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Cook County School District 104 IL Calendar 26-27

  • 2026/27
  • Illinois
  • 5 teacher days

The Cook County School District 104 2026–27 school year runs from Aug 19, 2026 to Jun 2, 2027. Breaks include Thanksgiving break Nov 26, winter break Dec 23 - Jan 8, and spring break Mar 22-29. The table below lists all teacher workdays, early release days, and holidays. Download the PDF calendar, or read the FAQs.

School year starts Wed, Aug 19, 2026 First Day of School (Grades 1-8)
School year ends Wed, Jun 2, 2027 Last Day of School (Early Dismissal 1:00 PM)
Next key date Wed, Aug 19, 2026 Counts down once the school year is under way

Cook County School District 104 2026-27 calendar

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Cook County School District 104 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
  • Early release / half day
  • Parent-teacher conference
  • Grading period / report cards
  • Weather make-up day
  • Other scheduled date

August 2026

  • Aug 10-12, 2026 — New Teacher Orientation
  • Aug 17, 2026 — Opening Day Teacher Institute #1
  • Aug 18, 2026 — Teacher Institute #2
  • Aug 19, 2026 — First Day of School (Grades 1-8)
  • Aug 19-20, 2026 — Kindergarten Orientation/Screening

September 2026

  • Sep 7, 2026 — Labor Day (No School)

October 2026

  • Oct 9, 2026 — Teacher Institute #3
  • Oct 12, 2026 — Indigenous Peoples Day (No School)

November 2026

  • Nov 13, 2026 — End of 1st Trimester
  • Nov 20, 2026 — Report Cards Sent Home
  • Nov 23, 2026 — Parent/Teacher Conferences (No School)
  • Nov 24, 2026 — SIP/PLCs
  • Nov 25, 2026 — Non-Attendance Day (No School)

December 2026

  • Dec 23, 2026 - Jan 8, 2027 — Winter Break (No School)

January 2027

  • Dec 23, 2026 - Jan 8, 2027 — Winter Break (No School)
  • Jan 11, 2027 — Classes Resume Following Winter Break
  • Jan 18, 2027 — Martin Luther King Jr. Day (No School)

February 2027

  • Feb 15, 2027 — President's Day (No School)
  • Feb 25, 2027 — End of 2nd Trimester
  • Feb 26, 2027 — Teacher Institute #4

March 2027

  • Mar 1, 2027 — Casimir Pulaski Day (No School)
  • Mar 5, 2027 — Report Cards Sent Home
  • Mar 19, 2027 — Early Dismissal (1:50 PM)
  • Mar 22-29, 2027 — Spring Break (No School)
  • Mar 30, 2027 — Classes Resume Following Spring Break

April 2027

May 2027

  • May 31, 2027 — Memorial Day (No School)

June 2027

  • Jun 2, 2027 — Last Day of School (Early Dismissal 1:00 PM)
  • Jun 3-9, 2027 — Emergency Days (XED)

July 2027

Cook County School District 104 teacher and staff days 2026/27

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

  • Aug 10-12, 2026 New Teacher Orientation District source
  • Aug 17, 2026 Opening Day Teacher Institute #1 District source
  • Aug 18, 2026 Teacher Institute #2 District source
  • Oct 9, 2026 Teacher Institute #3 District source
  • Feb 26, 2027 Teacher Institute #4 District source

Cook County School District 104 breaks and holidays

School is closed to students on these dates.

  • Sep 7, 2026 Labor Day (No School) Holiday
  • Oct 12, 2026 Indigenous Peoples Day (No School) Holiday
  • Nov 25, 2026 Non-Attendance Day (No School) Holiday
  • Nov 26, 2026 Thanksgiving (No School) Holiday
  • Nov 27, 2026 Non-Attendance Day (No School) Holiday
  • Dec 23, 2026 - Jan 8, 2027 Winter Break (No School) Break
  • Jan 11, 2027 Classes Resume Following Winter Break Break
  • Jan 18, 2027 Martin Luther King Jr. Day (No School) Holiday
  • Feb 15, 2027 President's Day (No School) Holiday
  • Mar 1, 2027 Casimir Pulaski Day (No School) Holiday
  • Mar 22-29, 2027 Spring Break (No School) Break
  • Mar 30, 2027 Classes Resume Following Spring Break Break
  • May 31, 2027 Memorial Day (No School) Holiday

