MDO’s academic calendar for teacher workdays, holidays, and breaks is similar to that of Fairfax County Public Schools. For information on our inclement weather policy, click here.
 
Events can be added throughout the year, and the calendar is subject to change.
If an event occurs on a non-school day for your child, you are welcome
to bring your child and stay with him/her for the event. 
 

MDO 2025-2026 School Calendar