- First day of schoolAugust 12, 2026
- Labor DaySeptember 7, 2026
- Fall breakOctober 12–16, 2026
- Thanksgiving breakNovember 23–27, 2026
- Winter breakDecember 21, 2026 – January 4, 2027
- Spring breakMarch 8–12, 2027
- Last day of schoolMay 21, 2027
Last updated September 18, 2026
Interactive calendar
Browse the key dates month by month — colored markers show each event.
🎒 First day: Wednesday, August 12, 2026
Calendar Dates
- Staff DevelopmentAug 3 — Aug 11Teacher Day
- First Day of SchoolAug 12, 2026School Opens
- Half Day Students / Staff DevelopmentAug 28, 2026Early Release
- Labor Day HolidaySep 7, 2026No School
- 1st 6-weeks EndsSep 18, 2026Event
- 2nd 6-weeks BeginsSep 21, 2026Event
- Half Day Students / Staff DevelopmentSep 25, 2026Early Release
- Fall Break / Teacher Exchange DaysOct 12 — Oct 16No School
- Teacher Exchange Days (Non-Instructional)Oct 12 — Oct 13Teacher Day
- 2nd 6-weeks EndsOct 30, 2026Event
- Parent/Teacher Conferences & Half Day StudentsOct 30, 2026Early Release
- 3rd 6-weeks BeginsNov 2, 2026Event
- Half Day Students / Staff DevelopmentNov 20, 2026Early Release
- Thanksgiving BreakNov 23 — Nov 27No School
- STAAR/EOC Testing WindowDec 8 — Dec 11Event
- 3rd 6-weeks EndsDec 18, 2026Event
- Half Day Students / Staff DevelopmentDec 18, 2026Early Release
- Christmas BreakDec 21 — Dec 31No School
- Christmas Break (Continued)Jan 1 — Jan 4No School
- Staff Development DayJan 4, 2027Teacher Day
- 4th 6-weeks Begins / 2nd Semester StartsJan 5, 2027Grading
- Teacher Exchange Day (Non-Instructional)Jan 18, 2027Teacher Day
- Half Day Students / Staff DevelopmentJan 29, 2027Early Release
- Winter Break / Teacher Exchange DaysFeb 1 — Feb 5No School
- 4th 6-weeks EndsFeb 12, 2027Event
- 5th 6-weeks BeginsFeb 15, 2027Event
- Half Day Students / Staff DevelopmentFeb 26, 2027Early Release
- Spring BreakMar 8 — Mar 12No School
- Half Day Students / Staff DevelopmentMar 25, 2027Early Release
- Good FridayMar 26, 2027No School
- Bad Weather DayMar 29, 2027Event
- 5th 6-weeks EndsApr 2, 2027Event
- 6th 6-weeks BeginsApr 5, 2027Event
- STAAR/EOC Testing WindowsApr 6 — Apr 23Event
- Half Day Students / Staff DevelopmentApr 30, 2027Early Release
- STAAR/EOC Testing WindowMay 4 — May 14Event
- 6th 6-weeks Ends / Last Day of SchoolMay 21, 2027School Closes
- Half Day Students / Staff DevelopmentMay 21, 2027Early Release
- GraduationMay 22, 2027Event
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Frequently asked questions
When is the first day of school for Marathon ISD in 2026-2027?
The first day of school for Marathon ISD is Wednesday, August 12, 2026.
When is the last day of school for Marathon ISD in 2026-2027?
The last day of school for Marathon ISD is Friday, May 21, 2027.
When is Thanksgiving break for Marathon ISD?
Marathon ISD has Thanksgiving break from November 23 through 27, 2026.
When is winter break for Marathon ISD?
Marathon ISD's winter break runs from December 21 through January 4.
When is spring break for Marathon ISD in 2026-2027?
Marathon ISD's spring break is March 8 through 12, 2027.
When is fall break for Marathon ISD?
Marathon ISD has a fall break from October 12 through 16, 2026.
Does Marathon ISD have school on Labor Day?
No. Marathon ISD is closed for Labor Day on Monday, September 7, 2026.
