Heritage High SchoolSchool Calendar

2026-27 Academic Calendar

Key dates, holidays, and events for Heritage High School.

School at a Glance
Upcoming events & academic holidays
2026-27 Academic Year

AUG

17

New Teacher Workday

AUG

18

All STCS District Employees PD

AUG

19

All Teacher Workday

AUG

24

All Teacher Workday

AUG

25

First Day of School

AUG

28

No School
No School

SEP

4

Labor Day Break

OCT

5

No School
Teacher PD-No School for Students

OCT

14

Parent/Teacher Conferences-1/2 Day PM off for Students

NOV

6

Elementary Record Workday-Elementary 1/2 Day PM off

NOV

10

No School
Teacher PD-No School for Students

NOV

25

Thanksgiving Break

DEC

21

Winter Break

FEB

26

No School
No School
View Full 2026-27 Calendar
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 Heritage High School.

National Tests

August 7, 2026

SAT — National

Registration deadline

August 11, 2026

SAT — National

Late registration deadline

August 14, 2026

ACT — National

Registration deadline

August 22, 2026

SAT — National

Test date

August 28, 2026

SAT — National

Registration deadline

September 1, 2026

ACT — National

Late registration deadline
+63 more national tests this school year

State Assessments

January 25, 2027 – March 26, 2027

WIDA ACCESS

Testing window
MI

January 25, 2027 – March 26, 2027

WIDA Alternate ACCESS

Testing window
MI

April 5, 2027 – May 14, 2027

M-STEP — Grade 11 - Science and Social Studies (MME)

Testing window
MI

April 5, 2027 – April 30, 2027

M-STEP — Paper/Pencil

Testing window
MI

April 5, 2027 – May 21, 2027

MI-Access Alternate Assessment

Testing window
MI

April 5, 2027 – April 30, 2027

Michigan Merit Exam (MME) — SAT with Essay

Testing window
MI
+2 more state assessments this school year
See the full national test & school calendar