Quick summary
To include holidays in Microsoft Project, you add them as calendar exceptions via the Change Working Time dialog under the Project tab. This marks specific dates as non-working days so your project schedule automatically accounts for holidays.
Steps
- Launch Microsoft Project and navigate to the Project tab in the top ribbon menu.
- Select Change Working Time from the options to open the calendar management dialog where you can manage calendar exceptions for holidays.
- Click on the Exceptions tab below the calendar view to access the area where you define holiday dates.
- Enter a descriptive name for the holiday, then specify the start and finish dates for the exception.
- Click OK to save the changes and apply the holiday to your project calendar.



