Walnut HighSchool Calendar
2025-26 Academic Calendar
Key dates, holidays, and events for Walnut High.
School at a Glance
Upcoming events & academic holidays2025-26 Academic Year
NOV
26
Thanksgiving Day
JAN
18
Martin Luther King Jr. Day
FEB
15
Presidents Day
MAY
27
Last Day of School
MAY
31
Memorial Day
JUN
18
Juneteenth
Calendar TipEarly dismissal days and parent-teacher conferences are often updated 2 weeks in advance. Check back regularly to stay ahead of the schedule!
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Walnut High.
National Tests
August 1, 2026 – November 30, 2026
ISEE — Fall Testing Season
Testing window
August 3, 2026 – June 30, 2027
SSAT — Flex Testing
Testing window
September 22, 2026
SAT — National
Late registration deadline
September 25, 2026
SAT — National
Score release
September 29, 2026
ACT — National
Late registration deadline
October 1, 2026 – October 30, 2026
PSAT 8/9 — Fall
Testing window
State Assessments
March 1, 2027 – June 30, 2027
CAASPP — Statewide Window
Testing window
CA
School Milestones
October 1, 2026 – October 15, 2026
Private School Affidavit Filing Window
Other
CA