September 26, 1460: Pope Pius II assembles European leaders, then delivers a three-hour sermon to inspire them to launch a new crusade against the Turks. The speech works, but then another speaker, Cardinal Bessarion, adds a three-hour sermon of his own. After six hours of preaching, the European princes lose all interest in the cause; they never mount the called-for crusade.

September 26, 1897: Charles C. Overton, a Sunday school superintendent at Brighton Chapel, Staten Island, spontaneously promotes ...