SchoolDates
Read from the district on October 8, 2026

Centennial school calendar, 2026–2027

Key dates for 2026–2027: Thanksgiving break and one more day off November 25–28; winter break December 24 to January 3; spring break March 25–29; last day of school June 10.

Next time off Nov 3 Teacher work day, no students · November 3 As of October 8, 2026, the day this calendar was read
School days off this year 37 across 13 separate closures
Last day of school June 10 Thursday
Thanksgiving break + 1 more day off November 25–28; Winter break December 24 to January 3; Spring break March 25–29; Last day of school June 10;
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Month by month

Days off: school breaks, holidays and staff days. Not days off: early releases and term milestones.

August 2026

SMTWTFS
26
27
28
29
30
31
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
1
2
3
4
5
  • 10Staff day
  • 11Staff day
  • 12Staff day
  • 13Staff day
  • 14–17Staff day
  • 18WEB Orientation Training
  • 19WEB Orientation Training
  • 20Log College - Open House Self Guided Tour
  • 21–24Staff day
  • 25Staff day
  • 26Staff day
  • 27Staff day
  • 28No school

September 2026

SMTWTFS
30
31
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
1
2
3
  • 3No school
  • 4No school
  • 7Labor Day
  • 21No school

October 2026

SMTWTFS
27
28
29
30
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
  • 3Testing
  • 13Testing
  • 16Early release

November 2026

SMTWTFS
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
1
2
3
4
5
  • 2End of grading period
  • 3Staff day
  • 20Staff day
  • 23–24Holiday Shop set up
  • 25Conferences, no school
  • 26–28Thanksgiving break
  • 30 onHoliday Shop Classroom Visits

December 2026

SMTWTFS
29
30
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
1
2
  • to 4Holiday Shop Classroom Visits
  • 5Testing
  • 7Holiday Shop Clean Up
  • 14–20Holiday Shop
  • 23Early release
  • 24 onWinter break

January 2027

SMTWTFS
27
28
29
30
31
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
1
2
3
4
5
6
  • to 3Winter break
  • 18MLK Day
  • 22Staff day

February 2027

SMTWTFS
31
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
1
2
3
4
5
6
  • 12Early release
  • 15Presidents Day

March 2027

SMTWTFS
28
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
1
2
3
  • 5End of trimester
  • 12Early release
  • 18Davis Open House
  • 25–29Spring break

April 2027

SMTWTFS
28
29
30
31
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
1
  • 2Early release
  • 26Grade 5 Parent Orientation
  • 28KL-5th Grade Parent Orientation

May 2027

SMTWTFS
25
26
27
28
29
30
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
1
2
3
4
5
  • 17Testing
  • 18No school
  • 19Testing
  • 20Testing
  • 22–24Testing
  • 25Testing
  • 26Testing
  • 27Early release
  • 28Staff day
  • 31Memorial Day

June 2027

SMTWTFS
30
31
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
1
2
3
  • 5Testing
  • 7Graduation
  • 9Graduation
  • 10Last day
  • 11Staff day
School break Holiday, no school Staff day, no students Early release Term milestone

Key dates

Key dates · 2026–2027
WhatDatesSchool daysBack to schoolSame dates in Pennsylvania
Thanksgiving break + 1 more day offNovember 25–283Monday, November 301 of 73 · Pennsylvania Thanksgiving break 2026, by district
Winter breakDecember 24 to January 37Monday, January 43 of 71 · Pennsylvania winter break 2026–27, by district
Spring breakMarch 25–293Tuesday, March 3012 of 63 · Pennsylvania spring break 2027, by district
Last day of schoolJune 10——6 of 64 · Pennsylvania last day of school 2027, by district
Longest closure
Teacher work day, no students, August 10–25 (12 school days)
One-day closures
6
Closures starting Tuesday to Thursday
6
Staff days, no students
16: Aug 10, Aug 11, Aug 12, Aug 13, Aug 14, Aug 18 and 10 more
Early-release days
7: Oct 16, Nov 24, Dec 23, Feb 12, Mar 12, Apr 2 and 1 more
Most days off in one month
August, 14 school days
Longest run of school days
35, March 30 to May 17

Most school days off of the 63 Pennsylvania districts we read with a complete calendar: 37.

