Days on which Catholics are obligated to attend Mass:

Holy Days 2013

• The Solemnity of Mary, Mother of God
• Ascension - Thursday, May 9, 2013 (Transferred to Sunday, May 12)
• Assumption of the Blessed Virgin Mary - Thursday, August 15, 2013
• All Saints Day - Friday, November 1, 2013
• Immaculate Conception of the  Blessed Virgin Mary - Sunday, December 8, 2013
• Christmas – Nativity of the Lord - Wednesday, December 25, 2013