Home / School calendars / Illinois / Community High School District CSD99 IL Calendar 26-27

Illinois school calendar

Community High School District CSD99 IL Calendar 26-27

  • 2026/27
  • Illinois
  • 4 teacher days

The Community High School District CSD99 2026–27 school year runs from Aug 14, 2026 to Jan 1, 2027. Breaks include Thanksgiving break Nov 24-27, winter break Dec 18, and spring break Mar 25. The table below lists all teacher workdays and holidays. Download the PDF calendar, or read the FAQs.

School year starts Fri, Aug 14, 2026 First Day of School
School year ends Fri, Apr 2, 2027 Last Day of Spring Break
Next key date Fri, Aug 14, 2026 Counts down once the school year is under way

Community High School District CSD99 2026-27 calendar

Select a thumbnail to open it full size, zoom in, or download it.

Community High School District CSD99 school year calendar

Every published date for 2026–27, colour-coded by what happens that day.

  • First day of school
  • Last day of school
  • Holiday - school closed
  • Break / vacation
  • Teacher / professional day
  • Parent-teacher conference
  • Grading period / report cards
  • Graduation
  • Weather make-up day
  • Other scheduled date

August 2026

  • Aug 12-13, 2026 — Teacher Institute - No Student Attendance
  • Aug 14, 2026 — First Day of School

September 2026

  • Sep 7, 2026 — Labor Day - No School

October 2026

  • Oct 12, 2026 — Non-Attendance Day - No School

November 2026

  • Nov 23, 2026 — Teacher Conferences - No Student Attendance
  • Nov 24-27, 2026 — Thanksgiving Recess - No School

December 2026

  • Dec 18, 2026 — End of First Semester
  • Dec 18, 2026 — Winter Break Begins

January 2027

  • Jan 1, 2027 — Last Day of Winter Break
  • Jan 4, 2027 — Teacher Institute - No Student Attendance
  • Jan 5, 2027 — Classes Resume
  • Jan 18, 2027 — Martin Luther King Jr. Day - No School

February 2027

  • Feb 15, 2027 — Presidents' Day - No School
  • Feb 26, 2027 — County Institute Day - No Student Attendance

March 2027

  • Mar 25, 2027 — Spring Break Begins

April 2027

  • Apr 2, 2027 — Last Day of Spring Break
  • Apr 5, 2027 — Classes Resume

May 2027

  • May 16, 2027 — Graduation
  • May 21, 2027 — End of Second Semester
  • May 24, 2027 — Teacher Institute - No Student Attendance
  • May 25-28, 2027 — Emergency Days
  • May 31, 2027 — Memorial Day - No School

June 2027

  • Jun 1, 2027 — Emergency Day
  • Jun 19, 2027 — Juneteenth Observance - No School

July 2027

Community High School District CSD99 teacher and staff days 2026/27

Students normally stay home on these days. Confirm with the district before making plans.

  • Aug 12-13, 2026 Teacher Institute - No Student Attendance District source
  • Jan 4, 2027 Teacher Institute - No Student Attendance District source
  • Feb 26, 2027 County Institute Day - No Student Attendance District source
  • May 24, 2027 Teacher Institute - No Student Attendance District source

Community High School District CSD99 breaks and holidays

School is closed to students on these dates.

  • Sep 7, 2026 Labor Day - No School Holiday
  • Oct 12, 2026 Non-Attendance Day - No School Holiday
  • Nov 24-27, 2026 Thanksgiving Recess - No School Break
  • Dec 18, 2026 Winter Break Begins Break
  • Jan 18, 2027 Martin Luther King Jr. Day - No School Holiday
  • Feb 15, 2027 Presidents' Day - No School Holiday
  • Mar 25, 2027 Spring Break Begins Break
  • May 31, 2027 Memorial Day - No School Holiday
  • Jun 19, 2027 Juneteenth Observance - No School Holiday

Your checked 2026/27 Community High School District CSD99 planning calendar

How these dates are put together, and what to double-check before you book anything.

