The Day of Reckoning was a prophesied day when all who have renounced the Ori would feel their wrath.
History[]
As the Priors moved throughout the Milky Way galaxy, they spread word of this event to their follows who in turn used it to sway non-believers to believe in the Ori. The Day finally came to pass in the Milky Way with the Battle of P3Y-229, where the Ori's first four ships entered the Milky Way, destroying most of those who banded together to try and stop them at the Supergate. (SG1: "The Powers That Be", "The Scourge", "Arthur's Mantle", "Crusade", "Camelot")