Mattoon High SchoolSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Mattoon High School.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
OCT
15
Full Day Student/Parent Teacher Conference & PD - No Student Attendance
NOV
11
No School
Veterans Day - No School
NOV
25
No School
Thanksgiving Break - No School
DEC
18
End of 2nd Quarter and 1st Semester
DEC
21
Winter Break
JAN
4
Teacher Institute Day - No Student Attendance
JAN
5
School Resumes for Students After Winter Break
JAN
18
No School
Martin Luther King Jr.’s Day - No School
FEB
10
Early Dismissal - School Improvement Day
FEB
15
No School
Presidents’ Day - No School
MAR
10
Early Dismissal - School Improvement Day
MAR
12
End of 3rd Quarter
MAR
22
Spring Break
MAR
29
Students Return from Spring Break
APR
14
Early Dismissal - School Improvement Day
MAY
15
High School Graduation
MAY
20
End of 4th Quarter and 2nd Semester; Last Student and Teacher Attendance Day; Early Dismissal
MAY
31
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 Mattoon High School.
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