The 3rd Day of Kwanzaa
The 3rd day of a week long festival celebrating the African American people, their culture and their history.
On the third day the black candle is lit, then the farthest left red, and then the farthest right green candle. This represents the 3rd principle of Kwanzaa – Ujima (oo-JEE-mah): Collective work and responsibility.
source: Kwanzaa on the Net – Seven Days of Celebration