Community High School District 155 Calendar 2026-2027
Complete holiday schedule and key dates for Community High School District 155 for the 2026-2027 academic year. Official district website
School Year Timeline
Key Dates
| Event | Date(s) | Status |
|---|---|---|
| First Day of School | August 12, 2026 (Wed) | School Opens |
| Labor Day | September 7, 2026 (Mon) | No School |
| Columbus Day | October 12, 2026 (Mon) | No School |
| Election Day | November 3, 2026 (Tue) | No School |
| Thanksgiving Holiday | November 25, 2026 - November 27, 2026 | No School |
| Winter Break | December 21, 2026 - January 1, 2027 | No School |
| Martin Luther King Day | January 18, 2027 (Mon) | No School |
| President’s Day | February 15, 2027 (Mon) | No School |
| Spring Break | March 29, 2027 - April 2, 2027 | No School |
| Last Day of School | May 20, 2027 (Thu) | School Closes |
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Extended Time Off
| Window | Date(s) | Length |
|---|---|---|
| Thanksgiving Holiday Window | Nov 25–29, 2026Districtwide no-school: Nov 25–27, 2026 · Adjacent weekend: Nov 28–29, 2026 | 5 days |
| Winter Break Window | Dec 19, 2026–Jan 5, 2027Districtwide no-school: Dec 21, 2026–Jan 1, 2027; Jan 4–5, 2027 · Adjacent weekend: Dec 19–20, 2026; Jan 2–3, 2027 | 18 days |
| Spring Break Window | Mar 26–Apr 4, 2027Districtwide no-school: Mar 26, 2027; Mar 29–Apr 2, 2027 · Adjacent weekend: Mar 27–28, 2027; Apr 3–4, 2027 | 10 days |
Other Important Dates
| Event | Date(s) |
|---|---|
| End of First Semester | December 18, 2026 (Fri) |
| First Day of School in 2027 - Start of Second Semester | January 6, 2027 (Wed) |
| Start of Second Semester | January 6, 2027 (Wed) |
District 155 Calendar 2026-2027 www.illinoisschoolcalendar.com
View the full 2026-2027 school year by month.
Monthly calendar12 months
About Community High School District 155
Community High School District 155 begins above four independent elementary systems: Crystal Lake 47, Cary 26, Fox River Grove 3, and Prairie Grove 46. Its own boundary assigns Cary-Grove, Crystal Lake Central, Crystal Lake South, or Prairie Ridge. Elementary-district and municipal lines overlap the four high-school areas, so the earlier system does not determine the ninth-grade campus.
Each comprehensive school serves a geographic section under the District 155 map. Ninth grade brings together students from different middle schools and transfers governance, registration, transportation, and calendar responsibility to the high-school district.
Haber Oaks Campus provides an alternative setting with restorative, trauma-sensitive, and special-education supports through district referral. It operates alongside the four residence-assigned high schools. The ordinary route ends at Cary-Grove, Central, South, or Prairie Ridge; Haber Oaks changes the educational setting for an individual student without adding another geographic zone.
Compared With Related Districts
Selected highlights from this district calendar and related district calendar pages.
District 155 uses this Spring Break week, while District 15 (March 22, 2027 - March 26, 2027) and District 11 (March 26, 2027 - March 30, 2027) use different windows in the related calendar set.
District 155 ends on this date; District 15 (May 28, 2027) and District 158 (May 27, 2027) close on different dates in the related calendar set.
Compare key dates with nearby districts
Choose one or two related districts to line up major planning dates with District 155.
Related Links
About This Calendar
Data Source: Community High School District 155 2026-2027 School Calendar How we verify dates
Disclaimer: This website is not affiliated with Community High School District 155, any state education authority, or any official district body. While we strive for accuracy, always verify important dates with the official district website.