Ben Zion Wacholder points out that the writings of the Church Fathers on this subject are of vital significance (even though he disagrees with their chronological system based on the authenticity of the Septuagint, as compared to that of the Hebrew text), in that through the Christian chronographers a window to the earlier Hellenistic biblical chronographers An immense intellectual effort was expended during the Hellenistic period by both Jews and pagans to date creation, the flood, exodus, building of the Temple...
In the course of their studies, men such as Tatian of Antioch (flourished in 180), Clement of Alexandria (died before 215), Hippolytus of Rome (died in 235), Sextus Julius Africanus of Jerusalem (died after 240), Eusebius of Caesarea in Palestine (260-340), and Pseudo-Justin frequently quoted their predecessors, the Graeco-Jewish biblical chronographers of the Hellenistic period, thereby allowing discernment of more distant scholarship.
The later Latin translation called the Vulgate, an interpretative translation from the later Masoretic Text (a Jewish revision and consolidation of earlier Hebrew texts), replaced it in the west after its completion by St. 405, Latin being the most common vernacular language in those regions.
The earliest extant Christian writings on the age of the world according to the biblical chronology were therefore based on the Septuagint, due to its early availability.
(See Dating creation.) During the Talmudic era, from the 1st to the 10th centuries AD, the center of the Jewish world was in the Middle East, primarily in the Talmudic Academies of Babylonia and Israel.It was the first day of the year in the medieval Julian calendar and the nominal vernal equinox (it had been the actual equinox at the time when the Julian calendar was originally designed).Considering that Christ was conceived at that date turned March 25 into the Feast of the Annunciation which had to be followed, nine months later, by the celebration of the birth of Christ, Christmas, on December 25.The Septuagint was the most scholarly non-Hebrew version of the Old Testament available to early Christians.Many converts already spoke Greek, and it was readily adopted as the preferred vernacular-language rendering for the eastern Roman Empire.