See the Community High School District 99 2023-2024 Academic Calendar

Find out the important dates on the Glenbard Township High School District 87 calendar.

School calendars can be a great resource for families to have on hand while they’re planning their year. From holiday breaks to professional development days, here is the 2023-24 school calendar as approved by the Community High School District 99.

Important 2023-2024 school year dates

A few key dates you’ll want to bookmark:

  • First Day of School: Aug. 21, 2023
  • Winter Break: Dec. 22, 2023–Jan. 5, 2024
  • Spring Break: March 25-29, 2024
  • Last Day of School: May 23, 2024

2023-2024 Lake Zurich Community Unit School District 95 Calendar

August 2023

  • First Day of School: Aug. 21, 2023

September 2023

  • Labor Day (District Closed): Sep. 4, 2023

October 2023

  • Teacher Conferences (No Student Attendance): Oct. 6, 2023
  • Non-Attendance Day: Oct. 9, 2023

November 2023

  • Thanksgiving Break: Nov. 22-23, 2023

December 2023

  • Winter Break: Dec. 22, 2023 – Jan. 5, 2024

January 2024

  • Teacher Institute (No Student Attendance): Jan. 8, 2024
  • Martin Luther King’s Birthday (No School): Jan. 15, 2024

February 2024

  • Presidents’ Day (No School): Feb. 19, 2024

March 2024

  • County Institute Day (No Student Attendance): March 1, 2024
  • Spring Break: March 25-29, 2024

May 2024

  • Graduation: May 19, 2024
  • Last Day of School: May 23, 2024
  • Teacher Institute: May 24, 2024
  • Memorial Day (No School): May 27, 2024
  • Emergency Days (Cancelled if Not Used): May 28-June 3, 2024

See the full calendar at csd99.org.


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Chicago Parent Editorial Team
Chicago Parent Editorial Team
Since 1984, the Chicago Parent editorial team is trained to be the go-to source for Chicagoland families, offering a rich blend of expert advice, compelling stories, and the top local activities for kids. Renowned for their award-winning content, the team of editors and writers are dedicated to enriching family life by connecting parents with the finest resources and experiences our community has to offer.

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