Allentown City SD School Calendar 2026-2027

At a Glance

ACSD is an urban school district with 21 schools. For the 2026-2027 school year, classes begin August 24 and end June 10. The calendar sets aside 4 additional days (February 12–June 14) that may be used as weather makeup days if needed. This calendar includes 1 professional development day, 4 early-release or half days — useful to know when planning childcare. Standardized testing windows: PSAT/NMSQT Testing Window (October 1–October 31); Keystone Winter Wave 1 Testing (December 7–December 18); Keystone Winter Wave 2 Testing (January 4–January 15); PSSA ELA Testing Window (April 26–April 30); PSSA Math & Science Testing Window (May 3–May 7); PSSA Make-up Testing Window (May 10–May 14); Keystone Spring Testing Window (May 17–May 28).

Source: Allentown City SD

Also known as ACSD.

Schools in Allentown City SD

Hiram W Dodd El Sch (Elementary)
Jefferson El Sch (Elementary)
Lehigh Parkway El Sch (Elementary)
Mosser El Sch (Elementary)
Muhlenberg El Sch (Elementary)
Ritter El Sch (Elementary)
Roosevelt El Sch (Elementary)
Union Terrace El Sch (Elementary)
Washington El Sch (Elementary)
Central El Sch (Elementary)
Harrison-Morton MS (Middle)
Francis D Raub MS (Middle)
South Mountain MS (Middle)
William Allen HS (High)
Louis E Dieruff HS (High)
Trexler MS (Middle)
Sheridan El Sch (Elementary)
Luis A. Ramos El Sch (Elementary)
Building 21 Allentown (High)
Jackson Early Childhood Center (Elementary)
Brigadier General Anna Mae Hays El Sch (Elementary)

Allentown City SD 2026-2027 School Calendar

All schools

2026-08-13 to 2026-08-14 — New Teacher Induction (closed)
2026-08-17 to 2026-08-20 — Staff Development (ASD) (closed)
2026-08-20 — Grades K, 6, 9 AM Orientation (in session)
2026-08-24 — First Day of School - All Students Report (in session)
2026-08-24 — First Rating Period Begins (in session)
2026-09-04 — Schools Closed - Labor Day Holiday (closed)
2026-09-07 — Schools Closed - Labor Day Holiday (closed)
2026-10-12 — Schools Closed - Columbus Day (closed)
2026-10-01 to 2026-10-31 — PSAT/NMSQT Day (in session)
2026-10-28 — First Rating Period Ends (in session)
2026-10-29 — Second Rating Period Begins (in session)
2026-11-03 — Staff Development (Act 80) (closed)
2026-11-23 to 2026-11-24 — Pre K—12 Conferences (1/2 Day) (partial)
2026-11-25 — Pre K—12 Conferences (No school for students) (closed)
2026-11-26 to 2026-11-30 — Schools Closed - Thanksgiving Holiday (closed)
2026-12-21 to 2026-12-31 — Schools Closed - Winter Holiday (closed)
2026-12-07 to 2026-12-18 — Keystone Winter Wave 1 (in session)
2027-01-01 to 2027-01-03 — Schools Closed - New Year's Holiday (closed)
2027-01-18 — Schools Closed - Dr. Martin Luther King Jr's Birthday (closed)
2027-01-21 — Second Rating Period Ends (in session)
2027-01-22 — Third Rating Period Begins (in session)
2027-01-25 — Staff Development (Act 80) (closed)
2027-01-04 to 2027-01-15 — Keystone Winter Wave 2 (in session)
2027-02-12 — Schools Closed - Presidents' Day Holiday (closed)
2027-02-15 — Schools Closed - Presidents' Day Holiday (closed)
2027-03-15 — Staff Development (Act 80) (closed)
2027-03-23 to 2027-03-24 — Pre K—12 Conferences (1/2 Day) (partial)
2027-03-25 to 2027-03-30 — Schools Closed - Spring Holiday (closed)
2027-04-06 — Third Rating Period Ends (in session)
2027-04-07 — Fourth Rating Period Begins (in session)
2027-04-26 to 2027-04-30 — PSSA Eng. Language Arts Testing Gr. 3-8 (in session)
2027-05-18 — Staff Development (Act 80) (closed)
2027-05-03 to 2027-05-07 — PSSA Math & Science Testing Gr. 3-8 (in session)
2027-05-10 to 2027-05-14 — PSSA Make-ups (in session)
2027-05-17 to 2027-05-28 — Keystone Spring Testing, HS modified start for non-test takers (in session)
2027-05-31 — Schools Closed - Memorial Day Holiday (closed)
Date to be confirmed — Allen High School Commencement
Date to be confirmed — Dieruff High School Commencement
Date to be confirmed — Bridgeview Academy Commencement
2027-06-09 — Early Dismissal (partial)
2027-06-10 — Last Day for Students, Early Dismissal, Fourth Rating Period Ends (partial)
2027-06-10 — Fourth Rating Period Ends (in session)
2027-06-11 — Last Day for Professionals, Staff Development (ASD) (closed)
2027-06-14 to 2027-06-16 — Emergency School Closing Make-up Days for Professionals (closed)
2027-06-18 — District Closed - Juneteenth (closed)
2027-07-05 — District Closed - Independence Day Holiday (closed)
Date to be confirmed — SAT Day
2027-02-12 — If necessary, make-up days for students due to emergency school closings will occur on February 12, March 30 & March 25 (closed)
2027-03-25 — If necessary, make-up days for students due to emergency school closings will occur on February 12, March 30 & March 25 (closed)
2027-03-30 — If necessary, make-up days for students due to emergency school closings will occur on February 12, March 30 & March 25 (closed)