“And Thus Commenced the Reign of the Judges”

Church Educational System

The change in the government instituted through King Mosiah was so significant that from then until the birth of Christ (see 3 Nephi 2:8) the Nephites recorded their time in relation to the beginning of the reign of the judges. Previously the Nephites kept track of time from the year Lehi left Jerusalem.

Book of Mormon Student Manual (2009 Edition)