Office of Personnel Management

This website lists all of the federally mandated holidays from the year 1997 until 2010.

http://www.opm.gov/Operating_Status_Schedules/fedhol/index.asp

Holidays in the Wikipedia

Find out about various holidays including Jewish, Christian, Muslim, Hindu, Celtic, Bahai and more.

http://en.wikipedia.org/wiki/Holiday

Spirit Halloween

Shop Spirit Halloween for Halloween costumes for women, men, children and even pets. Over 400 stores nationwide for Halloween costumes, decorations and more to make the best Halloween ever.

http://www.spirithalloween.com/