Colonial School District Calendar 2026–2027
New Castle, DE · 20 key dates
August 2026
Mon, Aug 31First Day of School (Kindergarten, Grades 6 & 9)
September 2026
Tue, Sep 1All K-12 Students Report
Fri, Sep 4Schools Closed (Offices Open)
Mon, Sep 7Labor Day (Schools & Offices Closed)
Tue, Sep 15No School (Professional Development)
October 2026
Fri, Oct 9No School (Professional Development)
November 2026
Tue, Nov 3Schools & Offices Closed
Fri, Nov 6No School (Professional Development & Data Day)
Wed, Nov 11Veterans Day (Schools & Offices Closed)
Nov 23 – Nov 27Thanksgiving Break (Conferences Nov 23-24)
December 2026
Dec 21 – Jan 1Winter Break
January 2027
Mon, Jan 18Martin Luther King Jr. Day
Fri, Jan 29No School (Data Day)
February 2027
Fri, Feb 12No School (Professional Development)
Mon, Feb 15Presidents Day
March 2027
Mar 4 – Mar 5No School (PreK-12 Conferences)
Thu, Mar 25No School (Data Day)
Mar 26 – Apr 2Spring Break
June 2027
Thu, Jun 10Last Day of School (PreK)
Fri, Jun 11Last Day of School (Grades K-11, Abbreviated Day)
Compiled from the district's published calendar and subject to change — always verify against the official Colonial SD calendar.