Sunday, October 26, 2011 is the feast of the Kingship of Our Lord Jesus Christ. One may gain a plenary indulgence by the public recitation of the Act of Consecration of the Human Race to the Sacred Heart of Jesus.
The kingship and empire of Christ have been recognized in the pious custom, practiced by many families, of dedicating themselves to the Sacred Heart of Jesus; not only families have performed this act of dedication, but nations, too, and kingdoms. In fact, the whole of the human race was at the instance of Pope Leo XIII, in the Holy Year 1900, consecrated to the Divine Heart.
We institute the Feast of the Kingship of Our Lord Jesus Christ to be observed yearly throughout the whole world on the last Sunday of the month of October - the Sunday, that is, which immediately precedes the Feast of All Saints. We further ordain that the dedication of mankind to the Sacred Heart of Jesus, which Our predecessor of saintly memory, Pope Pius X, commanded to be renewed yearly, be made annually on that day.
Act of Consecration of the Human Race to the Sacred Heart of Jesus
Most sweet Jesus, Redeemer of the human race, look down upon us humbly prostrate before Thy altar. We are Thine, and Thine we wish to be; but to be more surely united with Thee, behold each one of us freely consecrates himself today to Thy most Sacred Heart.
Many indeed have never known Thee; many too, despising Thy precepts, have rejected Thee. Have mercy on them all, most merciful Jesus, and draw them to Thy Sacred Heart. Be Thou King, O Lord, not only of the faithful who have never forsaken Thee, but also of the prodigal children who have abandoned Thee; grant that they may quickly return to their Father's house lest they die of wretchedness and hunger.
Be Thou King of those who are deceived by erroneous opinions, or whom discord keeps aloof, and call them back to the harbor of truth and unity of faith, so that soon there may be but one flock and one Shepherd.
Grant, O Lord, to Thy Church assurance of freedom and immunity from harm; give peace and order to all nations, and make the earth resound from pole to pole with one cry: "Praise be to the Divine Heart that wrought our salvation; to It be glory and honor for ever." Amen.
Additional info and resources can be found here, my post from 2010.