Kwanzaa is a non-religious African American holiday that takes place  over seven days from December 26 to January 1. It draws on African  traditions and takes its name from the Swahili phrase for "first  fruits." Its origins are in harvest celebrations that occurred in  ancient and modern times in various places across the African continent.
These traditions were synthesized and reinvented in 1966 by Maulana  Karenga as the contemporary cultural festival known as Kwanzaa. The U.S.  Postal Service issued its first Kwanzaa commemorative stamp in 1997.
The holiday is intended to be a celebration of seven principles -  unity, self-determination, collective work and responsibility,  cooperative economics, purpose, creativity and faith - based on values  prevalent in African culture.