San Dimas High - School District Calendar - Bonita Unified - 2026-2027

This Bonita Unified instructional academic school calendar is extremely important as it keeps you informed of San Dimas High grading periods, early dismissal dates, staff development days and holidays for the San Dimas High calendar school year 2026-2027. As a parent and or student, you will find yourself needing this information on a regular basis, so please "like" and bookmark this page in a visible location within your favorite browser. The legend for this Bonita Unified 2026-2027 calendar is at the bottom of the page. If you are browsing on your PC there is another copy of the legend in the right hand column.