The BBC's Religion and Ethics website provides information on many of the worlds major belief systems. Each includes an "At a Glance" section; history; belief overview; holy days; customs; subdivisions; rites & rituals; worship; texts; living; people; and ethics. An excellent resource for learning and teaching about world religions and belief structures as a whole
A brief overview of the Thanksgiving holiday from the National Archives and Records Administration, including links to more primary resources relating to Thanksgiving
A Library of Congress exhibition documenting 350 years of Jewish life in America featuring more than two hundred sources detailing Jewish life and history in the United States
A history of Jews in America from the 17th century to the present provided by the Center for Jewish History and providing a variety of resources including text, images, audio, and video
Most cultures in the world have a New Year celebration marking the start of the new year based on that particular culture's calendar. This Wikipedia entry does a uniquely impressive job of detailing the incredibly diverse range of New Year's traditions and celebrations across the world
Delivered December 24, 1941 at 5:10 p.m., this is a transcript of President Roosevelt and Prime Minister Churchill's 1941 Christmas Eve address; from the National Archives
From the Discovery Channel's How Stuff Works, a collection of articles and resources providing an introduction to the Christmas holiday as well as other background
From the BBC's British History website, a history of the Christmas celebration through "ten ages," including Medieval, Elizabethan, Mid Victorian, World War Two, etc.
The official Kwanzaa website, from Dr. Maulana Karenga, the creator of Kwanzaa and Professor of Africana Studies, California State University--Long Beach and Chair of The Organization Us and The National Association of Kawaida Organizations (NAKO)