The origin of the novena is the nine days from the day after the Ascension until Pentecost Eve. But now with six days, do we say sexinas?

ACT OF CONSECRATION
TO THE HOLY GHOST
On my knees / before the great multitude of heavenly witnesses / I offer myself, soul and body / to Thee O Eternal Spirit of God. / I adore the brightness of Thy purity / the unerring keeness of Thy justice / and the might of Thy love. Thou art the Strength / and Light of my soul. / In Thee I live and move and am. / I desire never to grieve Thee / Mercifully guard my every thought / and grant that I may always watch for Thy light / and listen to Thy voice / and follow Thy graciuos inspirations. / I cling to Thee / and give myself to Thee / and ask Thee / by Thy compassion / to watch over me in my weakness. / Holding the pierced feet of Jesus / and looking at His five Wounds / and trusting in His Precious Blood / and adoring His opened side and stricken Heart / I implore Thee / Adorable Spirit / Helper of my imfirmity, / so to keep me in Thy grace / that I may never sin against Thee. / Give me grace / O Holy Ghost, / Spirit of the Father and of the Son / to say to Thee always and everywhere / "Speak, Lord / for Thy servant heareth."
PRAYER FOR THE SEVEN GIFTS
OF THE HOLY GHOST
O Lord Jesus Christ / Who, before ascending into heaven / did promise to send the Holy Ghost / to finish Thy work / in the souls of Thine Apostles and Disciples / deign to grant the same Holy Spirit to me / that He may perfect in my soul / the work of Thy grace and Thy love. / Grant me the Spirit of Wisdom / that I may despise the perishable things of this world / and aspire only after the things / that are eternal, / the Spirit of Understanding / to enlighten my mind / with the light of Thy divine truth, / the Spirit of Counsel / that I may ever choose / the surest way of pleasing God / and gaining heaven, / the Spirit of Fortitude / that I may bear my cross with Thee / and that I may overcome with courage all the obstacles that oppose my salvation, / the Spirit of Knowledge that I may know God and know myself / and grow perfect in the science of the Saints, / the Spirit of Piety / that I may find the service of God sweet and amiable, / the Spirit of Fear of the Lord / that I may be filled with a loving reverence towards God, and may dread in any way to displease Him. / Mark me, dear Lord, / with the sign of Thy true disciples / and animate me in all things with Thy Spirit. / Amen.