Seleucid era
Calendar era used during Hellenistic period
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Versions
Two different variations of the Seleucid years existed, one where the year started in spring and another where it starts in autumn:
- The natives of the empire used the Babylonian calendar, in which the new year falls on 1 Nisanu (3 April in 311 BC), so in this system year 1 of the Seleucid era corresponds roughly to April 311 BC to March 310 BC. This included the inhabitants of Coele-Syria, notably the Jews who call it the Era of Contracts (Hebrew: מניין שטרות, romanized: minyān shəṭarōṯ).
- The Macedonian court adopted the Babylonian calendar (substituting the Macedonian month names) but reckoned the new year to be in the autumn (the exact date is unknown). In this system year 1 of the Seleucid era corresponds to the period from autumn 312 BC to summer 311 BC. By the 7th century AD / 10th AG, the west Syrian Christians settled on 1 October-to-30 September. Jews, however, reckon the start of each new Seleucid year with the lunar month Tishri.
These differences in the beginning of the year mean that dates differ by one if they fall between spring and autumn. Notably, the Jewish historical book 1 Maccabees generally uses the Babylonian and Judean year count (1 Maccabees 6:20, 1 Maccabees 7:1, 9:3, 10:1, etc.). However, the book 2 Maccabees exclusively uses the Macedonian version of the calendar, likely because it was written in either Cyprus or Egypt. Elias Bickerman gives this example:
- For instance, the restoration of the temple of Jerusalem by Judas Maccabaeus, approximately 15 December 164 BC, fell in the year 148 of the Seleucid Era according to Jewish (and Babylonian) calculation, but in the year 149 for the court.
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Later usage
The Seleucid era was used as late as the sixth century CE, for instance in the Zabad inscription in Syria, dated the 24th of Gorpiaios, 823 (24 September, 512 AD), and in the writings of John of Ephesus. Syriac chroniclers continued to use it up to Michael the Syrian in the 12th century AD / 15th century AG. It has been found on Central Asian tombstones of Christians belonging to the Church of the East well into the 14th century AD.
The Seleucid era counting, or "era of contracts" (minyān shəṭarōṯ), was used by Yemenite Jews in their legal deeds and contracts until modern times, a practice derived from an ancient Jewish teaching in the Talmud, requiring all Diaspora Jews to uphold its practice. The Seleucid era counting is mentioned in the Book of Maccabees (I Macc. i. 11) and in the writings of the historian Josephus. The Seleucid era counting fell into disuse among most Jewish communities, following Rabbi David ben Zimra's cancellation of the practice when he served as Chief Rabbi of Egypt.