Ontario-Montclair School District Calendar 2026-2027

Ontario-Montclair School District starts school on August 5, 2026, earlier than 93 of the 103 other California districts we track (4 start the same day). Its spring break (Mar 29 to Apr 2, 2027) is the most common spring break week in California (34 of 100 districts we track). The last day of school is Thursday, May 20, 2027.

Checking today…

First dayWed, Aug 5, 2026

Last dayThu, May 20, 2027

Spring breakMar 29 to Apr 2, 2027back Mon, Apr 5, 2027

Winter breakDec 18 to Jan 1back Mon, Jan 4, 2027

All 2026-2027 dates

180 student days (district count) · Weekends are not listed. Past dates are dimmed.

Ontario-Montclair School District 2026-2027 District Calendar (all schools) dates
Date	Event
Wed, Aug 5, 2026	First day of school
Mon, Sep 7, 2026	Labor Day
Mon, Oct 5, 2026	Non-School Day
Fri, Nov 6, 2026	Early release
Wed, Nov 11, 2026	Veterans Day
Mon, Nov 23 to Fri, Nov 27, 2026	Thanksgiving Break · 5 school days off
Thu, Dec 17, 2026	Early release
Fri, Dec 18, 2026 to Fri, Jan 1, 2027	Winter Break · 11 school days off
Mon, Jan 18, 2027	Martin Luther King Jr. Day
Mon, Feb 8, 2027	Lincoln's Birthday
Mon, Feb 15, 2027	Presidents' Day
Fri, Mar 5, 2027	Early release
Mon, Mar 29 to Fri, Apr 2, 2027	Spring Break · 5 school days off
Fri, Apr 30, 2027	Early release
Thu, May 20, 2027	Last day of school

Download calendar (.ics) Add to Google Calendar Apple / Outlook

Subscribing keeps your calendar in sync: if the district changes a date, we update the feed.

Verified against Ontario-Montclair School District’s official 2026-2027 calendar on September 29, 2026 (board-approved on November 6, 2025). Confidence: High.

Source: Ontario-Montclair School District 2026-2027 District Calendar (PDF)

We fetch this document again every day and compare it with the version we verified; if the district changes it, the dates here are read again.

Note: Board approved Nov 6, 2025. Minimum days (report card): Nov 6 and Mar 5 for elementary schools; Dec 17 and Apr 30 for middle schools. Middle school parent conference weeks (Sep 28-Oct 2, Mar 1-5) and elementary parent conference weeks (Nov 16-20, Mar 22-26) are listed on the calendar, but they are counted as student days and not shown as no-school days; schedules during those weeks are not described. Teacher preparation days (Jul 30-Aug 4) come before the first day. Memorial Day (May 31) and Juneteenth (Jun 18) fall after the last day of school.

Break details

Long weekends in 2026-2027

Besides the breaks above, Ontario-Montclair School District students have 5 long weekends this school year: three or more days in a row without school.

Days off	Length	Why
Sat, Sep 5 to Mon, Sep 7	3 days	Labor Day
Sat, Oct 3 to Mon, Oct 5	3 days	Non-School Day
Sat, Jan 16 to Mon, Jan 18	3 days	Martin Luther King Jr. Day
Sat, Feb 6 to Mon, Feb 8	3 days	Lincoln's Birthday
Sat, Feb 13 to Mon, Feb 15	3 days	Presidents' Day

Nearby districts

Compare Ontario-Montclair School District with Upland Unified School District or any other district, with the days both are off.

District	First day	Spring break	Last day
Ontario-Montclair School District	Aug 5	Mar 29 to Apr 2	May 20
Upland Unified School District	Aug 24	Mar 29 to Apr 2	Jun 10
Bonita Unified School District	Aug 17	Mar 29 to Apr 2	Jun 3
Corona-Norco Unified School District	Aug 11	Mar 29 to Apr 2	Jun 4
Rowland Unified School District	Aug 10	Mar 29 to Apr 2	Jun 3
Placentia-Yorba Linda Unified School District	Aug 13	Mar 29 to Apr 2	May 27
Baldwin Park Unified School District	Aug 13	Mar 29 to Apr 2	Jun 3

Frequently asked questions

When is spring break 2027 for Ontario-Montclair School District?

Spring break is Mon, Mar 29 to Fri, Apr 2, 2027. The last day of school before it is Friday, March 26, 2027, and students return Monday, April 5, 2027.

When does the 2026-2027 school year start and end for Ontario-Montclair School District?

The first day of school is Wednesday, August 5, 2026 and the last day is Thursday, May 20, 2027, 180 student days in total.

Does Ontario-Montclair School District have early release days?

Yes, the calendar lists four early release days: Nov 6, Dec 17, Mar 5 and Apr 30.

When is winter break 2026 for Ontario-Montclair School District?

Winter break runs Fri, Dec 18, 2026 to Fri, Jan 1, 2027. Counting weekends, students are off 17 days in a row and go back Monday, January 4, 2027.

How long is Thanksgiving break in Ontario-Montclair School District?

5 school days: Mon, Nov 23 to Fri, Nov 27, 2026.

Where do these Ontario-Montclair School District dates come from?

Source: the district's “Ontario-Montclair School District 2026-2027 District Calendar”, checked on September 29, 2026. We link the document on this page; if the district changes it, we update the dates and the “verified” date.

Share this calendar

See a wrong date? Tell us

We check every report against the district's official calendar, usually within two days. You are reporting a date for Ontario-Montclair School District.

About the district: Ontario-Montclair School District is based in Ontario, California (San Bernardino County), with about 17,695 students in 34 schools (NCES Common Core of Data, 2024-25). District website: www.omsd.net. See all California school calendars.