For the 2026–2027 school year, the district serves 10,000 students across 15 schools in Delaware. Classes begin August 31, 2026 and end June 11, 2027, with 180 instructional days planned. All dates listed below are sourced from the district's official publications. Verify with Colonial School District before scheduling around them.
Visual Calendar
Official Calendar Images
Official calendar scans for Colonial School District. Click any page to open the full-size image.
School Calendar
Interactive Calendar
Colonial School District's 2026–2027 academic calendar — holidays, breaks, and key dates.
Month by Month Calendar
About the District
School Information
Details and contact information for Colonial School District CSD.
Sources and Checks
Where these dates come from
How the 2026–2027 Colonial School District calendar on this page was compiled and what to re-check before you rely on it.
- ✓District publication. Dates are taken from the calendar Colonial School District published for 2026–2027, shown as images on this page.
- ✓Official website. Cross-checked against colonialschooldistrict.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 Colonial School District before booking around a date.
Common Questions
Frequently Asked Questions
Colonial School District Calendar 2026–2027 — important dates and answers.
The first day of school in Colonial School District for the 2026-2027 school year is August 31, 2026.
Spring break in Colonial School District is from March 29 to April 2, 2027.
Christmas break in Colonial School District runs from December 24 to December 31, 2026.
Winter break in Colonial School District is scheduled from December 24 to December 31, 2026.
Thanksgiving break in Colonial School District is from November 26 to November 27, 2026.
The last day of school in Colonial School District for the 2026-2027 school year is June 11, 2027.
Yes, Colonial School District has several professional development and data days with no students, including August 24-28, 2026, October 9, 2026, February 12, 2027, and May 28, 2027.
Yes, PreK-12 conference days (no students) are scheduled for March 4-5, 2027.
Schools are closed but offices remain open on dates such as September 4, 2026, December 21-23, 2026, March 29-31, 2027, and April 1-2, 2027.
Schools and offices are fully closed on major holidays including July 2, 2026, September 7, 2026, November 3, 2026, November 11, 2026, January 1, 2027, January 18, 2027, February 15, 2027, March 26, 2027, May 31, 2027, and June 18, 2027.
Explore More
Recently Updated Calendars
Other Delaware school district calendars — recently added or updated.