Dr. Maulana Karenga, professor and chairman of Black Studies at California State University, Long Beach, created Kwanzaa in 1966. After the Watts riots in Los Angeles, Dr. Karenga searched for ways to bring African-Americans together as a community. He founded US, a cultural organization, and started to research African "first fruit" (harvest) celebrations. Karenga combined aspects of several different harvest celebrations, such as those of the Ashanti and those of the Zulu, to form the basis of Kwanzaa.
Kwanzaa is celebration that is celebrated by African American from December 26th to January 1st every year. Kwanzaa means the first fruit and it is celebrated to promote African American culture. Go to http://musiced.about.com/od/historyofmusic/a/kwanzaa.htm for more information.