Mequon-Thiensville School District 2025-2026 Calendar: Complete Dates for All Grade Levels
The Mequon-Thiensville School District has released comprehensive calendars for the 2025-2026 school year, thoughtfully organized by grade levels to meet the unique needs of students from 4K through 12th grade. Whether your child is just beginning their educational journey in 4K or preparing for graduation at Homestead High School, this guide covers all the essential dates for every family in our district.
Universal Dates for All Students (4K-12)
Back to School
First Day of School: Tuesday, September 2, 2025
All students across every grade level will return to school on September 2nd, ready for another year of learning and growth.
Labor Day: Monday, September 1, 2025
No school for all students and staff.
Major Breaks & Holidays
Thanksgiving Break: November 26-28, 2025
• Wednesday, November 26: No school for students and staff
• Thursday, November 27: Thanksgiving Day
• Friday, November 28: No school for students and staff
Winter Break: December 22, 2025 - January 2, 2026
Extended winter break for all students to enjoy the holiday season with family.
Dr. Martin Luther King Jr. Day: Monday, January 19, 2026
No school for all students and staff in observance of this important holiday.
Spring Break: March 30 - April 3, 2026
All students will enjoy a full week of spring break.
Memorial Day: Monday, May 25, 2026
No school for all students and staff.
Last Day of School: Wednesday, June 11, 2026
The final day of instruction for all grade levels.
Grade-Specific Information
4K (4-Year-Old Kindergarten)
Key Dates:
• Rosh Hashanah: September 23, 2025 (No school)
• Yom Kippur: October 2, 2025 (No school)
• Staff Inservice: October 16, 2025 (No school for students)
• Parent/Teacher Conferences: October 21, 2025 (Regular school day)
• Staff Inservice: February 5, 2025 (No school for students)
• Teacher Inservice: March 13, 2025 (No school for students)
• Staff Inservice: April 6, 2025 (No school for students)
Trimester Schedule:
• Trimester 1 ends: November 25, 2025
• Trimester 2 ends: March 12, 2026
• Trimester 3 ends: June 11, 2026
Elementary (Grades K-5)
Key Dates:
• Rosh Hashanah: September 23, 2025 (No school)
• Yom Kippur: October 2, 2025 (No school)
• Staff Inservice: October 16, 2025 (No school for students)
• Parent/Teacher Conferences: October 21, 2025 (Regular school day)
• Staff Inservice: February 5, 2025 (No school for students)
• Teacher Inservice: March 13, 2025 (No school for students)
• Staff Inservice: April 6, 2025 (No school for students)
Trimester Schedule:
• Trimester 1 ends: November 25, 2025
• Trimester 2 ends: March 12, 2026
• Trimester 3 ends: June 11, 2026
Middle School (Grades 6-8)
Key Dates:
• Rosh Hashanah: September 23, 2025 (No school)
• Yom Kippur: October 2, 2025 (No school)
• Staff Inservice: October 16, 2025 (No school for students)
• Parent/Teacher Conferences: October 21, 2025 (Regular school day)
• Staff Inservice: February 5, 2025 (No school for students)
• Teacher Inservice: March 13, 2025 (No school for students)
• Staff Inservice: April 6, 2025 (No school for students)
Trimester Schedule:
• Trimester 1 ends: November 25, 2025
• Trimester 2 ends: March 12, 2026
• Trimester 3 ends: June 11, 2026
Special Scheduling:
• Late Start Days: Various dates at 10:12 AM (check specific calendar)
• Early Release Days: 12:45 PM on select dates
High School (Grades 9-12)
Key Dates:
• Rosh Hashanah: September 23, 2025 (No school)
• Yom Kippur: October 2, 2025 (No school)
• Staff Inservice: October 16, 2025 (No school for students)
• Parent/Teacher Conferences: October 21, 2025 (Regular school day)
• Staff Inservice: February 16, 2025 (No school for students)
• Teacher Inservice: March 13, 2025 (No school for students)
• Staff Inservice: April 6, 2025 (No school for students)
Trimester Schedule:
• Trimester 1 ends: November 25, 2025
• Trimester 2 ends: March 12, 2026
• Trimester 3 ends: June 11, 2026
Special Scheduling:
• Late Start Days: 9:40 AM on select dates
• Early Release Days: 12:00 PM on select dates
Conference Days by Grade Level
Parent/Teacher Conferences
• October 21, 2025: Regular school day with conferences
• January 22, 2026: Parent/Teacher conferences (Regular school day for most grades)
Note: Conference schedules may vary slightly by grade level. Please check your specific school’s calendar for exact times and formats.
Professional Development Days
The district has several professional development days throughout the year when students are not in school but teachers are working to improve their instructional practices:
• October 16, 2025: Staff Inservice (All grades)
• February 5, 2026: Staff Inservice (4K-8)
• February 16, 2026: Staff Inservice (9-12 only)
• March 13, 2026: Teacher Inservice (All grades)
• April 6, 2026: Staff Inservice (All grades)
Special Schedule Days
Late Start Days
• Grades 6-8: 10:12 AM start time on select dates
• Grades 9-12: 9:40 AM start time on select dates
• Grades 4K-5: Regular schedule maintained
Early Release Days
• Grades 6-8: 12:45 PM release on select dates
• Grades 9-12: 12:00 PM release on select dates
• Grades 4K-5: Regular schedule maintained
Religious Holidays
The Mequon-Thiensville School District recognizes several religious holidays:
• Rosh Hashanah: September 23, 2025
• Yom Kippur: October 2, 2025
Weather Emergency Days
The district builds in weather emergency days to account for potential school closures due to inclement weather. If these days are not used, they may result in an earlier end to the school year.
Planning Tips for Families
Childcare Planning
• Mark professional development days on your calendar early
• Note that some inservice days vary by grade level
• Plan for late start and early release days, especially for middle and high school students
Academic Planning
• Elementary families: Work with the trimester system for progress reports
• Middle and high school families: Plan around late start and early release schedules
• All families: Conference days offer great opportunities to connect with teachers
Travel Planning
• Thanksgiving Break: Extended 4-day weekend perfect for family trips
• Winter Break: Two full weeks for holiday celebrations and family time
• Spring Break: One week in early April for spring activities
• Summer Break: Begins June 12, 2026
Back to School Events
Look for specific back-to-school events at your child’s school:
• August 27, 2025: Meet the Teacher events begin
• September 2, 2025: First day excitement with “Meet and Greet” opportunities
Important Reminders
Grade-Level Specific Calendars
Each grade level has its own detailed calendar with specific timing for:
• Late start days
• Early release days
• Conference schedules
• Professional development days
Stay Connected
• Visit mtsd.k12.wi.us for the most current information
• Sign up for district alerts and notifications
• Check your school’s specific calendar for additional events
• Follow your child’s school on social media for updates
Contact Information
For questions about the calendar or specific school events, contact:
• District Office: Main number for general inquiries
• Your child’s school: Direct contact for school-specific questions
• Transportation: For bus schedule questions related to late start/early release days
Looking Ahead
The 2025-2026 school year promises to be another excellent year of learning and growth in the Mequon-Thiensville School District. With careful attention to the needs of different grade levels and a commitment to providing quality education, our district continues to serve families with distinction.
Save this guide and refer to it throughout the year to stay organized and make the most of your child’s educational experience. Here’s to a successful 2025-2026 school year!
This calendar information is based on the official 2025-2026 Mequon-Thiensville School District calendars. For the most up-to-date information and any changes, please visit the district website or contact your child’s school directly.