The following links provide up to date information on national holidays around the world:
1) U.S. Office of Personnel Management:
www.opm.gov/Operating_Status_Schedules/fedhol/2009.asp
2) Earth Calendar:
www.earthcalendar.net/index.php
3) National holidays around the world:
www.infoplease.com/ipa/A0907876.html
4) UK Bank holidays and British Summer Time:
www.direct.gov.uk/
5) Earth Calendar:
www.earthcalendar.net/index.php