Your checked 2026/27 Cook County School District 104 planning calendar

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

Useful now30 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 July 12, 2026.
Full term dates table

Cook County School District 104 2026–27 calendar dates

DateEvent
Aug 10-12, 2026New Teacher Orientation
Aug 17, 2026Opening Day Teacher Institute #1
Aug 18, 2026Teacher Institute #2
Aug 19, 2026First Day of School (Grades 1-8)
Aug 19-20, 2026Kindergarten Orientation/Screening
Aug 21, 2026Kindergarten First Day of School
Sep 7, 2026Labor Day (No School)
Oct 9, 2026Teacher Institute #3
Oct 12, 2026Indigenous Peoples Day (No School)
Nov 13, 2026End of 1st Trimester
Nov 20, 2026Report Cards Sent Home
Nov 23, 2026Parent/Teacher Conferences (No School)
Nov 24, 2026SIP/PLCs
Nov 25, 2026Non-Attendance Day (No School)
Nov 26, 2026Thanksgiving (No School)
Nov 27, 2026Non-Attendance Day (No School)
Dec 23, 2026 - Jan 8, 2027Winter Break (No School)
Jan 11, 2027Classes Resume Following Winter Break
Jan 18, 2027Martin Luther King Jr. Day (No School)
Feb 15, 2027President's Day (No School)
Feb 25, 2027End of 2nd Trimester
Feb 26, 2027Teacher Institute #4
Mar 1, 2027Casimir Pulaski Day (No School)
Mar 5, 2027Report Cards Sent Home
Mar 19, 2027Early Dismissal (1:50 PM)
Mar 22-29, 2027Spring Break (No School)
Mar 30, 2027Classes Resume Following Spring Break
May 31, 2027Memorial Day (No School)
Jun 2, 2027Last Day of School (Early Dismissal 1:00 PM)
Jun 3-9, 2027Emergency Days (XED)

Cook County School District 104 Calendar 26-27 Revised FAQs

When is the first day of school in Cook County School District 104 for 2026-2027?
The first day of school for students in Grades 1-8 is Wednesday, August 19, 2026. Kindergarten students begin school on Friday, August 21, 2026.
When is Spring Break in Cook County School District 104 for 2026-2027?
Spring Break is scheduled from Monday, March 22, 2027, through Monday, March 29, 2027. Classes resume on Tuesday, March 30, 2027.
When is Christmas Break in Cook County School District 104 for 2026-2027?
Christmas Break begins on Wednesday, December 23, 2026, and continues through Friday, January 8, 2027.
When is Winter Break in Cook County School District 104 for 2026-2027?
Winter Break runs from December 23, 2026, through January 8, 2027. Students return to school on Monday, January 11, 2027.
When is Thanksgiving Break in Cook County School District 104 for 2026-2027?
Thanksgiving Break includes Wednesday, November 25, 2026 (Non-Attendance Day), Thursday, November 26, 2026 (Thanksgiving), and Friday, November 27, 2026 (Non-Attendance Day). Classes resume on Monday, November 30, 2026.
When is the last day of school in Cook County School District 104 for 2026-2027?
The last day of school is Wednesday, June 2, 2027. Students will be dismissed early at 1:00 PM.
When is Labor Day in Cook County School District 104 for 2026-2027?
Labor Day is observed on Monday, September 7, 2026, and there is no school.
When is Indigenous Peoples Day in Cook County School District 104 for 2026-2027?
Indigenous Peoples Day is observed on Monday, October 12, 2026. There is no school on this day.
When does the first trimester end in Cook County School District 104 for 2026-2027?
The first trimester ends on Friday, November 13, 2026.
When are Parent-Teacher Conferences in Cook County School District 104 for 2026-2027?
Parent-Teacher Conferences are scheduled for Monday, November 23, 2026. There is no school for students on this day.
When is Martin Luther King Jr. Day in Cook County School District 104 for 2026-2027?
Martin Luther King Jr. Day is observed on Monday, January 18, 2027. Schools are closed.
When is Presidents Day in Cook County School District 104 for 2026-2027?
Presidents Day is observed on Monday, February 15, 2027. There is no school.
When does the second trimester end in Cook County School District 104 for 2026-2027?
The second trimester ends on Thursday, February 25, 2027.
When is Casimir Pulaski Day in Cook County School District 104 for 2026-2027?
Casimir Pulaski Day is observed on Monday, March 1, 2027. There is no school.
When is Memorial Day in Cook County School District 104 for 2026-2027?
Memorial Day is observed on Monday, May 31, 2027. Schools are closed.
Are emergency days included in the Cook County School District 104 Calendar 2026-2027?
Yes. The calendar designates June 3-9, 2027 as emergency (XED) days, which will only be used if emergency school closures occur during the school year.

