Kwanzaa is a week-long celebration held in the United States (and, more recently, Canada) but also celebrated in the Western African Diaspora. The celebration honors African heritage in African-American culture, and is observed from December 26 to January 1, culminating in a feast and gift-giving.
Kwanzaa has seven core principles (Nguzo Saba): Unity, self-determination, collective work and responsibility, cooperative economics, purpose, creativity, and faith. It was created by Maulana Karenga, and was first celebrated in 1966–67. All You Need To Know About Kwanzaa.