Horizons Alternative - School District Calendar - MT. Diablo Unified - 2021-2022

This MT. Diablo Unified instructional academic school calendar is extremely important as it keeps you informed of Horizons Alternative grading periods, early dismissal dates, staff development days and holidays for the Horizons Alternative calendar school year 2021-2022. 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 MT. Diablo Unified 2021-2022 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.