The world of Faerun underwent four main ages, as recounted in Old Tradition tomes and historical annals.
The Antedawn
The first writings about the Truths mention this unknown, unknowable age. Eons in which the world did not yet exist and prior to the creation of all forms of life and death. The counting of years started after the end of this age, when the peoples of Faerun began to civilize and keep track of their history.
First Age – A Time Before Ezreal El’s Death (B.E.)
The most lasting amongst the ages known to sentient beings. An age of conquest, expansion, discovery, and cultural and political ramification. This age ended with the passing of Ezreal El, he who most of all is, was, and always will be remembered in the fabric of life in Faerun.
The First Age lasted several millennia and included events such as: the rise of the First Men and the inner schism that gave birth to humans; Erven’s conquering of The Mark; the war between the First Men and the ancient people of Ishdrim; the birth and seating of Mirithlen, and in the end, Ezreal El’s Enunciation of Truths.
Second Age – A Time After Ezreal El’s Death (A.E.)
An important age for all subsequent era: The Old Tradition began to take hold and the knowledge of worlds was established as a foundation for arcane studies.
The empire of the First Men reached its peak before being decimated by an earthquake in 275 A.E., thus marking the decline of the race. Daggerford’s fall was the beginning, and the fall of Haven, was the end.
It began with the death of Ezreal El and its preeminent event was the alleged rise of Mirithlen, daughter of Ezreal El, to Lunar Godhood.
Other parts of the world saw the curse bestowed upon the whole race of the Alperns, and witnessed the foundation of the Ejre people at the hand of Rahidra, at the beginning of the second age.
This age was relatively brief, ended abruptly by the cataclysm that shoot the world. In the year 582 A.E., The Second Age ended, and the Lunar Age began.
Lunar Age
In the day that went down in history as “The Last Sun”, apocalypse cast Faerun in its Night Eternal. Amaunator, the Prime of the Sun, faced its own death, and the Dark Mirror aligned with the Material Plane.
The descent of the Known Lands lasted over a century: entire species were extinct, while the survivors underwent physical and spiritual warping. The First Men paid the ultimate price for the horror they unleashed on the world and were irredeemably branded by evil.
The cult of the Unholy Sacrament rose alongside Ezreal El’s rebirth, and the world turned into a desolate, forlorn wasteland whose only light shone as the dawning Lunar Cult.
Ultimately, the people of the World Below came to the World Above, driven out of their homes by an unknown evil.
Faerun is currently in the year 697 A.E., and few remain to remember what sunlight was.