The history of Krynn is divided into five ages: the Age of Starbirth, the Age of Dreams, the Age of Might, the Age of Despair, and the Age of Mortals. Astinus of Palanthas, in his work Iconochronos, divides the years of Krynn into PC (Prae Cataclius or “before the Cataclysm”) and AC (Alt Cataclius or “after the Cataclysm). After the Chaos War, the chronicler Nathal introduced an alternative reckoning, starting with the year 384 AC which he renames 1 SC (Secundus Cataclius or “Second Cataclysm”). This system is now used concurrently with the AC reckoning.