After moving to Memphis, Tennessee, Bishop Mason established a local congregation called Temple COGIC. He also established the COGIC national headquarters there. He called for an annual gathering of COGIC members, known as the "International Holy Convocation", to be held in Memphis. Originally, this gathering of the 'Saints' lasted for twenty days, from November 25 to December 14. This seasonal period was selected because most of the COGIC members were farmers and were finished harvesting their crops around this time. COGIC members gathered for praying, fasting, teaching, preaching, fellowship and conducting business related to the national COGIC organization.