[4] Born in Koforidua, Eastern Region, Ghana,[5] Sunday started his career playing for local club Kumasi Asante Kotoko, of which he became the captain.
[6][7] In 1975, Sunday moved to Werder Bremen in the Bundesliga, where in two seasons he barely had any playing time, appearing in only one league match against Rot-Weiß Essen on 6 June 1976.
At the 1970 Nations Cup,[10] there was a rematch of the semifinal from two years before, Ghana again defeated the Ivorians winning 2–1, with Sunday scoring the opening goal.
As a coach, Sunday managed his former club Asante Kotoko, leading them to their second African Cup of Champions victory in 1983.
He also managed Abuakwa Susubiribi and Ashanti Goldfieds of Ghana,[12] FC 105 Libreville of Gabon and Ivorian club Africa Sports of Abidjan, whom he also led to the continental title in 1992.