Kwanzaa is a week long celebration (Dec 25 to Jan 1) held in the United States to honor universal African heritage and culture.
Kwanzaa is a celebration that came out of the black nationalist movement of the 1960s.
It was created as a way to help African Americans reconnect with their African cultural and historical heritage.
Every night, people light a candle on a kinara (candle holder) which represent Kwanzaa's principles:
Unity, Self-determination, Collective Work and Responsibility, Cooperative Economics, Purpose, Creativity, and Faith. (source)