For the 2026–2027 school year, the district serves 1,900 students across 4 schools in Illinois. Classes begin August 17, 2026 and end May 21, 2027, with 180 instructional days planned. All dates listed below are sourced from the district's official publications. Verify with Clinton Unit School District #15 before scheduling around them.
Visual Calendar
Official Calendar Images
Official calendar scans for Clinton Unit School District #15. Click any page to open the full-size image.
School Calendar
Interactive Calendar
Clinton Unit School District #15's 2026–2027 academic calendar — holidays, breaks, and key dates.
Month by Month Calendar
About the District
School Information
Details and contact information for Clinton Unit School District #15 USD.
Sources and Checks
Where these dates come from
How the 2026–2027 Clinton Unit School District #15 calendar on this page was compiled and what to re-check before you rely on it.
- ✓District publication. Dates are taken from the calendar Clinton Unit School District #15 published for 2026–2027, shown as images on this page.
- ✓Official website. Cross-checked against cusd15.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 Clinton Unit School District #15 before booking around a date.
Common Questions
Frequently Asked Questions
Clinton Unit School District #15 Calendar 2026–2027 — important dates and answers.
The first day of school for students in Clinton Unit School District #15 is August 17, 2026. Students will be dismissed at 1:30 PM on the first day.
Spring Break is scheduled from March 26 through April 2, 2027. Classes resume on April 5, 2027, following a Teacher Institute Day.
Christmas Break (Holiday Break) begins on December 21, 2026 and continues through January 1, 2027.
The district's Winter Break is the Holiday Break from December 21, 2026, through January 1, 2027.
Thanksgiving Break is scheduled for November 25-27, 2026. There will be no school during these dates.
The last day of school is May 21, 2027. Students will be dismissed at 1:30 PM.
Labor Day is observed on September 7, 2026, and there is no school.
There is no school on October 12, 2026, in observance of Columbus Day.
Parent-Teacher Conferences are scheduled on October 1, October 13, October 27, October 29, November 17, and November 19, 2026.
The first quarter ends on October 16, 2026.
The second quarter ends on December 18, 2026, which is also a 1:30 PM dismissal day.
The third quarter ends on March 5, 2027.
There is no school on January 18, 2027, in observance of Martin Luther King Jr. Day.
Presidents' Day is observed on February 15, 2027, and there is no school.
Memorial Day is observed on May 31, 2027. There is no school on this day.
Yes. Teacher Institute days are scheduled on August 13-14, September 28, 2026, January 4, April 5, and May 24, 2027. Students do not attend school on these dates.
Yes. Early dismissal at 1:30 PM is scheduled on August 17, September 16, October 21, December 2, December 18, February 3, March 10, March 25, April 21, and May 21, 2027.
Yes. Emergency make-up days, if needed, are scheduled from May 25 through June 1, 2027.
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Other Illinois school district calendars — recently added or updated.