I am happy to be able to give you all a little information on a man who did so much for humanity in general. Dr. Martin Luther King Jr. was born on January 15, 1929 making him a Capricorn and an earth sign. Capricorns are very dependable, honest, strong minded people. They are very business oriented and very reliable……These are WONDERFUL traits to have. I think Dr. MLK is a very admirable Capricorn man.