Lynbrook HighSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Lynbrook High.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
SEP
7
Labor Day - no classes
OCT
12
Teacher Non-Duty Day - no classes
NOV
11
Veterans Day - no classes
NOV
25
Thanksgiving Break - no classes
DEC
21
Mid-Year Break - no classes
JAN
4
School resumes for second semester
JAN
18
Martin Luther King Day - no classes
FEB
15
President's Week - no classes
MAR
15
Non-Duty Day - no classes
APR
12
Spring Break - no classes
MAY
31
Memorial Day - no classes
JUN
3
Last day of the school year
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 Lynbrook 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
August 22, 2026
SAT — National
Test date
August 28, 2026
SAT — National
Registration deadline
September 1, 2026
ACT — National
Late registration deadline
September 1, 2026
SAT — National
Late registration deadline
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