312 BC
The Seleucid era begins
Seleucus's recovery of Babylon becomes the starting point of a calendar era.
- Time period
- 312 BC
- Region
- Middle East
- Theme
- Politics
The Seleucid era counted years from Seleucus I's recovery of Babylon in 312 or 311 BCE. This dating system remained in use long after the dynasty's fall.