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

Sep 1 Tue
- GRAY: B. 2, 4, 6, 8
  Block Schedule
Sep 2 Wed
- RED: B. 1, 3, 5, 7
  Block Schedule
Sep 3 Thu
- GRAY: B. 2, 4, 6, 8
  Block Schedule
Sep 4 Fri
- RED (Rally Schedule): B. 1, 3, 5, 7
  Block Schedule
Sep 7 Mon
- No School - Labor Day
  Block Schedule
Sep 8 Tue
- GRAY (Pair Day - Early Dismissal): B. 2, 4, 6, 8
  Block Schedule
Sep 9 Wed
- RED: B. 1, 3, 5, 7
  Block Schedule
Sep 10 Thu
- GRAY: B. 2, 4, 6, 8
  Block Schedule
Sep 11 Fri
- No School - Diocesan Convocation
  Block Schedule
Sep 14 Mon
- RED: B. 1, 3, 5, 7
  Block Schedule
- Office Hour 2:30 PM – 3:30 PM
  Block Schedule
Sep 15 Tue
- GRAY: B. 2, 4, 6, 8
  Block Schedule
Sep 16 Wed
- RED (Pair Day - Early Dismissal): B. 1, 3, 5, 7
  Block Schedule
Sep 17 Thu
- GRAY (Mass Schedule): B. 2, 4, 6, 8
  Block Schedule
Sep 18 Fri
- RED: B. 1, 3, 5, 7
  Block Schedule
Sep 21 Mon
- FLEX DAY (8 AM - 2:30 PM)
  Block Schedule
Sep 22 Tue
- GRAY: B. 2, 4, 6, 8
  Block Schedule
Sep 23 Wed
- RED: B. 1, 3, 5, 7
  Block Schedule
Sep 24 Thu
- GRAY: B. 2, 4, 6, 8
  Block Schedule
Sep 25 Fri
- RED (Pair Day - Early Dismissal): B. 1, 3, 5, 7
  Block Schedule
Sep 28 Mon
- GRAY (Special Schedule): B. 2, 4, 6, 8
  Block Schedule
- Office Hour 2:30 PM – 3:30 PM
  Block Schedule
Sep 29 Tue
- RED: B. 1, 3, 5, 7
  Block Schedule
Sep 30 Wed
- GRAY: B. 2, 4, 6, 8
  Block Schedule

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

Calendars

Diocesan Events
Home Campus
Counseling
Academics
Activities
Block Schedule
Athletics
Admissions
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