For the 2026–2027 school year, the district serves 5,200 students across 9 schools in Illinois. Classes begin August 20, 2026 and end June 3, 2027, with 180 instructional days planned. All dates listed below are sourced from the district's official publications. Verify with Arlington Heights School District 25 before scheduling around them.
Visual Calendar
Official Calendar Images
Official calendar scans for Arlington Heights School District 25. Click any page to open the full-size image.
School Calendar
Interactive Calendar
Arlington Heights School District 25's 2026–2027 academic calendar — holidays, breaks, and key dates.
Month by Month Calendar
About the District
School Information
Details and contact information for Arlington Heights School District 25 D25.
Sources and Checks
Where these dates come from
How the 2026–2027 Arlington Heights School District 25 calendar on this page was compiled and what to re-check before you rely on it.
- ✓District publication. Dates are taken from the calendar Arlington Heights School District 25 published for 2026–2027, shown as images on this page.
- ✓Official website. Cross-checked against sd25.org.
- ✓Board-approved version is used where the district marks one.
- ✓First and last day match the published calendar.
- ✓Breaks and holidays are listed with their full date ranges.
- ✓Teacher / no-school days are included where the district lists them.
- ✓Changes happen. Districts amend calendars mid-year — confirm with Arlington Heights School District 25 before booking around a date.
Common Questions
Frequently Asked Questions
Arlington Heights School District 25 Calendar 2026–2027 — important dates and answers.
The first day of school is Thursday, August 20, 2026.
Spring break is from Monday, March 22, 2027 through Friday, March 26, 2027.
Christmas break falls during winter break from Monday, December 21, 2026 through Friday, January 1, 2027.
Winter break is from Monday, December 21, 2026 through Friday, January 1, 2027.
Thanksgiving break is from Monday, November 23, 2026 through Friday, November 27, 2026, with Thanksgiving Day on November 26, 2026.
The last day of school is Thursday, June 3, 2027.
Labor Day is observed on Monday, September 7, 2026, and schools are closed.
Martin Luther King Jr. Day is on Monday, January 18, 2027, and schools are closed.
Memorial Day is on Monday, May 31, 2027, and schools are closed.
Parent-teacher conferences are scheduled for October 22–23, 2026 and February 12, 2027.
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Recently Updated Calendars
Other Illinois school district calendars — recently added or updated.