Mercer Island School District Calendar (2025-2026)
Calendar by educounty.net
| Date | Event |
|---|---|
| 8/18-19, 2025 | New Teacher Orientation |
| 8/21, 2025 | MIHS, IMS & Elem. AM PD/PM Prep |
| 8/22, 2025 | MIHS, IMS & Elem. AM PD/PM Prep |
| 8/25, 2025 | Instructional Technology Day |
| 8/26, 2025 | Pre-Service Day (Classified Tech Day) |
| 8/27, 2025 | First Day of School (All Students) |
| 9/1, 2025 | Labor Day (No School) |
| 9/2-4, 2025 | Kindergarten conferences No school for Kindergarten students |
| 10/10, 2025 | No School Students Teacher Full PD Day |
| 11/7, 2025 | First Quarter Ends (MIHS) |
| 11/11, 2025 | Veterans Day (No School) |
| 11/17, 2025 | Half Day Elem. Only Elen. Grading Day |
| 11/24-26, 2025 | Elem. Students (No School) Elem. Conferences (2.5 Days) |
| 11/26, 2025 | First Trimester Ends (IMS/Elem.) Student Half Day (IMS/MIHS) Regular Start (MIHS) Progress Report Prep (IMS) |
| 11/27, 2025 | Thanksgiving Day (No School) |
| 11/28, 2025 | Native American Heritage Day (No School) |
| 12/22-1/5, 2025-2026 | Winter Break (No School) |
| 1/6, 2026 | School Resumes |
| 1/19, 2026 | Martin Luther King Jr. Day (No School) |
| 1/20-23, 2026 | Finals Week (MIHS) |
| 1/23, 2026 | Second Quarter Ends (MIHS) |
| 1/26, 2026 | No School Students IMS & Elem. Certificated - Half PD Day MIHS Certificated - Non Workday |
| 2/16, 2026 | Presidents' Day (No School) |
| 2/17-20, 2026 | Mid-Winter Break (No School) |
| 3/19, 2026 | Second Trimester Ends (IMS/Elem.) |
| 3/20, 2026 | No School Students MIHS Certificated - Half PD Day IMS & Elem. Certificated - Non workday |
| 3/23, 2026 | Third Quarter Ends (MIHS) |
| 4/10, 2026 | Scheduled Weather Makeup Day |
| 4/13-17, 2026 | Spring Break (No School) |
| 5/22, 2026 | Scheduled Weather Makeup Day |
| 5/25, 2026 | Memorial Day (No School) |
| 6/12, 2026 | Half Day Elem. Only Elem. Grading Day |
| 6/18, 2026 | Last Day of School (Half Day All Students) |
| 6/19, 2026 | Juneteenth (No School for Students or Staff) |
Mercer Island School District Schools Calendar 2025-2026 FAQs
When is the first day of school in Mercer Island School District?
The first day of school is August 27, 2025. [cite: 10]
When is Spring Break in Mercer Island School District?
Spring Break is from April 13-17, 2026. [cite: 24]
When is Winter Break in Mercer Island School District?
Winter Break is from December 22, 2025 to January 5, 2026. [cite: 12]
When is Thanksgiving break in Mercer Island School District?
Thanksgiving break is from November 27-28, 2025. [cite: 12]
When is the last day of school in Mercer Island School District?
The last day of school is June 18, 2026. [cite: 25]
Is there school on Labor Day?
No, there is no school on Labor Day, September 1, 2025. [cite: 10]
Are there any half days?
Yes, there are half days. For Elementary, the half day is on June 12, 2026. [cite: 24] The last day of school, June 18, 2026, is a half day for all students. [cite: 25]
When is Memorial Day?
Memorial Day is May 25, 2026. [cite: 24]
Calendar Disclaimer
The printable school calendar provided on this page is taken from the official Mercer Island School DistricT Calendar website. Please note that all dates and events are subject to change at the discretion of the school district. For the most accurate and updated information, please refer to the official district website or contact the school helpline.