The Oeridian Record (abbreviated OR, and called Oerid Reckoning in Doc's Island) is a method of counting the years among the Oeridian people. It is commonly used for dates prior to Year 1 in the Common Year calendar, and by many Oeridian-settled nations that were never part of the Great Kingdom.
Year 1 in the Common Year (CY) calendar is equivalent to 645 in the Oeridian Record. -1 CY is equivalent to 644 OR.
In ancient times the Oeridians were nomads who wandered the central plains of Oerik west of the Tyurzi Mountains. In the year 1 of the Oeridian Record, while the Baklunish-Suloise Wars were threatening to overwhelm the Oeridian homelands, these nomads united their tribes in a single confederation to resist imperial Baklunish incursions from the Ulsprue Mountains and by Baklunish nomads to the north.
- Gygax, Gary. The World of Greyhawk. Lake Geneva, WI: TSR, 1980.
- -----. World of Greyhawk Fantasy Game Setting. Lake Geneva, WI: TSR, 1983.