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
AUG
10
Teacher Institute Day - No Student Attendance
AUG
12
First Day of Grades 1-12 Student Attendance
AUG
13
First Day of Kindergarten Attendance
AUG
17
First Day of Franklin Preschool Attendance
SEP
7
No School
Labor Day - No School
OCT
9
End of 1st Quarter Full Day Teacher Institute - No Student Attendance
OCT
12
No School
Columbus Day - No School
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
Partner 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
July 1, 2026 – July 31, 2026
AP Score Release — All
Score release
July 21, 2026
ACT
Score release
August 14, 2026
ACT
Registration deadline
August 15, 2026
SAT — National
Test date
August 22, 2026
SAT — National
Test date
August 29, 2026 – September 12, 2026
SAT Score Release Date
Score release