Please note that the Catholic faithful are to attend Mass to fulfill their worship obligations for both the 4th Sunday of Advent on the weekend of December 23rd and 24th AND also for the Solemnity of Christmas this year.The Christmas Mass is as follows: 
Christmas Vigil Mass is Sunday, Dec. 24th at 5:00 p.m.. 
The Solemnity of Christmas begins with a series of Lessons & Carols at 11:15 p.m.on Christmas Eve with Midnight Mass following.
Monday Christmas Day Masses are 9:30 a.m. and 11:30 a.m. in English and 4:00 p.m. in Spanish

The Holy Day of Mary the Mother of God will be celebrated on Monday, January 1st at 9:30 a.m. in English.     An all night Prayer Vigil before the Most Blessed Sacrament with adoration and intercessory prayer for God's blessings upon this New Year will begin at 5:00 p.m. on Sunday, Dec. 31st. Closing Benediction will be celebrated at 9:15 a.m. on Monday, January 1st.

Note that Saturday, Dec. 23 5:00pm Mass and Sunday, Dec. 24 Masses at 9:30am and 3:00pm will fulfill the 4th Sunday of Advent obligation.