Here is a quick and easy way to add all holidays to your Outlook 2003 Calendar. This tip also works for countries other than the United States.
Open Outlook and go to Tools \ Options \ Calendar Options.
Under Calendar Options click on the “Add Holidays” button.
Choose your respective Country and click OK.
You will receive a confirmation screen after Outlook automatically populates your calendar with all Holidays.
You can then go through your Calendar for the year and see what holidays fall on what days. This comes in very handy when planning for upcoming events and meetings.