General websites for many holidays
http://kids.nationalgeographic.com/explore/winter-celebrations/#WH-Solstice.jpg
http://www.learnersonline.com/lol/learners-online/celebrating-winter-holidays-around-the-world-wide-web/
http://www.scholastic.com/teachers/article/internet-field-trip-holidays-’round-world-wide-web
http://www.kidsturncentral.com/holidays/glossary/holidaysgloss.htm
http://www.holidayinsights.com/world/
http://www.timeanddate.com/holidays/
http://history of christmas in america