Jefferson City HighSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Jefferson City High.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
AUG
24
School Starts
SEP
7
No School
Labor Day
SEP
25
Staff Professional Development
OCT
12
Staff Compensation Day
NOV
9
Staff Professional Development
NOV
23
No School
Thanksgiving Break
DEC
22
3 Hour Early Release for Students
DEC
23
No School
Winter Break
JAN
1
No School
Winter Break
JAN
18
No School
Martin Luther King, Jr. Day
FEB
12
Staff Professional Development
FEB
15
No School
Presidents’ Day
MAR
22
No School
Spring Break
MAR
26
Staff Compensation Day
MAY
20
Last Day of School – 3 Hour Early Release for Students
MAY
21
JCHS To Host State Track Meet
MAY
28
JCHS To Host State Track Meet
MAY
31
No School
Memorial 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 Jefferson City 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