For the next nine days, we should prepare for the feast of Pentecost by praying this novena:
Novena to the Holy Ghost
Pray especially starting on the day after Ascension Thursday, ending on the Feast of Pentecost
Almighty and eternal God, Who hast vouchsafed to regenerate us by water and the Holy Ghost, and hast given us forgiveness of all our sins, vouchsafe to send forth from heaven upon us Thy sevenfold Spirit, the Spirit of Wisdom and Understanding, the Spirit of Counsel and Fortitude, the Spirit of Knowledge and Piety, and fill us with the Spirit of Holy Fear. Amen.
Recite one Our Father, one Hail Mary, and seven times Glory Be.