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O'Fallon School District OF90 IL Calendar 26-27

  • 2026/27
  • Illinois
  • 4 teacher days

The O'Fallon School District OF90 2026–27 school year runs from Aug 12, 2026 to May 20, 2027. Breaks include winter break Dec 21 - Jan 1, spring break Mar 26 - Apr 2, and fall break Nov 25-27. The table below lists all teacher workdays and holidays. Download or print the calendar, or read the FAQs.

School year starts Wed, Aug 12, 2026 First Day of School
School year ends Thu, May 27, 2027 Last Day of Attendance (If All Emergency Days Are Used)
Next key date Wed, Aug 12, 2026 Counts down once the school year is under way

O'Fallon School District OF90 2026-27 calendar

The district's published calendar. Select an image to open it full size.

Official School Calendar for Academic Year 2026–2027

O'Fallon School District OF90 Calendar 26-27 [PDF]

O'Fallon School District OF90 school year calendar

Every published date for 2026–27, colour-coded by what happens that day.

  • First / last day
  • Break
  • Holiday
  • Teacher / staff day
  • Other date

August 2026

  • Aug 10, 2026 — Teacher Institute Day
  • Aug 11, 2026 — Teacher Institute Day
  • Aug 12, 2026 — First Day of School

September 2026

  • Sep 7, 2026 — No School - Labor Day
  • Sep 11, 2026 — 1st Quarter Jr. High Progress Reports Posted / D-F Notices Mailed

October 2026

  • Oct 7-8, 2026 — Parent-Teacher Conferences
  • Oct 8, 2026 — End of 1st Quarter
  • Oct 9, 2026 — Teacher Institute Day (No student attendance)
  • Oct 13, 2026 — No School - Columbus Day
  • Oct 14, 2026 — No School

November 2026

  • Nov 11, 2026 — No School - Veterans Day
  • Nov 13, 2026 — 2nd Quarter Jr. High Progress Reports Posted / D-F Notices Mailed
  • Nov 25-27, 2026 — No School - Fall Break

December 2026

  • Dec 19, 2026 — End of 2nd Quarter
  • Dec 21, 2026 - Jan 1, 2027 — No School - Winter Break

January 2027

  • Dec 21, 2026 - Jan 1, 2027 — No School - Winter Break
  • Jan 4, 2027 — Teacher Institute Day (No student attendance)
  • Jan 5, 2027 — School Resumes
  • Jan 13, 2027 — 2nd Quarter Report Cards available in Skyward
  • Jan 18, 2027 — No School - MLK Day

February 2027

  • Feb 11, 2027 — Parent-Teacher Conferences
  • Feb 12, 2027 — No student attendance - Parent-Teacher Conferences
  • Feb 15, 2027 — No School - Presidents' Day

March 2027

  • Mar 5, 2027 — End of 3rd Quarter
  • Mar 12, 2027 — 3rd Quarter Report Cards available in Skyward
  • Mar 25, 2027 — 4th Quarter Jr. High Progress Reports Posted / D-F Notices Mailed
  • Mar 26 - Apr 2, 2027 — No School - Spring Break

April 2027

  • Mar 26 - Apr 2, 2027 — No School - Spring Break

May 2027

  • May 20, 2027 — Last Day of Attendance of 4th Quarter
  • May 27, 2027 — Last Day of Attendance (If All Emergency Days Are Used)
  • May 31, 2027 — Memorial Day

June 2027

July 2027

O'Fallon School District OF90 teacher and staff days 2026/27

Students normally stay home on these days. Confirm with the district before making plans.

  • Aug 10, 2026 Teacher Institute Day District source
  • Aug 11, 2026 Teacher Institute Day District source
  • Oct 9, 2026 Teacher Institute Day (No student attendance) District source
  • Jan 4, 2027 Teacher Institute Day (No student attendance) District source

O'Fallon School District OF90 breaks and holidays

School is closed to students on these dates.

  • Sep 7, 2026 No School - Labor Day Holiday
  • Oct 13, 2026 No School - Columbus Day Holiday
  • Oct 14, 2026 No School Holiday
  • Nov 11, 2026 No School - Veterans Day Holiday
  • Nov 25-27, 2026 No School - Fall Break Break
  • Dec 21, 2026 - Jan 1, 2027 No School - Winter Break Break
  • Jan 18, 2027 No School - MLK Day Holiday
  • Feb 15, 2027 No School - Presidents' Day Holiday
  • Mar 26 - Apr 2, 2027 No School - Spring Break Break
  • May 31, 2027 Memorial Day Holiday

Your checked 2026/27 O'Fallon School District OF90 planning calendar

How these dates are put together, and what to double-check before you book anything.

