The following is a list of the dates of the Holy Days of Obligation in the United States for 2010, as well as the dates of moveable feasts (holy days whose dates change from year to year). Please note that only those days that have "Holy Day of Obligation" listed beneath their entries are Holy Days of Obligation; all others are moveable feasts.
- Mary, Mother of God (Friday, January 1, 2010)
Holy Day of Obligation
- Ash Wednesday (Wednesday, February 17, 2010)
- Palm Sunday (Sunday, March 28, 2010)
- Holy Thursday (Thursday, April 1, 2010)
- Good Friday (Friday, April 2, 2010)
- Holy Saturday (Saturday, April 3, 2010)
- Easter Sunday (Sunday, April 4, 2010)
- Divine Mercy Sunday (Sunday, April 11, 2010)
- Ascension (Thursday, May 13, 2010)
Holy Day of Obligation (transferred to Sunday, May 16, 2010 in most dioceses of the United States)
- Pentecost Sunday (Sunday, May 23, 2010)
- Trinity Sunday (Sunday, May 30, 2010)
- Corpus Christi (Thursday, June 3, 2010; transferred to Sunday, June 6, 2010)
- Assumption of Mary (Sunday, August 15, 2010)
Holy Day of Obligation
- All Saints Day (Monday, November 1, 2010)
Holy Day of Obligation (abrogated because it falls on a Monday)
- First Sunday of Advent (Sunday, November 28, 2010)
Complete Advent schedule
- Immaculate Conception (Wednesday, December 8, 2010)
Holy Day of Obligation
- Christmas (Saturday, December 25, 2010)
Holy Day of Obligation
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