Collinsville High SchoolSchool Calendar
2025-26 Academic Calendar
Key dates, holidays, and events for Collinsville High School.
School at a Glance
Upcoming events & academic holidays2025-26 Academic Year
AUG
13
No School
Institute Days – No School
AUG
14
No School
Institute Days – No School
AUG
17
1st Day of Student Attendance
SEP
7
No School
Labor Day Holiday – No School
SEP
18
No School
Institute Day – No School
OCT
9
No School
Columbus Day – No School
NOV
11
No School
Veteran's Day Holiday – No School
NOV
25
No School
Thanksgiving Break – No School
DEC
21
No School
Winter Break – No School
JAN
19
No School
Martin Luther King Day – No School
FEB
15
No School
President's Day – No School
MAR
29
No School
Spring Break – No School
MAY
28
Last Day of Student Attendance
MAY
31
Memorial Day
JUN
1
Institute Days
Partner TipEarly dismissal days and parent-teacher conferences are often updated 2 weeks in advance. Check back regularly to stay ahead of the schedule!