Summer Registration Meetings With GLCs - July 7-31 First Day Of Fall Semester - Mon, Aug 11 MINIMUM DAY - Mon, Aug 11 Back-To-School Night - Thurs, Aug 21
VIDEO: 2025 Graduation Processional
Thursday, May 29, Diamond Bar High School held its 42nd COMMENCEMENT CEREMONY. There were 651 graduates in the Class of 2025.