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School Open
Dismissal: 3:30 PM
Next 7 Days
October 2026
Coming Up
1 this weekSchool Breaks
Holidays (No School)
The O'Fallon Community Consolidated School District 90 school calendar for the 2026-27 school year runs from Wednesday, August 12, 2026 to Thursday, May 20, 2027 in Illinois.
- •3 scheduled breaks and 10 holidays throughout the year
- •Spring break: Mar 26 – Apr 2
- •Winter break: Dec 21 – Jan 1
O'Fallon Community Consolidated School District 90 starts school 188 days later than most Illinois districts. Winter break starts 364 days later than the most common Illinois schedule.
Download the iCal file above to sync all O'Fallon Community Consolidated School District 90 dates with your phone or computer.
Frequently Asked Questions
Is O'Fallon Community Consolidated School District 90 school open today?
Yes, O'Fallon Community Consolidated School District 90 is open today. Check the weekly calendar above for upcoming school days and closures.
When is the next day off for O'Fallon Community Consolidated School District 90?
The next day off is Friday, October 9, 2026 for Teacher Institute Day.
When is the first day of school for O'Fallon Community Consolidated School District 90?
The first day of school for O'Fallon Community Consolidated School District 90 in 2026-27 is Wednesday, August 12, 2026.
When is the last day of school for O'Fallon Community Consolidated School District 90?
The last day of school for O'Fallon Community Consolidated School District 90 in 2026-27 is Thursday, May 20, 2027.
When is spring break for O'Fallon Community Consolidated School District 90?
Spring break for O'Fallon Community Consolidated School District 90 is Friday, March 26, 2027 to Friday, April 2, 2027.
When is winter break for O'Fallon Community Consolidated School District 90?
Winter break for O'Fallon Community Consolidated School District 90 is Monday, December 21, 2026 to Friday, January 1, 2027.
When do students go back to school after winter break?
Students in O'Fallon Community Consolidated School District 90 return to school after winter break on Monday, January 4, 2027. Winter break ends on Friday, January 1, 2027.
When is Thanksgiving break for O'Fallon Community Consolidated School District 90?
Thanksgiving break for O'Fallon Community Consolidated School District 90 is Wednesday, November 25, 2026 to Friday, November 27, 2026.
How do I add O'Fallon Community Consolidated School District 90 calendar to my phone?
Click the "Add to Calendar" button at the top of this page to download the iCal (.ics) file. Then:
iPhone/iPad: Tap the downloaded file, then tap "Add All" to add events to your Calendar app.
Android: Open the file with Google Calendar, review the events, and tap "Import".
Google Calendar (web): Go to Settings → Import & Export → Select the .ics file → Import.
Outlook: Double-click the file or drag it into your Outlook calendar.
Apple Calendar (Mac): Double-click the file or go to File → Import → select the .ics file.
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Last updated: September 16, 2026
Source: O'Fallon Community Consolidated School District 90 Official Calendar