By default, Outlook does not show holidays on the calendar. If you would like to have holidays show in Outlook 2007, you can do the following quick steps:
Open Outlook 2007. - From the tools menu, click Options.
- Click the Calendar Options... button.
- Click the Add Holidays... button.
- Place a check beside any appropriate locations.
- Click OK.
- Click OK to close the Calendar Options dialog box.
- Click OK to close the Options dialog box.