"The Happiest Day in the Life of Olli Mäki" is a Finnish film directed by Juho Kuosmanen, released in 2016. The story is based on the true events of Olli Mäki, a boxer who prepares for a world championship match in 1962. The film explores his personal struggles and the pressures of competition, highlighting his relationship with his girlfriend, Raija. Set against the backdrop of Finland, the film captures the contrast between Olli's aspirations and his desire for a simple, happy life. It emphasizes themes of love, ambition, and the pursuit of happiness, all while showcasing the cultural atmosphere of the time.