2026-27 Hinsdale Township High School District 86 Calendar

August 2026

• HTHSD: New Educator Orientation

  Tue, Aug 4, 2026 - Thu, Aug 6, 2026

  New Educator Orientation (Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Institute Days

  Mon, Aug 10, 2026 - Tue, Aug 11, 2026

  Institute Days (Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: First Semester Begins

  Wed, Aug 12, 2026

  First Semester August 12-December 17

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: First Day of School

  Wed, Aug 12, 2026

  School year begins August 12, 2026

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Aug 19, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Aug 26, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Curriculum Night

  Thu, Aug 27, 2026

  Curriculum Night

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

September 2026

• HTHSD: Early Release Wednesday

  Wed, Sep 2, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: No School, Labor Day

  Mon, Sep 7, 2026

  Labor Day (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Sep 9, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Sep 16, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Sep 23, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Sep 30, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

October 2026

• HTHSD: Fall Conferences

  Thu, Oct 8, 2026

  Fall Conferences

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Dismissal

  Thu, Oct 8, 2026

  Early Dismissal - 12:35 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Fall Testing

  Fri, Oct 9, 2026

  District Testing: Fall Testing

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: No School, Columbus/Indigenous Peoples' Day

  Mon, Oct 12, 2026

  Columbus/Indigenous Peoples' Day (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Oct 14, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Oct 21, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Oct 28, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

November 2026

• HTHSD: No School, Election Day

  Tue, Nov 3, 2026

  Election Day (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: District Improvement Day

  Fri, Nov 6, 2026

  District Improvement Days. Student Dismissal 12:35 pm; District Collaboration 12:50 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Nov 11, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Nov 18, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: No School, Thanksgiving Break

  Wed, Nov 25, 2026 - Fri, Nov 27, 2026

  Thanksgiving Break (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

December 2026

• HTHSD: Early Release Wednesday

  Wed, Dec 2, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Dec 9, 2026

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: 1st Semester Final Exams

  Tue, Dec 15, 2026 - Thu, Dec 17, 2026

  1st Semester Final Exams

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: First Semester Ends

  Thu, Dec 17, 2026

  First Semester August 12-December 17

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Emergency Day

  Fri, Dec 18, 2026

  Shaded red on calendar grid; one of 5 Emergency Days

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: No School, Winter Break

  Fri, Dec 18, 2026 - Fri, Jan 1, 2027

  Winter Break (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

January 2027

• HTHSD: No School for Students, Institute Day

  Mon, Jan 4, 2027

  Institute Days (Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Second Semester Begins

  Tue, Jan 5, 2027

  Second Semester January 5-May 28

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Jan 13, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: No School, Martin Luther King Day

  Mon, Jan 18, 2027

  Martin Luther King Day (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Jan 20, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: District Improvement Day

  Fri, Jan 29, 2027

  District Improvement Days. Student Dismissal 12:35 pm; District Collaboration 12:50 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

February 2027

• HTHSD: Early Release Wednesday

  Wed, Feb 3, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Feb 10, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: No School, Non-Attendance Day

  Fri, Feb 12, 2027

  Non-attendance days (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: No School, President's Day

  Mon, Feb 15, 2027

  President's Day (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Feb 17, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Spring Conferences

  Thu, Feb 25, 2027

  Spring Conferences

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: No School for Students, Institute Day

  Fri, Feb 26, 2027

  Institute Days (Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

March 2027

• HTHSD: Early Release Wednesday

  Wed, Mar 3, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: District Improvement Day

  Fri, Mar 12, 2027

  District Improvement Days. Student Dismissal 12:35 pm; District Collaboration 12:50 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Mar 17, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Mar 24, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Dismissal

  Fri, Mar 26, 2027

  Early Dismissal - 12:35 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: No School, Spring Break

  Mon, Mar 29, 2027 - Fri, Apr 2, 2027

  Spring Break (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

April 2027

• HTHSD: Early Release Wednesday

  Wed, Apr 7, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Spring PreACT/ACT (ISBE)

  Wed, Apr 14, 2027 - Thu, Apr 15, 2027

  District Testing: Spring PreACT/ACT (ISBE)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: No School, Non-Attendance Day

  Fri, Apr 16, 2027

  Non-attendance days (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Apr 21, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, Apr 28, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

May 2027

• HTHSD: AP Exams

  Mon, May 3, 2027 - Fri, May 14, 2027

  AP Exams

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, May 5, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, May 12, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Early Release Wednesday

  Wed, May 19, 2027

  Early Release Wednesdays. Student Dismissal 1:55 pm; Building Collaboration 2:15 - 3:15 pm

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Graduation

  Thu, May 20, 2027

  Graduation

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: 2nd Semester Final Exams

  Wed, May 26, 2027 - Fri, May 28, 2027

  2nd Semester Final Exams

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Second Semester Ends

  Fri, May 28, 2027

  Second Semester January 5-May 28

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Last Day of School

  Fri, May 28, 2027

  If emergency days are not utilized, the last day of school will be May 28. School year ends June 4 2027 if emergency days are used.

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

• HTHSD: Memorial Day

  Mon, May 31, 2027

  Memorial Day (Holidays - Student Non-Attendance Days)

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.

June 2027

• HTHSD: Emergency Days

  Tue, Jun 1, 2027 - Fri, Jun 4, 2027

  Emergency Days. School year ends June 4 2027 if emergency days are used; otherwise last day is May 28.

  Created from the 2026-27 Hinsdale Township High School District 86 Calendar, Hinsdale, IL.