Visual Calendar
Official calendar scans for San Mateo Union High School District SMUHSD. Click any image to open full-screen.
School Calendar
Download San Mateo Union High School District SMUHSD's 2026–2027 academic calendar PDF — holidays, breaks, and key dates.
For the 2026–2027 school year, the district serves 8,700 students across 11 schools in California. The 2026–2027 academic year includes 180 instructional days. All dates listed below are sourced from the district's official publications. Verify with San Mateo Union High School District SMUHSD before scheduling around them.
About the District
Details and contact information for San Mateo Union High School District SMUHSD (HSD).
Common Questions
San Mateo Union High School District SMUHSD Calendar 2026–2027 — important dates and answers.
The first day of school for students in San Mateo Union High School District for the 2026-2027 school year is August 12, 2026.
Spring Break in San Mateo Union High School District for the 2026-2027 school year is from March 29, 2027 through April 2, 2027.
Christmas Break in San Mateo Union High School District for the 2026-2027 school year begins on December 21, 2026.
Winter Break in San Mateo Union High School District for the 2026-2027 school year is from December 21, 2026 to January 5, 2027.
Thanksgiving Break in San Mateo Union High School District for the 2026-2027 school year is on November 26-27, 2026.
The last day of school for students in San Mateo Union High School District for the 2026-2027 school year is May 27, 2027.
Labor Day in San Mateo Union High School District for the 2026-2027 school year is September 7, 2026.
Martin Luther King Jr. Day in San Mateo Union High School District for the 2026-2027 school year is January 18, 2027.
Presidents' Day in San Mateo Union High School District for the 2026-2027 school year is February 15, 2027.
Memorial Day in San Mateo Union High School District for the 2026-2027 school year is May 31, 2027.
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