For the 2026–2027 school year, Harleton ISD publishes its official academic calendar for Texas. Classes begin Aug 12 and end May 20. All dates listed below are sourced from the district's official publications. Verify with Harleton ISD before scheduling around them.
Visual Calendar
Official Calendar Images
Official calendar scans for Harleton ISD. Click any page to open the full-size image.
School Calendar
Interactive Calendar
Harleton ISD's 2026–2027 academic calendar — holidays, breaks, and key dates.
Month by Month Calendar
- Staff Development/Work DaysAug 5 — Aug 7Teacher Day
- Staff Development/Work DaysAug 10 — Aug 11Teacher Day
- First Day of InstructionAug 12, 2026School Opens
- School HolidaySep 7, 2026No School
- End of 1st Six WeeksSep 18, 2026Grading
- Beginning of 2nd Six WeeksSep 21, 2026Event
- Early Release at 12:30 PMOct 9, 2026Early Release
- School Holiday/Exchange DayOct 12, 2026No School
- End of 2nd Six WeeksOct 30, 2026Grading
- Beginning of 3rd Six WeeksNov 2, 2026Event
- School Holidays/Exchange DaysNov 23 — Nov 24No School
- Thanksgiving BreakNov 25 — Nov 27No School
- Staff Development/Work DayNov 30, 2026Teacher Day
- HISD State Testing WindowDec 1 — Dec 4Event
- HISD State Testing WindowDec 7 — Dec 11Event
- HISD State Testing WindowDec 14 — Dec 17Event
- Early Release at 12:30 PM and End of 3rd Six WeeksDec 18, 2026Early Release
- Christmas/Winter BreakDec 21 — Jan 1No School
- Staff Development/Work DayJan 4, 2027Teacher Day
- Beginning of Second Semester and 4th Six WeeksJan 5, 2027Event
- School HolidayJan 18, 2027No School
- Early Release at 12:30 PM and End of 4th Six WeeksFeb 12, 2027Early Release
- Winter BreakFeb 15 — Feb 19No School
- Beginning of 5th Six WeeksFeb 22, 2027Event
- Early Release at 12:30 PMMar 25, 2027Early Release
- Spring BreakMar 26 — Apr 2No School
- End of 5th Six WeeksApr 9, 2027Grading
- Beginning of 6th Six WeeksApr 12, 2027Event
- HISD State Testing WindowApr 12 — Apr 16Event
- HISD State Testing WindowApr 19 — Apr 23Event
- HISD State Testing WindowApr 26 — Apr 30Event
- Early Release at 12:30 PM, Last Day of Instruction and End of 6th Six WeeksMay 20, 2027School Closes
- Staff Development/Work Day and Graduation DayMay 21, 2027Teacher Day
- Make-up Days, If NeededMay 24 — May 28Event
- School HolidayMay 31, 2027No School
- Make-up Days, If NeededJun 1 — Jun 4Event
About the District
School Information
Details and contact information for Harleton ISD.
Sources and Checks
Where these dates come from
How the 2026–2027 Harleton ISD calendar on this page was compiled and what to re-check before you rely on it.
- ✓District publication. Dates are taken from the calendar Harleton ISD published for 2026–2027, shown as images on this page.
- ✓Official website. Cross-checked against harletonisd.net.
- ✓Board-approved version is used where the district marks one.
- ✓First and last day match the published calendar.
- ✓Breaks and holidays are listed with their full date ranges.
- ✓Teacher / no-school days are included where the district lists them.
- ✓Changes happen. Districts amend calendars mid-year — confirm with Harleton ISD before booking around a date.
Common Questions
Frequently Asked Questions
Harleton ISD Calendar 2026–2027 — important dates and answers.
The first day of instruction in Harleton ISD is August 12, 2026.
Spring break in Harleton ISD is from March 26 through April 2, 2027.
Christmas break in Harleton ISD is from December 21, 2026, through January 1, 2027.
Harleton ISD has a winter break from February 15 through February 19, 2027.
Thanksgiving break in Harleton ISD is from November 23 through November 27, 2026.
The last day of instruction in Harleton ISD is May 20, 2027, with an early release at 12:30 PM.
Staff development and work days are August 5-7, August 10-11, 2026; November 30, 2026; January 4, 2027; and May 21, 2027.
Early release at 12:30 PM is scheduled for October 9, December 18, 2026; February 12, March 25, and May 20, 2027.
Harleton ISD is closed for the Labor Day holiday on September 7, 2026.
Harleton ISD is closed for Martin Luther King Jr. Day on January 18, 2027.
Make-up days, if needed, are scheduled from May 24 through May 28 and June 1 through June 4, 2027.
Graduation day in Harleton ISD is May 21, 2027.
The first semester ends on December 18, 2026.
The second semester begins on January 5, 2027.
The Harleton ISD 2026-2027 school calendar includes 172 instructional days.
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Recently Updated Calendars
Other Texas school district calendars — recently added or updated.