What are the Holy Days of Obligation in the USA, excluding Sundays?

Canon law lists nine holy days of obligation, but allows national conferences of bishops to suppress some holy days of obligation. The U.S. bishops decided to remove the obligation for the solemnity of St. Joseph (March 19) and the solemnity of Sts. Peter and Paul (June 29), and to always celebrate the Epiphany on a Sunday. The remaining six holy days of obligation in the U.S. are: Mary, Mother of God (January 1), the Ascension of Our Lord (the Thursday of the Sixth Week of Easter), The Assumption of the Blessed Virgin Mary (August 15), All Saints Day (November 1), and Christmas (December 25). In many provinces in the United States, the feast of the Ascension has been moved to Sunday.