Important dates, closures and the official SEA academic calendar — all in one place, easy to find.
The sheet below is exactly what the school office publishes, and it is always the source of truth. The table beside it is the same information typed out.
During the regular school year, Monday to Friday, 8:45 AM to 2:05 PM. During the Extended School Year (ESY): Monday, Tuesday, Thursday and Friday 8:45 AM to 2:05 PM, and Wednesday 8:45 AM to 12:00 PM.
The Extended School Year is our summer session. In 2026–27 it runs from June 21 to August 6, 2027, with the Fourth of July observed on July 5.
The calendar runs from the first day of school in mid-August to early June, with quarters ending in October, January, March and June.
The key below the calendar explains them — closures, regular attendance days, staff institute days with no students, ESY days, and quarter ends. SEA events are listed on the back of the printed sheet.
The calendar image is always the source of truth. If the at-a-glance table ever disagrees with it, go by the sheet and let the front office know.
Call 630·323·2900 or email us with any questions about closures, early dismissals, or the summer session.