Columbia Union School District Calendar 2026-2027

If you have been searching for “Columbia Union School District Calendar 2026-2027” then you are not alone. 

The school calendar is essential for schools to coordinate and communicate with all the students and parents of various classes and in different schools. Because of this, a school must maintain a proper calendar that delineates student and non-student days, school and non-school days, as well as the various breaks throughout the year.

This page contains the major holiday dates from the 2027 school calendar for Columbia Union School District in California.

Please check back regularly for any amendments that may occur, or consult the Columbia Union School District website for their 2026-2027 approved calendar. You may also wish to visit the school district homepage to check for any urgent or last-minute updates that may not have been incorporated into the official calendars.

Also note that we have incorporated non-student days such as teachers preparation days, teachers services days, and professional development days into the dates below. Visit the link above to view the full, original school calendar.

Columbia Union School District Calendar 2022-2023

📅 Columbia Union School District 2025-2026 Calendar Highlights

• The school calendar is officially board-approved on February 11, 2025.

• First day of school: August 20, 2025

• Trimester Dates:
    • First Trimester: August 20, 2025 – November 21, 2025
    • Second Trimester: December 1, 2025 – March 13, 2026
    • Third Trimester: March 16, 2026 – June 3, 2026

• Last day of school: June 3, 2026

• Winter Break: December 22, 2025 – December 31, 2025

• Spring Break: April 1 – April 3, 2026

• Early Release / Parent-Teacher Conference periods:
    • Fall: Parent/Teacher Conference (Early Release) sometime in November 2025
    • Spring: Parent/Teacher Conf (Early Release) in March 2026