Normally the last Sunday of Ordinary Time, just before Ash Wednesday, is traditionally set aside for the observance of the transfiguration of Christ. The great glory of God came upon Christ, in full view of the three disciples. We see his identity and work more clearly and we catch a glimpse of the full glory he will receive when his redemptive work is completed. This event prepares him for his journey to the cross, and prepares us to journey with him.
Some possible Psalms to use: