For the 2026–2027 school year, the district serves 30,000 students across 50 schools in California. The school year starts August 6, 2026, with 180 instructional days planned. All dates listed below are sourced from the district's official publications. Verify with Mt.diablo Unified School District Mdusd before scheduling around them.
Visual Calendar
Official Calendar Images
Official calendar scans for Mt.diablo Unified School District Mdusd. Click any page to open the full-size image.
School Calendar
Interactive Calendar
Mt.diablo Unified School District Mdusd'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 Mdusd 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 Mdusd 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 Mdusd before booking around a date.
Common Questions
Frequently Asked Questions
Mt.diablo Unified School District Mdusd Calendar 2026–2027 — important dates and answers.
The first student day for MT.DIABLO UNIFIED SCHOOL DISTRICT Calendar 2026-2027 is August 6, 2026.
Spring Recess in MT.DIABLO UNIFIED SCHOOL DISTRICT Calendar 2026-2027 is from April 5-12, 2027.
Christmas Holiday in MT.DIABLO UNIFIED SCHOOL DISTRICT Calendar 2026-2027 is on December 25, 2026.
Winter Recess in MT.DIABLO UNIFIED SCHOOL DISTRICT Calendar 2026-2027 is from December 21, 2026 to January 1, 2027.
Thanksgiving break in MT.DIABLO UNIFIED SCHOOL DISTRICT Calendar 2026-2027 is from November 23-27, 2026.
The last student day for MT.DIABLO UNIFIED SCHOOL DISTRICT Calendar 2026-2027 is June 2, 2027.
Labor Day is observed on September 7, 2026.
Memorial Day is observed on May 31, 2027.
School resumes after Fall Recess on October 13, 2026.
School resumes after Winter Recess on January 4, 2027.
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Other California school district calendars — recently added or updated.