Windsor Mill Middle School

2026–2027
A / B Day Calendar

Click any school day to see whether it is an A Day or B Day, view early-dismissal days, professional development days, holidays, and important school-calendar information.

A Day
B Day
No School / PD
BCPS • School Year 2026–2027

Monthly School Calendar

Use the arrows or month buttons to navigate. Select a date for more information.

School Year 2026–2027

August 2026

Opening Month
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Monday
31
August 2026
Selected School Day

A Day

Opening Day for students. Students follow their A-Day classes.

A Day Opening Day
A A Day
B B Day
PD Professional Development
School Closed
/ 3-Hour Early Dismissal
Save the Date

Important Calendar Dates

Some dates affect the regular school schedule even though the A/B rotation continues.

🎒

August 31

Opening Day for students.

October 30

First Marking Period ends. Schools close 3 hours early.

🦃

November 25–27

Early dismissal November 25, followed by Thanksgiving holiday.

❄️

December 23

Winter Break begins at the end of the school day.

📚

January 15

Second Marking Period ends. Schools close 3 hours early.

🧑‍🏫

February 10

Schools close 3 hours early; afternoon staff professional development.

🌸

March 19

Spring Break begins at the end of the school day.

April 2

Third Marking Period ends. Schools close 3 hours early.

☀️

June 16–17

Assessment days currently designated as 3-hour early dismissal days.

Windsor Mill Middle School
2026–2027 A / B Day Calendar
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