Official School Calendar for Academic Year 2026-2027
San Mateo Union High School District 2026–27 calendar dates
| Date | Event |
|---|---|
| Aug 10, 2026 | Fall Semester Begins (Teachers) |
| Aug 12, 2026 | Fall Semester Begins (Students) |
| Aug 10, 2026 | Professional Development Day |
| Sep 7, 2026 | Labor Day |
| Sep 10, 2026 | Back to School Night |
| Sep 11, 2026 | Minimum Day |
| Sep 18, 2026 | 6-Week Marking Period |
| Oct 12, 2026 | Professional Development Day |
| Oct 30, 2026 | 6-Week Marking Period |
| Nov 11, 2026 | Veterans Day (Observance) |
| Nov 25, 2026 | Staff Recess (No School for Students) |
| Nov 26-27, 2026 | Thanksgiving Days |
| Dec 16-17, 2026 | Minimum Day |
| Dec 18, 2026 | 6-Week Marking Period |
| Dec 18, 2026 | Fall Semester Ends (Students) |
| Dec 21, 2026 - Jan 5, 2027 | Winter Recess |
| Jan 5, 2027 | Fall Semester Ends (Teachers) |
| Jan 6, 2027 | Spring Semester Begins (Teachers) |
| Jan 6, 2027 | Spring Semester Begins (Students) |
| Jan 18, 2027 | Martin Luther King Jr. Day |
| Jan 25-26, 2027 | Professional Development Day |
| Feb 15, 2027 | Presidents' Day |
| Feb 19, 2027 | 6-Week Marking Period |
| Mar 11, 2027 | Open House |
| Mar 12, 2027 | Minimum Day |
| Mar 29 - Apr 2, 2027 | Spring Recess |
| Apr 9, 2027 | 6-Week Marking Period |
| May 25-27, 2027 | Minimum Day |
| May 27, 2027 | Spring Semester Ends (Students) |
| May 28, 2027 | Spring Semester Ends (Teachers) |
| May 31, 2027 | Memorial Day |
San Mateo Union High School District Calendar 26-27 Revised FAQs
When is the first day of school for San Mateo Union High School District Calendar 2026-2027?
The first day of school for students in San Mateo Union High School District for the 2026-2027 school year is August 12, 2026.
When is Spring Break in San Mateo Union High School District Calendar 2026-2027?
Spring Break in San Mateo Union High School District for the 2026-2027 school year is from March 29, 2027 through April 2, 2027.
When is Christmas Break in San Mateo Union High School District Calendar 2026-2027?
Christmas Break in San Mateo Union High School District for the 2026-2027 school year begins on December 21, 2026.
When is Winter Break in San Mateo Union High School District Calendar 2026-2027?
Winter Break in San Mateo Union High School District for the 2026-2027 school year is from December 21, 2026 to January 5, 2027.
When is Thanksgiving Break in San Mateo Union High School District Calendar 2026-2027?
Thanksgiving Break in San Mateo Union High School District for the 2026-2027 school year is on November 26-27, 2026.
What is the last day of school in San Mateo Union High School District Calendar 2026-2027?
The last day of school for students in San Mateo Union High School District for the 2026-2027 school year is May 27, 2027.
When is Labor Day in San Mateo Union High School District Calendar 2026-2027?
Labor Day in San Mateo Union High School District for the 2026-2027 school year is September 7, 2026.
When is Martin Luther King Jr. Day in San Mateo Union High School District Calendar 2026-2027?
Martin Luther King Jr. Day in San Mateo Union High School District for the 2026-2027 school year is January 18, 2027.
When is Presidents' Day in San Mateo Union High School District Calendar 2026-2027?
Presidents' Day in San Mateo Union High School District for the 2026-2027 school year is February 15, 2027.
When is Memorial Day in San Mateo Union High School District Calendar 2026-2027?
Memorial Day in San Mateo Union High School District for the 2026-2027 school year is May 31, 2027.
Dates can change after publication. Read our calendar disclaimer.