In addition to our regular Sunday obligation, we as Catholics are require to attend Mass on six additional days that the church has decreed as Holy Days of Obligation.
January 1* - Mary, Mother of God
May 26 - Ascension (Annually on the Thursday of the 6th Week of Easter)
August 15* - Assumption
November 1* - All Saints Day
December 8 - Immaculate Conception
December 25 - Christmas
*Whenever January 1, August 15 or November 1 falls on a Saturday or on a Monday, the obligation to attend Mass is abrogated.