For the 2026–2027 school year, the district serves 4,500 students across 6 schools in Illinois. Classes begin August 12, 2026 and end May 27, 2027, with 180 instructional days planned. All dates listed below are sourced from the district's official publications. Verify with O'Fallon Community Consolidated School District No. 90 before scheduling around them.
Visual Calendar
Official Calendar Images
Official calendar scans for O'Fallon Community Consolidated School District No. 90. Click any page to open the full-size image.
School Calendar
Interactive Calendar
O'Fallon Community Consolidated School District No. 90's 2026–2027 academic calendar — holidays, breaks, and key dates.
Month by Month Calendar
About the District
School Information
Details and contact information for O'Fallon Community Consolidated School District No. 90 CCSD.
Sources and Checks
Where these dates come from
How the 2026–2027 O'Fallon Community Consolidated School District No. 90 calendar on this page was compiled and what to re-check before you rely on it.
- ✓District publication. Dates are taken from the calendar O'Fallon Community Consolidated School District No. 90 published for 2026–2027, shown as images on this page.
- ✓Official website. Cross-checked against of90.net.
- ✓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 O'Fallon Community Consolidated School District No. 90 before booking around a date.
Common Questions
Frequently Asked Questions
O'Fallon Community Consolidated School District No. 90 Calendar 2026–2027 — important dates and answers.
The first day of school is August 12, 2026.
Spring break is from March 26, 2027 to April 2, 2027.
Christmas break falls within the winter break from December 21, 2026 to January 1, 2027.
Winter break is from December 21, 2026 through January 1, 2027.
Thanksgiving (Fall Break) is from November 25 through November 27, 2026.
The last day of school is May 20, 2027. If emergency days are used, it may extend to May 27, 2027.
School resumes on January 5, 2027.
Labor Day is observed on September 7, 2026, and there is no school.
Memorial Day is on May 31, 2027.
Parent-teacher conferences are scheduled on October 7-8, 2026 and February 11-12, 2027.
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Recently Updated Calendars
Other Illinois school district calendars — recently added or updated.