For the 2026–2027 school year, the district serves 30,000 students across 50 schools in Northern California, California. Classes begin August 5, 2026 and end June 10, 2027, with 180 instructional days planned. All dates listed below are sourced from the district's official publications. Verify with Mt Diablo Unified School District before scheduling around them.
Visual Calendar
Official Calendar Images
Official calendar scans for Mt Diablo Unified School District. Click any page to open the full-size image.
School Calendar
Interactive Calendar
Mt Diablo Unified School District's 2026–2027 academic calendar — holidays, breaks, and key dates.
Month by Month Calendar
About the District
School Information
Details and contact information for Mt Diablo Unified School District MDUSD.
Sources and Checks
Where these dates come from
How the 2026–2027 Mt Diablo Unified School District calendar on this page was compiled and what to re-check before you rely on it.
- ✓District publication. Dates are taken from the calendar Mt Diablo Unified School District published for 2026–2027, shown as images on this page.
- ✓Official website. Cross-checked against mdusd.org.
- ✓Board-approved version is used where the district marks one.
- ✓First and last day match the published calendar.
- ✓Breaks and holidays are listed with their full date ranges.
- ✓Teacher / no-school days are included where the district lists them.
- ✓Changes happen. Districts amend calendars mid-year — confirm with Mt Diablo Unified School District before booking around a date.
Common Questions
Frequently Asked Questions
Mt Diablo Unified School District Calendar 2026–2027 — important dates and answers.
The first day of school in Mt Diablo Unified School District for the 2026-2027 school year is August 5, 2026.
Thanksgiving break in Mt Diablo Unified School District runs from November 23 to November 27, 2026.
Winter break in Mt Diablo Unified School District begins on December 21, 2026 and ends on January 1, 2027.
Christmas break is part of the winter recess in Mt Diablo Unified School District and takes place from December 21, 2026 through January 1, 2027.
Spring break in Mt Diablo Unified School District is scheduled from April 5 to April 9, 2027.
The last day of school in Mt Diablo Unified School District for the 2026-2027 school year is June 10, 2027.
No school days include Labor Day on September 7, 2026, Indigenous Peoples’ Day on October 12, 2026, Veterans Day on November 11, 2026, Martin Luther King Jr. Day on January 18, 2027, Lincoln Day on February 12, 2027, Presidents’ Day on February 15, 2027, and Memorial Day on May 31, 2027.
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Recently Updated Calendars
Other California school district calendars — recently added or updated.