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Weekend
Next 7 Days
May 2026
Coming Up
School Breaks
Holidays (No School)
The Jefferson H S school calendar for the 2025-26 school year runs from Tuesday, August 26, 2025 to Friday, May 29, 2026 in Boulder, Montana.
- •3 scheduled breaks and 20 holidays throughout the year
- •Spring break: Apr 6 – Apr 6
- •Winter break: Dec 19 – Jan 5
Jefferson H S starts school 10 days later than most Montana districts. Winter break starts 3 days earlier than the most common Montana schedule.
Download the iCal file above to sync all Jefferson H S dates with your phone or computer.
Frequently Asked Questions
Is Jefferson H S school open today?
No, today is Saturday - school is not in session on weekends.
When is the next day off for Jefferson H S?
The next day off is Monday, May 25, 2026 for Memorial Day.
When is the first day of school for Jefferson H S?
The first day of school for Jefferson H S in 2025-26 is Tuesday, August 26, 2025.
When is the last day of school for Jefferson H S?
The last day of school for Jefferson H S in 2025-26 is Friday, May 29, 2026.
When is spring break for Jefferson H S?
Spring break for Jefferson H S is Monday, April 6, 2026 to Monday, April 6, 2026.
When is winter break for Jefferson H S?
Winter break for Jefferson H S is Friday, December 19, 2025 to Monday, January 5, 2026.
When do students go back to school after winter break?
Students in Jefferson H S return to school after winter break on Tuesday, January 6, 2026. Winter break ends on Monday, January 5, 2026.
When is Thanksgiving break for Jefferson H S?
Thanksgiving break for Jefferson H S is Thursday, November 27, 2025 to Thursday, November 27, 2025.
How do I add Jefferson H S calendar to my phone?
Click the "Add to Calendar" button at the top of this page to download the iCal (.ics) file. Then:
iPhone/iPad: Tap the downloaded file, then tap "Add All" to add events to your Calendar app.
Android: Open the file with Google Calendar, review the events, and tap "Import".
Google Calendar (web): Go to Settings → Import & Export → Select the .ics file → Import.
Outlook: Double-click the file or drag it into your Outlook calendar.
Apple Calendar (Mac): Double-click the file or go to File → Import → select the .ics file.
What school district is Boulder, MT in?
Boulder, Montana is served by Jefferson H S. This page shows the 2025-26 school calendar including first day, last day, breaks, and holidays.
When does school start in Boulder?
School in Boulder (Jefferson H S) starts on Tuesday, August 26, 2025 for the 2025-26 school year.
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Last updated: December 31, 2025
Source: Jefferson H S Official Calendar