The Great Disappointment in the Millerite movement was the reaction that followed Baptist preacher William Miller's proclamations that Jesus Christ would return to the Earth by 1844, which he called the Second Advent. His study of the Daniel 8 prophecy during the Second Great Awakening led him to conclude that Daniel's "cleansing of the sanctuary" was cleansing the world from sin when Christ would come, and he and many others prepared. When Jesus did not appear by October 22, 1844, Miller and his followers were disappointed.