California
Mt. Diablo Unified Calendar
Mt. Diablo Unified is a public school district in Concord, California. This page publishes the 2026-27 academic calendar: the first day of school, the last day, student holidays, and breaks. K12Cal copies those dates from the district's official calendar and links the source. It does not set the calendar. It enrolls 29,356 students in Concord.
School year covered: 2026-27. The year-specific record is the Mt. Diablo Unified calendar 2026-27.
At a glance
- First day
- Last day
- Next break
- Thanksgiving break, November 23–27, 2026As of October 20, 2026, when this calendar was last verified.
2026-27 dates
The table scrolls sideways on small screens.
| Date | Event | Applies to | Notes |
|---|---|---|---|
| First day of school | All students | — | |
| Fall break | All students | — | |
| Thanksgiving break | All students | — | |
| Winter break | All students | — | |
| Spring break | All students | — | |
| Last day of school | All students | — |
Official source
Last verified . Status: verified.
Not listed
- Early release days were not confirmed against the official source and are omitted.
- Other student holidays were not confirmed against the official source and are omitted.
Questions
When does Mt. Diablo Unified start school in 2026-27?
Mt. Diablo Unified starts school on Thursday, August 6, 2026.
When is the last day of school for Mt. Diablo Unified in 2026-27?
The last day of school is Wednesday, June 2, 2027.
When is fall break for Mt. Diablo Unified?
Fall break is October 5–9, 2026.
When is thanksgiving break for Mt. Diablo Unified?
Thanksgiving break is November 23–27, 2026.
When is winter break for Mt. Diablo Unified?
Winter break is December 21, 2026 – January 1, 2027.
When is spring break for Mt. Diablo Unified?
Spring break is April 5–12, 2027.
When is the next break for Mt. Diablo Unified?
As of October 20, 2026, the next break is Thanksgiving break, November 23–27, 2026.
Does Mt. Diablo Unified list early release days in 2026-27?
The verified 2026-27 calendar does not list early release days.
Other California calendars
These dates are for Mt. Diablo Unified only. For the state directory, see California school district calendars.
- ABC Unified calendar
- Anaheim Union High calendar
- Antelope Valley Union High calendar
- Capistrano Unified calendar
- Chaffey Joint Union High calendar
- Chula Vista Elementary calendar
- Clovis Unified calendar
- Elk Grove Unified calendar
- Fresno Unified calendar
- Garden Grove Unified calendar
- Irvine Unified calendar
- Lodi Unified calendar
- Long Beach Unified calendar
- Los Angeles Unified calendar
- Madera Unified calendar
- Manteca Unified calendar
- Montebello Unified calendar
- Moreno Valley Unified calendar
- Napa Valley Unified calendar
- Ontario-Montclair calendar
- Palmdale Elementary calendar
- Panama-Buena Vista Union calendar
- Placentia-Yorba Linda Unified calendar
- Sacramento City Unified calendar
- Saddleback Valley Unified calendar
- San Francisco Unified calendar
- San Jose Unified calendar
- Santa Maria-Bonita calendar
- Tustin Unified calendar