Center Cass SD 66 School Calendar 2025-2026
Center Cass SD 66 is a public school district in Illinois serving 1,130 students. This page covers the 2025-2026 school year with day-level calendar data.
This district is part of the Chicago-Naperville-Elgin, IL-IN metropolitan area.
1,130
Enrollment
168
School Days
38
Break Days
2025-2026
School Year
Calendar Summary
First Day of School
August 11, 2025
Last Day of School
May 22, 2026
NCES District ID
1708970
State
Illinois
Breaks & Holidays
Scheduled breaks and holidays for Center Cass SD 66 during 2025-2026 (excludes weekends and summer):
| Break | Start | End | Days |
|---|---|---|---|
| Institute Day | Aug 18 | Aug 19 | 2 |
| Labor Day | Sep 1 | Sep 1 | 1 |
| Staff Development Day | Sep 15 | Sep 15 | 1 |
| End Of First Grading Period | Oct 10 | Oct 10 | 1 |
| Columbus Day | Oct 13 | Oct 13 | 1 |
| Staff Development Day | Oct 17 | Oct 17 | 1 |
| Elementary School Parent-Teacher Conferences | Oct 20 | Oct 20 | 1 |
| Nevada Day | Oct 31 | Oct 31 | 1 |
| Veterans Day | Nov 11 | Nov 11 | 1 |
| Thanksgiving Break | Nov 24 | Nov 26 | 3 |
| Thanksgiving Day | Nov 27 | Nov 27 | 1 |
| Thanksgiving Break | Nov 28 | Nov 28 | 1 |
| Winter Break | Dec 19 | Dec 24 | 4 |
| Christmas Day | Dec 25 | Dec 25 | 1 |
| Winter Break | Dec 26 | Dec 31 | 4 |
| New Year's Day | Jan 1 | Jan 1 | 1 |
| Winter Break | Jan 2 | Jan 2 | 1 |
| Martin Luther King Jr. Day | Jan 19 | Jan 19 | 1 |
| Staff Development Day | Jan 26 | Jan 26 | 1 |
| Presidents' Day | Feb 16 | Feb 16 | 1 |
| Spring Break | Mar 13 | Mar 13 | 1 |
| Spring Break | Mar 27 | Apr 3 | 6 |
| Staff Development Day | Apr 6 | Apr 6 | 1 |
| Memorial Day | May 25 | May 25 | 1 |
School Year Calendar
Visual calendar for Center Cass SD 66, July 2025 through June 2026:
Jul 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
Aug 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||
| 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Sep 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 |
Oct 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 | 31 |
Nov 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | |||||
| 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 24 | 25 | 26 | 27 | 28 | 29 | 30 |
Dec 2025
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 | 31 |
Jan 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |||
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 | 31 |
Feb 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | ||||||
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 | 25 | 26 | 27 | 28 |
Mar 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | ||||||
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 | 25 | 26 | 27 | 28 | 29 |
| 30 | 31 |
Apr 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 |
May 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||
| 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Jun 2026
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 |
In SessionBreak/HolidayWeekend
Multi-Year Comparison
Calendar data across school years for Center Cass SD 66:
| School Year | First Day | Last Day | School Days | Break Days |
|---|---|---|---|---|
| 2025-2026 | Aug 11 | May 22 | 168 | 38 |
| 2026-2027 | Aug 18 | Jun 3 | 194 | 18 |
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