Share with Parents
Help other parents find this calendar
School Break
Spring Recess
Mar 30 - Apr 3
Next 7 Days
2 days offApril 2026
Coming Up
School Breaks
Holidays (No School)
The San Mateo Union High School District school calendar for the 2025-26 school year runs from Wednesday, August 13, 2025 to Thursday, May 28, 2026 in California.
- •3 scheduled breaks and 6 holidays throughout the year
- •Spring break: Mar 30 – Apr 3
- •Winter break: Dec 22 – Jan 5
San Mateo Union High School District starts school around the same time as most California districts. Winter break matches the most common California schedule, starting 12/22.
Download the iCal file above to sync all San Mateo Union High School District dates with your phone or computer.
Frequently Asked Questions
Is San Mateo Union High School District school open today?
No, San Mateo Union High School District is currently on Spring Recess (Mar 30 - Apr 3).
When is the next day off for San Mateo Union High School District?
The next day off is Monday, May 25, 2026 for Memorial Day.
When is the first day of school for San Mateo Union High School District?
The first day of school for San Mateo Union High School District in 2025-26 is Wednesday, August 13, 2025.
When is the last day of school for San Mateo Union High School District?
The last day of school for San Mateo Union High School District in 2025-26 is Thursday, May 28, 2026.
When is spring break for San Mateo Union High School District?
Spring break for San Mateo Union High School District is Monday, March 30, 2026 to Friday, April 3, 2026.
When is winter break for San Mateo Union High School District?
Winter break for San Mateo Union High School District is Monday, December 22, 2025 to Monday, January 5, 2026.
When do students go back to school after winter break?
Students in San Mateo Union High School District return to school after winter break on Tuesday, January 6, 2026. Winter break ends on Monday, January 5, 2026.
When is Thanksgiving break for San Mateo Union High School District?
Thanksgiving break for San Mateo Union High School District is Thursday, November 27, 2025 to Friday, November 28, 2025.
How do I add San Mateo Union High School District calendar to my phone?
Click the "Add to Calendar" button at the top of this page to download the iCal (.ics) file. Then:
iPhone/iPad: Tap the downloaded file, then tap "Add All" to add events to your Calendar app.
Android: Open the file with Google Calendar, review the events, and tap "Import".
Google Calendar (web): Go to Settings → Import & Export → Select the .ics file → Import.
Outlook: Double-click the file or drag it into your Outlook calendar.
Apple Calendar (Mac): Double-click the file or go to File → Import → select the .ics file.
Get Calendar Alerts
We'll email you when San Mateo Union High School District updates their calendar.
Other California Districts
Last updated: December 19, 2025
Source: San Mateo Union High School District Official Calendar