Every date

Every published date · Centennial · 2026–2027
DateWhat it isTime offDistrict’s own wording
August 10Teacher work day, no students1 school dayWindow for Gr K-12 Inservice - Teacher Prep Day
August 11Teacher work day, no students1 school dayWindow for Gr K-12 Inservice - Teacher Prep Day
August 12Teacher work day, no students1 school dayWindow for Gr K-12 Inservice - Teacher Prep Day
August 13Teacher work day, no students1 school dayWindow for Gr K-12 Inservice - Teacher Prep Day
August 14–17Teacher work day, no students2 school daysWindow for Gr K-12 Inservice - Teacher Prep Day
August 18WEB Orientation Training—WEB Orientation Training
August 18Teacher work day, no students1 school dayWindow for Gr K-12 Inservice - Teacher Prep Day
August 19WEB Orientation Training—WEB Orientation Training
August 19Teacher work day, no students1 school dayWindow for Gr K-12 Inservice - Teacher Prep Day
August 20Log College - Open House Self Guided Tour—Log College - Open House Self Guided Tour
August 20WEB Orientation Training—WEB Orientation Training
August 20Teacher work day, no students1 school dayWindow for Gr K-12 Inservice - Teacher Prep Day
August 21–24Teacher work day, no students2 school daysWindow for Gr K-12 Inservice - Teacher Prep Day
August 25Teacher work day, no students1 school dayWindow for Gr K-12 Inservice - Teacher Prep Day
August 26Teacher work day, no studentsSome schools onlyGrs K-12 Inservice/Convocation/ Building Day Kindergarten Orienatation 4:30 PM - 6:30 PM
August 26KG Orientation—KG Orientation
August 26New/Returning Student Orientation/Building Tours—New/Returning Student Orientation/Building Tours
August 27Teacher work day, no students1 school dayGrs K-12 Inservice - Professional Learning
August 28No school1 school dayNO School / Offices Open
September 3No schoolSome schools onlyNo School for Kindergarten Students / Rostering Day
September 4No school1 school dayAll Schools Closed/Offices Open
September 7Labor Day1 school dayAll Schools & Offices Closed (Labor Day)
September 21No school1 school dayAll Schools & Offices Closed (Yom Kippur)
October 3Testing—SAT Testing
October 13Testing—PSAT TESTING
October 16Early release—Early Dismissal Grs K-12 Grs K-12 Inservice - Professional Learning
November 2End of grading period—End of the First Marking Period/Early Dismissal Grs. 6-12
November 3Teacher work day, no students1 school dayK-12 Inservices-Professional Learning (Election Day)
November 20Teacher work day, no studentsSome schools onlyElementary Schools Closed Grs K-5 Inservice Clerical Day Grs 6-12 Full Day of School
November 23–24Holiday Shop set up—Holiday Shop set up
November 24Early release—Early Dismissal Grs K-5 Grs K-5 Conferences Grs 6-12 Full Day of School
November 25Parent-teacher conferences, no school1 school dayAll Schools Closed Grs K-12 Conferences
November 26–28Thanksgiving break2 school daysAll Schools & Offices Closed (Thanksgiving)
November 30 to December 4Holiday Shop Classroom Visits—Holiday Shop Classroom Visits
December 2–4HSA Holiday Shop—HSA Holiday Shop
December 5Testing—SAT Testing
December 7Holiday Shop Clean Up—Holiday Shop Clean Up
December 14–20Holiday Shop—Holiday Shop
December 23Early release—Early Dismissal Grs K-12 K-12 Inservice-Professional Learning (Virtual Asynchronous)
December 24 to January 3Winter break7 school daysAll Schools & Offices Closed (Winter Break)
January 18Martin Luther King Jr. Day1 school dayAll Schools & Offices Closed (MLK Day)
January 18MLK Day of Service—MLK Day of Service
January 22Teacher work day, no students1 school dayGrs K-5 Full Day of School Secondary Scools Closed Grs 6-12 Inservice - Transition Day
February 12Early release—Early Dismissal Day Grs K-12 Grs K-12 Inservice - Professional Learning
February 15Presidents Day1 school dayAll School & Offices Closed (President's Day)
March 5End of trimester—End of Second Trimester/Early Dismissal Grs K-5 Grading Day Grs 6-12 Full Day of School
March 12Early release—Early Dismissal Grs K-12 Grs K-5 Conferences Grs 6 -12 Inservice Professional Learning
March 18Davis Open House—Davis Open House
March 25–29Spring break3 school daysAll Schools & Offices Closed (Spring Break)
April 2Early release—Early Dismissal Grs K-12 Grs K-5 Professional Learning Grs 6-12 Grading Day
April 26Grade 5 Parent Orientation—Grade 5 Parent Orientation
April 28KL-5th Grade Parent Orientation—KL-5th Grade Parent Orientation
May 17Testing—Keystone Exams
May 18No school1 school dayAll Schools Closed / Offices Open (Snow Make Up Day) Election Day
May 18Testing—Keystone Exams
May 19Testing—Keystone Exams
May 20Testing—Keystone Exams
May 22–24Testing—Keystone Exams
May 25Testing—Keystone Exams
May 26Testing—Keystone Exams
May 27Early release—Early Dismissal Grs K-5 Grs K-5 Grading Day Grs 6-12 Full Day of School
May 27Testing—Keystone Exams
May 28Teacher work day, no students1 school dayAll Schools Closed/ Offices Open Window Closes for Grs K-12 Inservice - Prefessional Learning (Virtual Asynchronous)
May 28Testing—Keystone Exams
May 31Memorial Day1 school dayAll Schools & Offices Closed (Memorial Day)
June 5Testing—SAT Testing
June 7Graduation—Early Dismissal Grs 9-12 MBIT Graduation (outside)
June 9Graduation—William Tennent Graduation (Rain Date 6/10) Early Dismissal Grs K-12
June 10Last day of school—Early Dismissal Grd K-11 Last Day of School
June 11Teacher work day, no students—Grs K-12 Inservice - Professional Learning/ Teacher Close Out/ Transition Planning

Sources

  1. District’s calendar: https://www.centennialsd.org/events (the source)
  2. District website: https://www.centennialsd.org
  3. Calendar feed read on October 8, 2026: https://thrillshare-cmsv2.services.thrillshare.com/api/v4/o/14186/cms/events

How these dates are read and labeled: Methodology.

Other Pennsylvania districts

William Penn: 32 school days off Reading: 30 school days off South Western: 30 school days off Wilson: 30 school days off