First Day of School
Thu, August 6, 2026
Official district calendar Updated June 3, 2026 Official
Check first day, last day, month-by-month dates, printable PDF, and calendar subscription links for Mt. Diablo Unified School District. The school year runs from Aug 6, 2026 to Jun 2, 2027.
Thu, August 6, 2026
Mon, September 7, 2026
Mon, October 12, 2026
Wed, November 11, 2026
Nov 23-27, 2026
Dec 21, 2026 - Jan 1, 2027
Mon, January 18, 2027
Mon, February 15, 2027
Wed, March 31, 2027
Apr 5-12, 2027
Mon, May 31, 2027
Wed, June 2, 2027
| Event | Date(s) | Status |
|---|---|---|
| First Day of School | Thu, August 6, 2026 | School Opens |
| Labor Day | Mon, September 7, 2026 | No School |
| Indigenous Peoples' Day | Mon, October 12, 2026 | No School |
| Veterans Day | Wed, November 11, 2026 | No School |
| Thanksgiving Break | Nov 23-27, 2026 | No School |
| Winter Break | Dec 21, 2026 - Jan 1, 2027 | No School |
| Martin Luther King Jr. Day | Mon, January 18, 2027 | No School |
| Presidents' Day | Mon, February 15, 2027 | No School |
| Cesar Chavez Day | Wed, March 31, 2027 | No School |
| Spring Break | Apr 5-12, 2027 | No School |
| Memorial Day | Mon, May 31, 2027 | No School |
| Last Day of School | Wed, June 2, 2027 | School Closes |
Complete month-by-month calendar for Mt. Diablo Public Schools. Every day is color-coded so you can see school days, holidays, and breaks at a glance.
Mt. Diablo Unified School District in 2026-2027 opens on the earlier side of the school-year cycle on Aug 6, 2026 and runs into the first week of June on Jun 2, 2027. The longest no-school windows highlighted here are Thanksgiving Break (Nov 23-27, 2026), Winter Break (Dec 21, 2026 - Jan 1, 2027), and Spring Break (Apr 5-12, 2027). Spring Break stretches into an April recess window.
For families comparing calendars, the useful takeaways are that the early start can affect summer camp, childcare, and back-to-school travel timing, the early-June finish keeps the year close to the standard late-spring wrap-up pattern, and Thanksgiving is shown as a full-week break. Taken together, those dates can change the best timing for trips, camps, or backup care.
Outside those major breaks, there are a couple of standalone no-school days worth watching. The notes also flag conference-related minimum days that can shorten the student week. This calendar also calls out district-specific closures such as Indigenous Peoples' Day and Cesar Chavez Day. The smaller schedule details worth a closer look include named schedule items such as Student Holiday.
The dates here are hand-reviewed from district calendar materials by CA School Calendar; check the official district calendar page if the district posts a late revision.
Mt. Diablo Unified School District starts school on Aug 6, 2026 and the student year ends on Jun 2, 2027.
Spring Break runs from Apr 5-12, 2027, which makes it one of the longer spring recess windows in this batch of districts.
The calendar continues to list Indigenous Peoples' Day and Cesar Chavez Day alongside the standard statewide holidays.
Mt. Diablo Unified School District starts school on Aug 6, 2026 for 2026-2027, which is an early-August opening by California district standards.
Thanksgiving Break: Nov 23-27, 2026. Winter Break: Dec 21, 2026 - Jan 1, 2027. Spring Break: Apr 5-12, 2027
Data Source: This calendar is compiled from the official Mt. Diablo Unified School District calendar PDF.
Disclaimer: This website is not affiliated with Mt. Diablo Unified School District or the California Department of Education. While we strive for accuracy, always verify important dates with the official district website.