May 19 Baseball: Wesclin – IHSA Class 2A Central Regional 4:30 pm Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
May 20 Girls Soccer: Althoff – IHSA Class 1A Central Regional Championship 5:00 pm The Campus (former Lindenwood University) 2300 W Main St, Belleville Event Details Get Directions
May 21 Semester Exams: 6 and 8 All Day Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
May 21 Softball (V): Flora – IHSA Class 2A Flora Regional Semifinal 6:30 pm Flora High School 600 S Locust St, Flora Event Details Get Directions
May 22 Semester Exams: 1, 2 and 7 All Day Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
May 22 Early Dismissal (11:34 a.m.) 8:10 am - 11:34 am Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
May 22 Boys Track: IHSA Class 1A Chester Sectional 1:00 pm Chester High School 1901 Swanwick Street, Chester Event Details Get Directions
May 23 End of Fourth Quarter & Second Semester All Day Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
May 23 Semester Exams: 3 and 4/5 All Day Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
May 23 Early Dismissal (10:24 a.m.) 8:10 am - 10:24 am Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
May 27 Fathers & Friends Meeting 7:00 pm Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
May 30 Golf Classic All Day Governors Run Golf Course 3300 Governors Drive, Carlyle Event Details Get Directions
May 31 Golf Classic All Day Governors Run Golf Course 3300 Governors Drive, Carlyle Event Details Get Directions
Jun 30 Fathers & Friends Meeting 7:00 pm Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
Jul 28 Fathers & Friends Meeting 7:00 pm Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
Aug 8 Girls Golf (JV-V): Central, Highland, and Roxana 3:30 pm Bent Oak Golf Course 1725 South Broadway, Breese Event Details Get Directions
Aug 12 Faculty Mass & Meeting 8:00 am - 2:50 pm Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
Aug 13 Book Pickup Day (Picture Day) 8:00 am - 3:00 pm Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
Aug 13 New Parent Orientation 7:00 pm - 8:30 pm Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
Aug 14 First Day for Freshmen 8:10 am - 2:50 pm Mater Dei Catholic High School 900 North Mater Dei Drive, Breese Event Details Get Directions
