Eponym dating system
The eponym dating system was how ancient Assyria tracked years. Each year was named after the Limmu, the official who led that year’s New Year festival. The system began in Assur and lasted for more than a thousand years, ending with the fall of the Assyrian Empire in the 7th century BCE. At first, eponyms were chosen by lot, but later a fixed rotation led by the king was used.
The earliest records come from Karum-Kanesh, and the practice spread after Shamshi-Adad I united northern Mesopotamia. Several Old Assyrian limmu lists were later gathered into the Revised Eponym List (REL), covering about 255 years in the early second millennium BCE. Shamshi-Adad I is a central figure of this period; he conquered Assur and reigned for many years. The exact dating of his reign is debated, but evidence from tree rings and radiocarbon supports the middle chronology, placing his death around 1776–1768 BCE. There is also a link between a year after his birth and a solar eclipse known from other records, which helps anchor dates.
Eponym lists also include brief notes about important events. The best-known lists cover roughly 911–631 BCE and align with the Canon of Kings, giving dates such as a famous solar eclipse in 763 BCE during the tenth year of Aššur-dan II (now dated to June 15, 763 BCE). Other dated events include the Assyrian capture of Thebes in 664 BCE and the dating of coin minting.
Today, 19 surviving clay tablets with limmu records exist; ten of them contain year-by-year notes, mostly about military campaigns. These lists help historians date Neo-Assyrian history and understand which campaigns were most important. A modern translation with BC dates is available.
This page was last edited on 2 February 2026, at 10:07 (CET).