|Year of the Cruel Storms||Dale Reckoning||Cormyr Reckoning||Northreckoning||Netheril Year||Mulhorand Calendar||Present Reckoning||Shou Year|
|268 DR||243 CR||-764 NR||4127 NY||2402 MC||-1090 PR||1518 NY|
- The mithral supply beneath Undermountain is depleted. First discovered in −1288 DR by King Melair I of Clan Melairkyn, the end of the mithral will give the duergar cause to abandon Undermountain in 284 DR.
- The continuing advance of the Anauroch desert causes the realm of Hlundadim to collapse. The Great Hlundadim, its ruler, disappears, and the goblinkin subjects divide into feuding, wandering bands.