How to Add Non Working Days in Microsoft Project

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Here’s how to do it:

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1. Open your Project file and go to the 'Project' tab.
2. Choose and select 'Change Working Time'.
3. In the dialog box, go to the 'Exceptions' tab.
4. In the 'Exceptions' tab, enter the name and select the start and finish dates of your non-working day.
5. Click 'Details' to set your non-working day.
6. Make sure to set your expectations as 'Nonworking'.
7. Click 'OK' to save the changes.