In the Catholic Church, Holy Days of Obligation (also called holydays, holidays, or days of obligation) are days on which "the faithful are to refrain from engaging in work or activities that hinder the worship owed to God, the joy proper to the Lord's Day, the performance of the works of mercy, and the appropriate relaxation of mind and body.

Family needs or important social service can legitimately excuse from the obligation of Sunday rest.

The faithful should see to it that legitimate excuses do not lead to habits prejudicial to religion, family life, and health" [CCC 2185].

January 1: The Feast of Mary, the Holy Mother of God
Masses:
· Monday, Dec. 31 at 5:00pm (vigil) 
· Tuesday, Jan. 1 at 10:00am 
 
May 21: Ascension of the Lord (40 days after Easter Sunday)
Masses:
· Wednesday, May 20 at 6:30pm (vigil)
· Thursday, May 21 at 8:30am and 6:30pm

August 16: Assumption of the Blessed Virgin Mary
Abrogated from August 15
Masses:
· Saturday, August 15 at 5:00pm (vigil)
· All Masses on Sunday, August 16
 
November 1: All Saints' Day
Masses:
· Saturday, October 31 at 5:00pm (vigil) 
· All Masses on Sunday, November 1

December 8: The Solemnity of the Immaculate Conception
Masses: 
· Monday, December 7 at 6:30pm (vigil)
· Tuesday, December 8 at 8:30am and 6:30pm

December 25: Christmas, the Nativity of Our Lord
Vigil Masses on Thursday, December 24 at:
· 4:00pm
· 6:00pm
· 8:00pm
· 12:00 Midnight
Masses on Friday, December 25:
· 7:30am
· 9:30am
· 11:30am