Era beginning/end
None know exactly when the creator AO spun the world into existence, only when he handed it off to lesser gods to control. It is commonly accepted that before he handed it off, the world was empty of life as AO was too busy making things to populate it.
Another world spun into existence by the creator god AO. After some time he pulled great beings from other places and allowed them to take over rule of the world as gods. 1610 BDW (Before Demon Wars) marks when he moved on, as is his way, though he never forgets his creations and visits them from time to time to see how those he placed in charge have kept his creation going. The gods AO placed to rule began creating creatures and beings they each felt should populate the world.