Jackson Sr. HighSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Jackson Sr. High.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
AUG
21
No School
No School/Staff Work Day
AUG
24
First Day of Classes
SEP
7
No School
No School/Labor Day
OCT
5
No School
No School/Professional Development
NOV
2
No School
No School/Parent Teacher Conference
NOV
3
No School
No School/Professional Development
NOV
23
No School
No School/Thanksgiving Break
DEC
18
End of First Semester
DEC
21
No School
No School/Winter Break
JAN
4
No School
No School/Staff Work Day
JAN
5
School Resumes
JAN
18
No School
No School/Martin Luther King Birthday
FEB
15
No School
No School/President's Day
MAR
5
No School
No School/Professional Development
MAR
26
No School
No School/Parent Teacher Conference
MAR
29
No School
No School/Spring Break
MAY
21
High School Graduation 7:00 PM
MAY
26
Last Day of School
MAY
27
Teacher Work Day
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 Jackson Sr. 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
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