Anno Mundi

Anno Mundi (years since the creation of the world) is used in the Byzantine calendar (5509 BC).

The Mishneh Torah was compiled between 1170 and 1180 CE (4930 and 4940 AM), while Maimonides was living in Egypt, and is regarded as Maimonides' magnum opus.

Abraham Zacuto, Sefer Yuchasin, Cracow 1580 (Hebrew), p. 261 in PDF, which reads: "… I saw in a booklet that the Ark of God, even Rabbi Moses b. Maimon, of blessed memory, had been taken up (i.e. euphemism for "had died"), in the year [4],965 anno mundi (= 1204/5 CE) in Egypt, and the Jews wept for him – as did [all] the Egyptians – three days, and they coined a name for that time of year, [saying], 'there was wailing,' and on the seventh day [of his passing], the news reached Alexandria, and on the eighth day, [the news reached] Jerusalem, and in Jerusalem they made a great public mourning [on his behalf] and called for a fast and public gathering, where it was that the prayer precentor read out the admonitions, 'If you shall walk in my statutes [etc.]' (Leviticus 26:3-ff.), as well as read the concluding verse [from the Prophets], 'And it came to pass that Samuel spoke to all of Israel [etc.],' and he then concluded by saying that the Ark of God had been taken away.

The entries span from the Deluge, dated as 2,242 years after creation to AD 1616.

The calendar was based on the Julian calendar, except that the year started on 1 September and the year number used an Anno Mundi epoch derived from the Septuagint version of the Bible.

The Talmudic academies in Babylonia, also known as the Geonic academies, were the center for Jewish scholarship and the development of Halakha from roughly 589 to 1038 CE (Hebrew dates: 4349 AM to 4798 AM) in what is called "Babylonia" in Jewish sources, at the time otherwise known as Asōristān (under the Sasanian Empire) or Iraq (under the Muslim caliphate until the 11th century).

Al-Khwarizmi's study of the Jewish calendar describes the 19-year intercalation cycle, the rules for determining on what day of the week the first day of the month Tishrī shall fall, the interval between the Jewish era (creation of Adam) and the Seleucid era, and the rules for determining the mean longitude of the sun and the moon using the Jewish calendar.

Rabbinic sources state that the First Temple stood for 410 years and, based on the 2nd-century work Seder Olam Rabbah, place construction in 832 BCE and destruction in 422 BCE (3338 AM), 165 years later than secular estimates.

"However, nowhere in his exposition of his table does Dionysius relate his epoch to any other dating system, whether consulate, Olympiad, year of the world, or regnal year of Augustus; much less does he explain or justify the underlying date."

A.M. (or AM) – for the Latin Anno Mundi, meaning "in the year of the world", has its epoch in the year 3761 BC. This was first used to number the years of the modern Hebrew calendar in 1178 by Maimonides. Precursors with epochs one or two years later were used since the 3rd century, all based on the Seder Olam Rabba of the 2nd century. The year beginning in the northern autumn of 2000 was 5761 AM.