This week, millions of people in Central Africa celebrated Christmas. The followers of Kimbangistism, one of the largest independent churches in Africa, believe Christ was born on the 25th of May. Simon Kimbangistu, who founded the movement in 1921, was jailed by the Belgian colonial powers for his black nationalist ideology. He died in prison in 1951, but his church has flourished. NPR's Jason Beaubien reports.