When Rabbi Shapira paid a visit to the Chafetz Chaim in Radin, the Chafetz Chaim crowned him with the title of “the inventor of Daf Yomi.” The Chafetz Chaim said to him, “I love you enormously. Do you know why?”
“Probably because of Daf Yomi,” Rabbi Shapira responded. #dafyomi
Rabbi Meir Shapiro, The Rav of Lublin and Creator of Daf Yomi