Acalanes Union High School Calendar 2025-2026
Acalanes Union High is a public school district in California serving 5,389 students. This page covers the 2025-2026 school year with day-level calendar data.
This district is part of the San Francisco-Oakland-Fremont, CA metropolitan area.
5,389
Enrollment
174
School Days
44
Break Days
2025-2026
School Year
Calendar Summary
First Day of School
August 12, 2025
Last Day of School
May 29, 2026
NCES District ID
0601650
State
California
Breaks & Holidays
Scheduled breaks and holidays for Acalanes Union High during 2025-2026 (excludes weekends and summer):
| Break | Start | End | Days |
|---|---|---|---|
| Staff Development Day | Aug 6 | Aug 7 | 2 |
| Institute Day | Aug 8 | Aug 8 | 1 |
| Walk-Thru Registration Day / Optional Teacher Work Day | Aug 11 | Aug 11 | 1 |
| Labor Day (District Holiday) | Sep 1 | Sep 1 | 1 |
| End Of 1St Quarter | Oct 10 | Oct 10 | 1 |
| Non School Day | Oct 13 | Oct 13 | 1 |
| Veteran'S Day | Nov 11 | Nov 11 | 1 |
| Thanksgiving Break | Nov 24 | Nov 28 | 5 |
| 1St Semester Finals | Dec 16 | Dec 18 | 3 |
| 1St Semester Finals / End Of First Semester | Dec 19 | Dec 19 | 1 |
| Winter Break | Dec 23 | Dec 30 | 6 |
| Winter Break (Continued) | Jan 1 | Jan 2 | 2 |
| Optional Teacher Work Day | Jan 5 | Jan 5 | 1 |
| Martin Luther King, Jr. Day | Jan 20 | Jan 20 | 1 |
| Potential Weather / Emergency Make-Up Day | Feb 13 | Feb 13 | 1 |
| Presidents' Day Weekend / Holiday | Feb 14 | Feb 15 | 2 |
| Winter Break | Feb 16 | Feb 16 | 1 |
| End Of 3Rd Quarter | Mar 13 | Mar 13 | 1 |
| Staff Development Day (Non-School Day) | Mar 16 | Mar 16 | 1 |
| Spring Break | Mar 30 | Mar 30 | 1 |
| Spring Break (Start) | Mar 31 | Mar 31 | 1 |
| Spring Break (Continued) | Apr 1 | Apr 2 | 2 |
| Spring Break | Apr 3 | Apr 3 | 1 |
| Memorial Day (District Holiday) | May 25 | May 25 | 1 |
| 2Nd Semester Finals | May 26 | May 28 | 3 |
| Optional Teacher Workday | Jun 1 | Jun 1 | 1 |
| Juneteenth | Jun 19 | Jun 19 | 1 |
School Year Calendar
Visual calendar for Acalanes Union High, July 2025 through June 2026:
Jul 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |
| 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | 31 |
Aug 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||
| 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Sep 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 |
Oct 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 | 31 |
Nov 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | |||||
| 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 24 | 25 | 26 | 27 | 28 | 29 | 30 |
Dec 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 | 31 |
Jan 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |||
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 | 31 |
Feb 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | ||||||
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 | 25 | 26 | 27 | 28 |
Mar 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | ||||||
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 | 25 | 26 | 27 | 28 | 29 |
| 30 | 31 |
Apr 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 |
May 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||
| 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Jun 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 |
In SessionBreak/HolidayWeekend
Multi-Year Comparison
Calendar data across school years for Acalanes Union High:
| School Year | First Day | Last Day | School Days | Break Days |
|---|---|---|---|---|
| 2024-2025 | Aug 13 | May 30 | 180 | 33 |
| 2025-2026 | Aug 12 | May 29 | 174 | 44 |
| 2026-2027 | Aug 11 | May 28 | 187 | 29 |
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