Mater Dei High School
Build The Future

About MD
Mater Dei is a distinguished destination of excellence in academics and technology, the arts, faith and service, campus life, and athletics. We are proud to be Orange County’s oldest and largest Catholic high school.
Admissions
Your journey to becoming a Monarch starts here! Tour campus, schedule a shadow day, begin your application, and more. We are excited for you to join the MD family!
Programs
Built on Catholic fellowship and intellectual rigor, our programs in academics, technology, athletics, faith and service, and the arts provide unlimited opportunities for student success. Comprehensive counseling and wellness resources educate and bolster families throughout the high school journey.
Faith in Action
Guided by the articulation of Catholic Social Teachings, Mater Dei prioritizes the faith development of our students with an emphasis on Christian service. We believe this allows our students to grow in their spiritual lives while living our gospel values through giving back to others and truly experiencing the face of God.
Campus Life
Through avenues of leadership, faith, shared interests, and extracurricular activities and events, students can make Mater Dei their own. Get involved today!
Community
Tradition never graduates. Alumni, lifetime parents, grandparents, and friends are a vital and vibrant aspect of our community. Once a Monarch, always a Monarch.
Giving

Events

Dec 1 Tue
- GRAY: B. 2, 4, 6, 8
  Block Schedule
Dec 2 Wed
- RED: B. 1, 3, 5, 7
  Block Schedule
Dec 3 Thu
- GRAY: B. 2, 4, 6, 8
  Block Schedule
Dec 4 Fri
- RED: B. 1, 3, 5, 7
  Block Schedule
Dec 7 Mon
- GRAY: B. 2, 4, 6, 8
  Block Schedule
- Office Hour 2:30 PM – 3:30 PM
  Block Schedule
Dec 8 Tue
- RED (Mass Schedule): B. 1, 3, 5, 7
  Block Schedule
Dec 9 Wed
- GRAY (Pair Day - Early Dismissal): B. 2, 4, 6, 8
  Block Schedule
Dec 10 Thu
- RED: B. 1, 3, 5, 7
  Block Schedule
Dec 11 Fri
- GRAY: B. 2, 4, 6, 8
  Block Schedule
Dec 14 Mon
- FLEX DAY (8 AM - 2:30 PM)
  Block Schedule
Dec 15 Tue
- Semester Exams (Blocks 7 & 8)
  Block Schedule
Dec 16 Wed
- Semester Exams (Blocks 3 & 4)
  Block Schedule
Dec 17 Thu
- Semester Exams (Blocks 5 & 6)
  Block Schedule
Dec 18 Fri
- Semester Exams (Blocks 1 & 2)
  Block Schedule
Dec 21 Mon
- No School - Christmas Break
  Block Schedule
Dec 22 Tue
- No School - Christmas Break
  Block Schedule
Dec 23 Wed
- No School - Christmas Break
  Block Schedule
Dec 24 Thu
- No School - Christmas Break
  Block Schedule
Dec 25 Fri
- No School - Christmas Break
  Block Schedule
Dec 28 Mon
- No School - Christmas Break
  Block Schedule
Dec 29 Tue
- No School - Christmas Break
  Block Schedule
Dec 30 Wed
- No School - Christmas Break
  Block Schedule
Dec 31 Thu
- No School - Christmas Break
  Block Schedule

Events in December 2026
Su	Mo	Tu	We	Th	Fr	Sa
	3 events •••	One event •	One event •	One event •	One event •
	2 events ••	One event •	One event •	One event •	One event •
	One event •	One event •	One event •	One event •	One event •
	One event •	One event •	One event •	One event •	One event •
	One event •	One event •	One event •	One event •	One event •

Calendars

Diocesan Events
Home Campus
Counseling
Academics
Activities
Block Schedule
Athletics
Admissions
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