Original: Deportivo Saprissa was founded on 16 July, 1935 and they entered the Costa Rican Third Division as Saprissa F.C. They were promoted to the Primera División de Costa Rica, making their debut in the top flight on 21 August, 1949.
Simplified: The team was founded on July 16, 1935. It became a part of the top league, Primera División de Costa Rica on August 21, 1949.