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Cook County School District 104 calendar FAQs

When is the first day of school in Cook County School District 104 for 2026-2027?
The first day of school for students in Grades 1-8 is Wednesday, August 19, 2026. Kindergarten students begin school on Friday, August 21, 2026.
When is Spring Break in Cook County School District 104 for 2026-2027?
Spring Break is scheduled from Monday, March 22, 2027, through Monday, March 29, 2027. Classes resume on Tuesday, March 30, 2027.
When is Christmas Break in Cook County School District 104 for 2026-2027?
Christmas Break begins on Wednesday, December 23, 2026, and continues through Friday, January 8, 2027.
When is Winter Break in Cook County School District 104 for 2026-2027?
Winter Break runs from December 23, 2026, through January 8, 2027. Students return to school on Monday, January 11, 2027.
When is Thanksgiving Break in Cook County School District 104 for 2026-2027?
Thanksgiving Break includes Wednesday, November 25, 2026 (Non-Attendance Day), Thursday, November 26, 2026 (Thanksgiving), and Friday, November 27, 2026 (Non-Attendance Day). Classes resume on Monday, November 30, 2026.
When is the last day of school in Cook County School District 104 for 2026-2027?
The last day of school is Wednesday, June 2, 2027. Students will be dismissed early at 1:00 PM.
When is Labor Day in Cook County School District 104 for 2026-2027?
Labor Day is observed on Monday, September 7, 2026, and there is no school.
When is Indigenous Peoples Day in Cook County School District 104 for 2026-2027?
Indigenous Peoples Day is observed on Monday, October 12, 2026. There is no school on this day.
When does the first trimester end in Cook County School District 104 for 2026-2027?
The first trimester ends on Friday, November 13, 2026.
When are Parent-Teacher Conferences in Cook County School District 104 for 2026-2027?
Parent-Teacher Conferences are scheduled for Monday, November 23, 2026. There is no school for students on this day.
When is Martin Luther King Jr. Day in Cook County School District 104 for 2026-2027?
Martin Luther King Jr. Day is observed on Monday, January 18, 2027. Schools are closed.
When is Presidents Day in Cook County School District 104 for 2026-2027?
Presidents Day is observed on Monday, February 15, 2027. There is no school.
When does the second trimester end in Cook County School District 104 for 2026-2027?
The second trimester ends on Thursday, February 25, 2027.
When is Casimir Pulaski Day in Cook County School District 104 for 2026-2027?
Casimir Pulaski Day is observed on Monday, March 1, 2027. There is no school.
When is Memorial Day in Cook County School District 104 for 2026-2027?
Memorial Day is observed on Monday, May 31, 2027. Schools are closed.
Are emergency days included in the Cook County School District 104 Calendar 2026-2027?
Yes. The calendar designates June 3-9, 2027 as emergency (XED) days, which will only be used if emergency school closures occur during the school year.

Dates can change after publication. Read our calendar disclaimer.