Dating an older gy
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).
The Byzantine era was used as the civil calendar by the Byzantine Empire from AD 988 to 1453, and by Russia from c. The computation was derived from the Septuagint version of the Bible, and placed the date of creation at 5509 years before the Incarnation, which was later taken to mean 5509 BC when conversions to the Christian era were desired.The Alexandrian era, arising in AD 412, was the precursor to the Byzantine era.After the initial attempts by Hippolytus, Clement of Alexandria and others, the Alexandrian computation of the date of creation was worked out to be 25 March 5493 BC.Most of the 1,732-year difference resides in numerical discrepancies in the genealogies of the two versions of the Book of Genesis.Patriarchs from Adam to Terah, the father of Abraham, are said to be older by as much as 100 years or more when they begat their named son in the Greek Septuagint than they were in the Latin Vulgate (Genesis 5; Genesis 11) or the Hebrew Tanakh (Gen 5; Gen 11).
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).