The Ascension of Our Lord, which occurred 40 days after Jesus Christ rose from the dead on Easter, is the final act of our redemption that Christ began on Good Friday. On this day, the risen Christ, in the sight of His apostles, ascended bodily into Heaven.
Christ's bodily Ascension foreshadows our own entrance into Heaven not simply as souls, after our death, but as glorified bodies, after the resurrection of the dead at the Final Judgment. In redeeming mankind, Christ not only offered salvation to our souls but began the restoration of the material world itself to the glory that God intended before Adam's fall.
In 2015, Ascension of Our Lord is Thursday, May 14, and is a Holy Day of Obligation.