Mass of the Feast, Gloria, Credo, proper Communicantes, preface of Ascension. After the Gospel at the main Mass, the Paschal Candle is extinguished
After Mass, the Paschal Candle is stored away, as it has no further role until the Paschal Vigil of next year and is hereafter not displayed anywhere in the church
Matins: All is proper to the feast, Te Deum
Lauds: Proper antiphons, with psalms of Sunday (first schema); remainder proper
Prime: Proper antiphon, with psalms of Sunday; Psalm 53 replaces 117; responsory Qui scandis super sidera; lectio brevis Viri Galilei
Hours: Proper antiphons, with psalms of Sunday; remainder proper
Vespers: Proper antiphons, with psalms of Sunday except that Psalm 116 is the fifth psalm; remainder proper
Compline: Of Sunday
In Tradition, the Ascension is always celebrated on Thursday, but the obligation to attend Mass is binding in the USA on Thursday only in ten ecclesiastical provinces (covering the entire territory of the states of New York, New Jersey, Pennsylvania, Connecticut, Rhode Island, Massachusetts, Vermont, New Hampshire, Maine, and Nebraska).
For additional information, see Holy Days of Obligation in the USA in Rubrical FAQs.