Holy Days of obligation, Catholics are obliged to participate in Mass on these days:
The Feast of Mary, the Mother of God
January 1st
Ascension
40 days after Easter Sunday
The Assumption of the Blessed Virgin Mary
August 15th
All Saints Day
November 1st
The Feast of the Immaculate Conception
Check the bulletin for Mass dates and times.
Christmas Day
December 25th
Easter Sunday
Check the bulletin for Mass dates and times.
Check the bulletin for more information on Holy Days including Mass dates and times.