Visual Calendar
Official calendar scans for Castro Valley Unified School District. Click any image to open full-screen.
Official Document
The official calendar PDF published by Castro Valley Unified School District. Download or view inline.
School Calendar
Month-by-month view of Castro Valley Unified School District's 2026–2027 academic calendar — holidays, breaks, and key dates.
About the District
Details and contact information for Castro Valley Unified School District.
Common Questions
Castro Valley Unified School District Calendar 2026–2027 — important dates and answers.
The first day of school in Castro Valley Unified School District for the 2026-2027 academic year is August 5, 2026.
Spring Break in Castro Valley Unified School District is scheduled from March 29 to April 2, 2027.
Christmas Break in Castro Valley Unified School District runs from December 21, 2026 through January 1, 2027.
Winter Break in Castro Valley Unified School District is from December 21, 2026 to January 1, 2027.
Thanksgiving Break in Castro Valley Unified School District takes place from November 23 to November 27, 2026.
The last day of school in Castro Valley Unified School District for the 2026-2027 school year is May 28, 2027.
Labor Day will be observed on September 7, 2026 in Castro Valley Unified School District.
Presidents Day Break in Castro Valley Unified School District is scheduled from February 15 through February 19, 2027.
Martin Luther King Jr. Day will be observed on January 18, 2027 in Castro Valley Unified School District.
Memorial Day will be observed on May 31, 2027 in Castro Valley Unified School District.
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