K12Cal

US school district academic calendars

California

Ontario-Montclair Calendar

Ontario-Montclair is a public school district in Ontario, 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 17,944 students in Ontario.

School year covered: 2026-27. The year-specific record is the Ontario-Montclair 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

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Ontario-Montclair 2026-27 calendar dates
DateEventApplies toNotes
First day of schoolAll students—
Thanksgiving breakAll students—
Winter breakAll students—
Last day of schoolAll 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 Ontario-Montclair start school in 2026-27?

Ontario-Montclair starts school on Wednesday, August 5, 2026.

When is the last day of school for Ontario-Montclair in 2026-27?

The last day of school is Thursday, May 20, 2027.

When is thanksgiving break for Ontario-Montclair?

Thanksgiving break is November 23–27, 2026.

When is winter break for Ontario-Montclair?

Winter break is December 18, 2026 – January 1, 2027.

When is the next break for Ontario-Montclair?

As of October 20, 2026, the next break is Thanksgiving break, November 23–27, 2026.

Does Ontario-Montclair list early release days in 2026-27?

The verified 2026-27 calendar does not list early release days.

These dates are for Ontario-Montclair only. For the state directory, see California school district calendars.