Nalduqqiatus

Before the events of the The Mage War, the island currently called Nalduqqia was connected to the larger continent by an isthmus that was, in places, only a mile across. At that time, the area was occupied largely by elves and a roving sept of halflings who traveled from clan-land to clan-land.
The wide coastline led to the elves developing a powerful naval trade empire, with High Elven sailors establishing routes that reached all the way across the world to Alkhade and Ghicachio. Sometime after the destruction of the previous calendar, an elven king named Nalduqqiat used careful marital alliances over the course of nearly a century to unite the clans together, renaming the island Nalduqqiatus and establishing a calendar devoted to the six gods worshipped by the clans. The king dated years starting with the year of unification, and imposed this dating system on his trading partners for the duration of his two hundred year reign. Over time, this system snowballed in popularity and convenience. It is the division of months and weeks used to this day.
Over time humans (particularly those from Reach) began settling in the kingdom, and the during the Mage War many of the native elves became part of the planar migration. As the area became separated by seawater with the destruction of the isthums, and suddenly lacking in central leadership with the disappearance of the rulling elf class, the kingdom dissolved to infighting as various factions from within and without fought to claim control of the ports around the island's coast. Eventually, the name of the island evolved in the lexicon to Nalduqqia. Old elven ruins litter the land, with a decent percentage of them still mostly untouched by treasure hunters and arcanologists for fear of ancient spells or cursed monsters lurking within. Architects' artistic reconstructions of some of these Nalduqqiatus-era buildings estimate that the tallest buildings were made of glass or crystal and reached as high as eighty feet into the air.