Useful now31 published dates for the 2026–27 school year, laid out month by month.
CheckedTaken from the district’s own published calendar, not retyped from memory.
Kept currentLast updated April 30, 2026.
Full term dates table

O'Fallon School District OF90 2026–27 calendar dates

DateEvent
Aug 10, 2026Teacher Institute Day
Aug 11, 2026Teacher Institute Day
Aug 12, 2026First Day of School
Sep 7, 2026No School - Labor Day
Sep 11, 20261st Quarter Jr. High Progress Reports Posted / D-F Notices Mailed
Oct 7-8, 2026Parent-Teacher Conferences
Oct 8, 2026End of 1st Quarter
Oct 9, 2026Teacher Institute Day (No student attendance)
Oct 13, 2026No School - Columbus Day
Oct 14, 2026No School
Oct 16, 20261st Quarter Report Cards available in Skyward
Nov 11, 2026No School - Veterans Day
Nov 13, 20262nd Quarter Jr. High Progress Reports Posted / D-F Notices Mailed
Nov 25-27, 2026No School - Fall Break
Dec 19, 2026End of 2nd Quarter
Dec 21, 2026 - Jan 1, 2027No School - Winter Break
Jan 4, 2027Teacher Institute Day (No student attendance)
Jan 5, 2027School Resumes
Jan 13, 20272nd Quarter Report Cards available in Skyward
Jan 18, 2027No School - MLK Day
Jan 29, 20273rd Quarter Jr. High Progress Reports Posted / D-F Notices Mailed
Feb 11, 2027Parent-Teacher Conferences
Feb 12, 2027No student attendance - Parent-Teacher Conferences
Feb 15, 2027No School - Presidents' Day
Mar 5, 2027End of 3rd Quarter
Mar 12, 20273rd Quarter Report Cards available in Skyward
Mar 25, 20274th Quarter Jr. High Progress Reports Posted / D-F Notices Mailed
Mar 26 - Apr 2, 2027No School - Spring Break
May 20, 2027Last Day of Attendance of 4th Quarter
May 27, 2027Last Day of Attendance (If All Emergency Days Are Used)
May 31, 2027Memorial Day

O'Fallon School District 90 Calendar 2026-2027 FAQs

When is the first day of school in O'Fallon School District 90 2026-2027?
The first day of school is August 12, 2026.
When is spring break in O'Fallon School District 90 2026-2027?
Spring break is from March 26, 2027 to April 2, 2027.
When is Christmas break in O'Fallon School District 90 2026-2027?
Christmas break falls within the winter break from December 21, 2026 to January 1, 2027.
When is winter break in O'Fallon School District 90 2026-2027?
Winter break is from December 21, 2026 through January 1, 2027.
When is Thanksgiving break in O'Fallon School District 90 2026-2027?
Thanksgiving (Fall Break) is from November 25 through November 27, 2026.
When is the last day of school in O'Fallon School District 90 2026-2027?
The last day of school is May 20, 2027. If emergency days are used, it may extend to May 27, 2027.
When does school resume after winter break in O'Fallon School District 90 2026-2027?
School resumes on January 5, 2027.
When is Labor Day holiday in O'Fallon School District 90 2026-2027?
Labor Day is observed on September 7, 2026, and there is no school.
When is Memorial Day in O'Fallon School District 90 2026-2027?
Memorial Day is on May 31, 2027.
When are parent-teacher conferences in O'Fallon School District 90 2026-2027?
Parent-teacher conferences are scheduled on October 7-8, 2026 and February 11-12, 2027.

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O'Fallon School District OF90 calendar FAQs

When is the first day of school in O'Fallon School District 90 2026-2027?
The first day of school is August 12, 2026.
When is spring break in O'Fallon School District 90 2026-2027?
Spring break is from March 26, 2027 to April 2, 2027.
When is Christmas break in O'Fallon School District 90 2026-2027?
Christmas break falls within the winter break from December 21, 2026 to January 1, 2027.
When is winter break in O'Fallon School District 90 2026-2027?
Winter break is from December 21, 2026 through January 1, 2027.
When is Thanksgiving break in O'Fallon School District 90 2026-2027?
Thanksgiving (Fall Break) is from November 25 through November 27, 2026.
When is the last day of school in O'Fallon School District 90 2026-2027?
The last day of school is May 20, 2027. If emergency days are used, it may extend to May 27, 2027.
When does school resume after winter break in O'Fallon School District 90 2026-2027?
School resumes on January 5, 2027.
When is Labor Day holiday in O'Fallon School District 90 2026-2027?
Labor Day is observed on September 7, 2026, and there is no school.
When is Memorial Day in O'Fallon School District 90 2026-2027?
Memorial Day is on May 31, 2027.
When are parent-teacher conferences in O'Fallon School District 90 2026-2027?
Parent-teacher conferences are scheduled on October 7-8, 2026 and February 11-12, 2027.

Dates can change after publication. Read our calendar disclaimer.