Charles J. Colgan Sr. HighSchool Calendar
2026-27 Academic Calendar
Key dates, holidays, and events for Charles J. Colgan Sr. High.
School at a Glance
Upcoming events & academic holidays2026-27 Academic Year
AUG
19
No School
No School – Teacher Workday and Professional Development (No School for Students)
AUG
20
No School
No School – Teacher Workday and Professional Development (No School for Students)
AUG
21
No School
No School – Teacher Workday and Professional Development (No School for Students)
AUG
24
First day of school
AUG
24
First Day of School for Students
SEP
4
Labor Day weekend holiday
SEP
4
No School
No School – Labor Day Weekend Holiday (Schools and Offices Closed to the Public)
SEP
7
Labor Day holiday
SEP
7
No School
No School – Labor Day (Schools and Offices Closed)
SEP
21
Holiday
SEP
21
No School
No School – Yom Kippur Holiday (Schools and Offices Closed)
OCT
12
No School
No School – Professional Development Day (No School for Students)
OCT
12
Professional development day
OCT
30
Last Day of First Marking Period
NOV
2
No School
No School – Parent Conferences and Professional Development (No School for Students)
NOV
2
Parent conferences and professional development
NOV
3
No School
No School – Teacher Workday (No School for Students)
NOV
3
Teacher workday
NOV
11
No School
No School – Veterans Day (Schools and Offices Closed)
NOV
11
Veterans Day holiday
NOV
25
No School
No School – Thanksgiving Break (Schools and Offices Closed to the Public)
NOV
25
Thanksgiving break
NOV
26
No School
No School – Thanksgiving Holiday (Schools and Offices Closed)
NOV
26
Thanksgiving break
NOV
27
No School
No School – Thanksgiving Break (Schools and Offices Closed)
DEC
21
No School
No School – Winter Break (No School for Students)
DEC
21
Winter break for students and teachers
DEC
22
No School
No School – Winter Break (No School for Students)
DEC
23
No School
No School – Winter Break (Schools and Offices Closed)
DEC
24
No School
No School – Winter Break (No School for Students)
DEC
24
Winter break
DEC
25
No School
No School – Christmas (Schools and Offices Closed)
DEC
28
No School
No School – Winter Break (No School for Students)
DEC
29
No School
No School – Winter Break (No School for Students)
DEC
30
No School
No School – Winter Break (No School for Students)
DEC
31
No School
No School – Winter Break (No School for Students)
JAN
1
Winter break
JAN
4
School Reopens
JAN
18
Martin Luther King Jr. holiday
JAN
28
Teacher workday
JAN
29
Parent conferences and professional development
FEB
15
Presidents Day holiday
MAR
10
Holiday
MAR
22
Spring break for students and teachers
MAR
25
Spring break
MAR
29
Teacher workday
APR
16
Teacher workday
MAY
17
Holiday
MAY
31
Memorial Day holiday
JUN
17
Last day of school
JUN
18
Juneteenth holiday
JUN
21
Teacher workday
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 Charles J. Colgan 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