C.S. Lewis publicly identified as a Christian convert in 1931.
Lewis’s return to Christianity developed over several years. He had moved away from the faith of his childhood, but conversations with writers and scholars, including J.R.R. Tolkien and Hugo Dyson, contributed to his renewed interest in Christian belief. Lewis later described his conversion as a movement toward Christianity rather than simply a return to an earlier childhood position.
In 1931, he wrote to a friend that he had accepted Christianity. His religious views then became a major influence on his essays, sermons, apologetic books, and fiction.
The date is sometimes confused with 1929, when Lewis described himself as becoming a theist, or with 1930, when his philosophical and religious outlook was still developing. The commonly cited date for his conversion to Christianity is 1931.