Useful now24 published dates for the 2026–27 school year, laid out month by month.
CheckedTaken from the district’s own published calendar, not retyped from memory.
Kept currentLast updated April 30, 2026.
Full term dates table

Community High School District CSD99 2026–27 calendar dates

DateEvent
Aug 12-13, 2026Teacher Institute - No Student Attendance
Aug 14, 2026First Day of School
Sep 7, 2026Labor Day - No School
Oct 12, 2026Non-Attendance Day - No School
Nov 23, 2026Teacher Conferences - No Student Attendance
Nov 24-27, 2026Thanksgiving Recess - No School
Dec 18, 2026End of First Semester
Dec 18, 2026Winter Break Begins
Jan 1, 2027Last Day of Winter Break
Jan 4, 2027Teacher Institute - No Student Attendance
Jan 5, 2027Classes Resume
Jan 18, 2027Martin Luther King Jr. Day - No School
Feb 15, 2027Presidents' Day - No School
Feb 26, 2027County Institute Day - No Student Attendance
Mar 25, 2027Spring Break Begins
Apr 2, 2027Last Day of Spring Break
Apr 5, 2027Classes Resume
May 16, 2027Graduation
May 21, 2027End of Second Semester
May 24, 2027Teacher Institute - No Student Attendance
May 25-28, 2027Emergency Days
May 31, 2027Memorial Day - No School
Jun 1, 2027Emergency Day
Jun 19, 2027Juneteenth Observance - No School

Community High School District 99 Calendar 2026-2027 FAQs

When is the first day of school in Community High School District 99 for 2026-2027?
The first day of school in Community High School District 99 for the 2026-2027 school year is August 14, 2026.
When is spring break in Community High School District 99 2026-2027?
Spring break begins on March 25, 2027 and ends on April 2, 2027.
When is Christmas break in Community High School District 99 2026-2027?
Christmas break starts on December 18, 2026 and continues through January 1, 2027.
When is winter break in Community High School District 99 2026-2027?
Winter break begins on December 18, 2026 and ends on January 1, 2027.
When is Thanksgiving break in Community High School District 99 2026-2027?
Thanksgiving break runs from November 24 through November 27, 2026.
When is the last day of school in Community High School District 99 2026-2027?
The last scheduled day of school is May 21, 2027, unless emergency days are used, which could extend the school year to June 1, 2027.
When do classes resume after winter break in Community High School District 99 2026-2027?
Classes resume on January 5, 2027 after winter break.
When is Labor Day holiday in Community High School District 99 2026-2027?
Labor Day is observed on September 7, 2026, and there is no school on this day.
When is Martin Luther King Jr. Day in Community High School District 99 2026-2027?
Martin Luther King Jr. Day is on January 18, 2027, and there is no school.
When is Presidents' Day in Community High School District 99 2026-2027?
Presidents' Day is observed on February 15, 2027, with no school.
When is graduation in Community High School District 99 2026-2027?
Graduation is scheduled for May 16, 2027.
When does the second semester end in Community High School District 99 2026-2027?
The second semester ends on May 21, 2027.

Useful next steps

Switch school, download the calendar, or compare against other districts in Illinois.

All Illinois calendars Download this calendar School supply list Switch state

Community High School District CSD99 calendar FAQs

When is the first day of school in Community High School District 99 for 2026-2027?
The first day of school in Community High School District 99 for the 2026-2027 school year is August 14, 2026.
When is spring break in Community High School District 99 2026-2027?
Spring break begins on March 25, 2027 and ends on April 2, 2027.
When is Christmas break in Community High School District 99 2026-2027?
Christmas break starts on December 18, 2026 and continues through January 1, 2027.
When is winter break in Community High School District 99 2026-2027?
Winter break begins on December 18, 2026 and ends on January 1, 2027.
When is Thanksgiving break in Community High School District 99 2026-2027?
Thanksgiving break runs from November 24 through November 27, 2026.
When is the last day of school in Community High School District 99 2026-2027?
The last scheduled day of school is May 21, 2027, unless emergency days are used, which could extend the school year to June 1, 2027.
When do classes resume after winter break in Community High School District 99 2026-2027?
Classes resume on January 5, 2027 after winter break.
When is Labor Day holiday in Community High School District 99 2026-2027?
Labor Day is observed on September 7, 2026, and there is no school on this day.
When is Martin Luther King Jr. Day in Community High School District 99 2026-2027?
Martin Luther King Jr. Day is on January 18, 2027, and there is no school.
When is Presidents' Day in Community High School District 99 2026-2027?
Presidents' Day is observed on February 15, 2027, with no school.
When is graduation in Community High School District 99 2026-2027?
Graduation is scheduled for May 16, 2027.
When does the second semester end in Community High School District 99 2026-2027?
The second semester ends on May 21, 2027.

Dates can change after publication. Read our calendar disclaimer.