Marston Middle - School District Calendar - San Diego Unified - 2025-2026

This San Diego Unified instructional academic school calendar is extremely important as it keeps you informed of Marston Middle grading periods, early dismissal dates, staff development days and holidays for the Marston Middle calendar school year 2025-2026. 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 San Diego Unified 2024-2025 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.