Adding holidays is simple ... and here's how. Note: To avoid creating duplicate entries on your Outlook / Exchange calendar, search for existing holidays and remove them before continuing.
To add holidays to your Exchange calendar using Microsoft Outlook:
In Outlook 2010, click the File tab, and then click Options.
From the menu on the left, click Calendar.
Then click Add Holidays.Read the rest of the article here ...
http://www.funkykit.com/how-to/8517-how-do-i-add-or-remove-holidays-in-my-outlook-exchange-calendar.html
