Saint James Day takes place on July 25, 2017. James, son of Zebedee was one of the Twelve Apostles of Jesus, and traditionally considered the first apostle to be martyred. He was a son of Zebedee and Salome, and brother of John the Apostle. He is also called James the Greater or James the Great to distinguish him from James, son of Alphaeus. James the Greater is the patron saint of Spain.
Saint James had a special place in the Central African Kingdom of Kongo because of his association with the founding of Christianity in the country in the late 15th century. Portuguese sailors and diplomats brought the saint to Kongo. When King Afonso I of Kongo was facing a rival in battle, he reported that a vision of Saint James and the Heavenly Host appeared in the sky, frightened Mpanzu a Kitima's soldiers, and gave Afonso the victory. As a result, he declared that Saint James' feast day should be celebrated as a national holiday. (With material from: Wikipedia)