You can add a holiday rule from the Project Navigator.
To add a holiday rule:
Expand Organization in the Project Navigator.
If possible, expand Holiday Rules (). Any existing holiday rules will be listed. If you cannot expand, no holiday rules exist.
Right-click on Holiday Rules
, and select New from the context menu. The Holiday Rule dialog box will appear.
Input the name of the holiday rule in the Name field and click OK to add it. The new holiday rule is created, but it contains no holidays. An editor for the holiday rule will open.
In the holiday rule editor, you can add holidays by clicking Add in the Roles pane, and adding the desired holiday(s) from the Holiday Rule dialog box.
When you are done adding holidays, save the holiday rule.
The new holiday rule has been created.
Note: If you close the editor without saving, the holiday rule will still exist, but will no have any of the holidays added in step 5.