K12Cal

US school district academic calendars

California

Chaffey Joint Union High Calendar

Chaffey Joint Union High 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 22,628 students in Ontario.

School year covered: 2026-27. The year-specific record is the Chaffey Joint Union High calendar 2026-27.

At a glance

First day
Last day
Next break
None listed after October 20, 2026As of October 20, 2026, when this calendar was last verified.

2026-27 dates

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Chaffey Joint Union High 2026-27 calendar dates
DateEventApplies toNotes
First day of schoolAll 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 Chaffey Joint Union High start school in 2026-27?

Chaffey Joint Union High starts school on Wednesday, August 5, 2026.

When is the last day of school for Chaffey Joint Union High in 2026-27?

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

When is the next break for Chaffey Joint Union High?

As of October 20, 2026, the verified 2026-27 calendar does not list a later break.

Does Chaffey Joint Union High list early release days in 2026-27?

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

These dates are for Chaffey Joint Union High only. For the state directory, see California school district calendars.