For the 2026–2027 school year, Williamsville-Sherman Community Unit School District #15 publishes its official academic calendar for Illinois. Classes begin Aug 18 and end May 24. All dates listed below are sourced from the district's official publications. Verify with Williamsville-Sherman Community Unit School District #15 before scheduling around them.
Visual Calendar
Official Calendar Images
Official calendar scans for Williamsville-Sherman Community Unit School District #15. Click any page to open the full-size image.
School Calendar
Interactive Calendar
Williamsville-Sherman Community Unit School District #15's 2026–2027 academic calendar — holidays, breaks, and key dates.
Month by Month Calendar
- No School – Teachers’ InstituteAug 17, 2026No School
- First Day of School – Early Dismissal – Teachers’ InstituteAug 18, 2026School Opens
- Early Dismissal – Teachers’ InstituteAug 19, 2026Teacher Day
- No School – Labor DaySep 7, 2026No School
- Regular Dismissal – Parent-Teacher ConferencesOct 7, 2026Teacher Day
- Regular Dismissal – Parent-Teacher ConferencesOct 8, 2026Teacher Day
- No School – Teachers’ InstituteOct 9, 2026No School
- No School – Columbus DayOct 12, 2026No School
- Early Dismissal – Parent-Teacher ConferencesNov 17, 2026Teacher Day
- Early Dismissal – Parent-Teacher ConferencesNov 18, 2026Teacher Day
- Early Dismissal – Thanksgiving BreakNov 24, 2026No School
- No School – Thanksgiving BreakNov 25 — Nov 27No School
- Early Dismissal – Winter BreakDec 18, 2026No School
- No School – Winter BreakDec 21 — Jan 1No School
- No School – Teachers’ InstituteJan 4, 2027No School
- School ResumesJan 5, 2027Event
- No School – Martin Luther King’s BirthdayJan 18, 2027No School
- Early Dismissal – School ImprovementFeb 12, 2027Event
- No School – Presidents’ DayFeb 15, 2027No School
- Early Dismissal – Spring BreakMar 19, 2027No School
- No School – Spring BreakMar 22 — Mar 29No School
- Early Dismissal – School ImprovementApr 16, 2027Event
- Early Dismissal – School ImprovementMay 7, 2027Event
- Last Day of School – Early Dismissal – School ImprovementMay 24, 2027School Closes
- No School – Teachers’ InstituteMay 25, 2027No School
- Required Emergency Make-Up DaysMay 26 — May 28Event
- No School – Memorial DayMay 31, 2027No School
- Required Emergency Make-Up DaysJun 1 — Jun 2Event
About the District
School Information
Details and contact information for Williamsville-Sherman Community Unit School District #15.
Sources and Checks
Where these dates come from
How the 2026–2027 Williamsville-Sherman Community 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 Williamsville-Sherman Community Unit School District #15 published for 2026–2027, shown as images on this page.
- ✓Official website. Cross-checked against educounty.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 Williamsville-Sherman Community Unit School District #15 before booking around a date.
Common Questions
Frequently Asked Questions
Williamsville-Sherman Community Unit School District #15 Calendar 2026–2027 — important dates and answers.
The first day of school is August 18, 2026. It is also an early dismissal and Teachers’ Institute day.
Spring Break begins with an early dismissal on March 19, 2027. There is no school from March 22 through March 29, 2027.
Christmas Break is part of Winter Break. Students have an early dismissal on December 18, 2026, followed by no school from December 21, 2026 through January 1, 2027.
Winter Break begins after an early dismissal on December 18, 2026. There is no school from December 21, 2026 through January 1, 2027. School resumes on January 5, 2027, after a Teachers’ Institute day on January 4.
Students have an early dismissal on November 24, 2026 for Thanksgiving Break. There is no school from November 25 through November 27, 2026.
The last day of school is May 24, 2027. It is an early dismissal and School Improvement day.
There is no school on September 7, 2026 for Labor Day.
Parent-Teacher Conferences are scheduled for October 7 and October 8, 2026. Both days have regular dismissal.
Parent-Teacher Conferences are scheduled for November 17 and November 18, 2026. Both days are early dismissal days.
There is no school on January 18, 2027 for Martin Luther King’s Birthday.
There is no school on February 15, 2027 for Presidents’ Day.
School Improvement early dismissal days are February 12, April 16, May 7, and May 24, 2027.
There is no school on May 31, 2027 for Memorial Day.
The required emergency make-up days are May 26, May 27, May 28, June 1, and June 2, 2027.
Explore More
Recently Updated Calendars
Other Illinois school district calendars — recently added or updated.