Further discussion and study resulted in the brief adoption of a new date—April 18, 1844, one based on the Karaite Jewish calendar (as opposed to the Rabbinic calendar). Like the previous date, April 18 passed without Christ's return. More study led the Millerites to believe that they had entered the "tarrying time"—a time of waiting after which Christ would finally return. This belief sustained the Millerites through the months of May to July 1844. As Knight notes however, this period represented a "flatness in Millerite evangelism," when even the Millerite preachers must have experienced diminished certainty.