Clayton HighSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Clayton High.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
DEC
22
End of First Semester
DEC
23
Winter Break
JAN
1
Winter Break
JAN
5
Classes Resume
MAR
9
Parent-Teacher Conferences
MAR
15
Spring Break
JUN
3
Last Day of School for Students
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 Clayton 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
October 1, 2026 – October 30, 2026
PSAT 8/9 — Fall
Testing window
October 1, 2026 – October 30, 2026
PSAT/NMSQT — Fall
Testing window
October 1, 2026 – October 30, 2026
SAT — School Day - Fall
Testing window
October 16, 2026
SAT — National
Score release
State Assessments
September 14, 2026 – December 18, 2026
MAP-Alternate Assessment — MAP-A
Testing window
MO
February 1, 2027 – May 21, 2027
MAP-Alternate Assessment — MAP-A
Testing window
MO