Colonial School District School Calendar 2026-2027

At a Glance

CSD is a suburban school district with 15 schools. For the 2026-2027 school year, classes begin September 1 and end June 11. The district has said a complete 2026-2027 calendar — including teacher workdays — will be published soon. This calendar includes 9 professional development days — useful to know when planning childcare.

Source: Colonial School District

Also known as CSD.

Schools in Colonial School District

Southern Elementary School (Elementary)
Leach (John G.) School (Other)
Wilmington Manor Elementary School (Elementary)
Pleasantville Elementary School (Elementary)
Eisenberg (Harry O.) Elementary School (Elementary)
The Colwyck Center (Prekindergarten)
Castle Hills Elementary School (Elementary)
Downie (Carrie) Elementary School (Elementary)
Read (George) Middle School (Middle)
Bedford (Gunning) Middle School (Middle)
Penn (William) High School (High)
Wilbur (Kathleen H.) Elementary (Elementary)
McCullough (Calvin R. ) Middle School (Middle)
New Castle Elementary School (Elementary)
The Wallace Wallin School (Ungraded)

Colonial School District 2026-2027 School Calendar

All schools

2026-08-24 to 2026-08-28 — Professional Development (closed)
2026-09-01 — First Pupil Day (in session)
2026-09-04 — No School (closed)
2026-09-07 — Holiday (closed)
2026-09-15 — Professional Development / No School (closed)
2026-10-09 — No School / Professional Development (closed)
2026-11-03 — No School (closed)
2026-11-06 — Professional Development (closed)
2026-11-11 — Holiday (closed)
2026-11-23 — No School / Parent-Teacher Conference (closed)
2026-11-24 — No School / Parent-Teacher Conference (closed)
2026-11-25 — Professional Development / No School (closed)
2026-11-26 to 2026-11-27 — Thanksgiving Break (closed)
2026-12-11 — Professional Development / No School (closed)
2026-12-23 to 2027-01-01 — Christmas Break (closed)
2027-01-18 — Holiday (closed)
2027-01-29 — No School (closed)
2027-02-12 — Professional Development / No School (closed)
2027-02-15 — Holiday (closed)
2027-03-05 — No School / Parent-Teacher Conference (closed)
2027-03-29 to 2027-04-02 — Spring Break (closed)
2027-05-28 — Professional Development / No School (closed)
2027-05-31 — Holiday (closed)
2027-06-11 — Last Pupil Day (in session)
2027-06-14 to 2027-06-16 — Professional Development (closed)
2027-06-18 — Holiday (closed)